A nucleus and other membrane-bound organelles are found in the cells of eukaryotes, which are creatures.
What are eukaryotic cells?A nucleus and other membrane-bound organelles are found in the cells of eukaryotes, which are creatures. All mammals, plants, fungi, protists, and the majority of algae are eukaryotic creatures, as are many other types of life. Single cells or many cells can make up eukaryotes.
Eukaryotic cells are comprised of 3 major compartments. There are two different kinds of glycocalyx and appendages in the exterior compartment.The boundary can consist of a cell membrane and possibly a cell wall as well. The internal compartment is comprised of the cytoplasm, the nucleus, cytoskeletal components, and other organelles, such as mitochondria and ribosomes.To learn more about Eukaryotic cells refer to:
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which division of the piriform cortex produces representations of the features of odorant molecules?
The anterior division of the piriform cortex produces representations of the features of odorant molecules.
Piriform cortex is a region of the brain also called as pyriform cortex, situated in the cerebrum region. Its function is to regulate the mechanisms of the olfactory experiences. It is at the junction of the temporal and frontal lobes.
Odorant molecules are the ligands that bind to the odorant receptors present at the neurons of the body involved in the olfactory responses. They are names odorants because they perceive smell. The receptors of the odorant molecules are GPCRs. Odorants are of various types based on the type of functional group they possess.
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4. MSUD is found in one newborn in 200,000 throughout the United States, but one newborn in 200 in the Amish and Mennonites of Lancaster County, Pennsylvania has the disease. Why is there such a difference in the prevalence of the disease?
Answer:
MSUD stands for Maple Syrup Urine Disease. It is very rare, it occurs in about 1 of every 185,000 births worldwide. A child is born with MSUD when both parents are carriers of three specific gene mutations (changes) – one copy from each parent. These three specific amino acids are leucine, isoleucine and valine. Without the needed enzymes, the three amino acids build up and so do their toxic byproducts that are known as ketoacids.
MSUD occurs more often in communities that have little genetic variation (such as the Mennonite and Amish community) These groups have a closure of people (like they marry with their closed relatives) who are carriers of the mutated gene.
after a fracture, during which stage or phase of bone healing is devitalized tissue removed and new bone reorganized into its former structural arrangement?
Remodeling, When does new bone get restructured into its original structural configuration throughout the stage and phase or bone healing after fracture?
New bone: What is it?Fundamentally, "fine bone china" is made with the addition of bone ash. Although new bone products are not as light or translucent as fine bone china, they are whiter, finer, and more enduring than porcelain or fine china due to their calcium oxidecalcium oxide in them.
What making new bone called?The process by which bones are formed is known as osteogenesis or bone ossification. The start of this process occurs during the sixth and seven weeks early embryonic development, and it lasts until roughly age twenty-five, however the exact age varies slightly depending on the person.
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which of the following represents the most likely sequence of the evolution of plants? seedless vascular plants, angiosperms, gymnosperms, bryophytes, charophyceans charophyceans, seedless vascular plants, bryophytes, angiosperms, gymnosperms bryophytes, charophyceans, gymnosperms, seedless vascular plants, angiosperms bryophytes, charophyceans, seedless vascular plants, angiosperms, gymnosperms charophyceans, bryophytes, seedless vascular plants, gymnosperms, angiosperms
Unlike angiosperms, or flowering plants, whose seeds are encased by fully developed , or fruits, gymno, or any vascular plant, reproduce by the use of an exposed seed, or ovule. Many gymnobear their seeds in cones, which are known as " seeds" because they are not visible until they are fully developed.
Tracheophyte predecessors, Rhynia-type plants, Psilophyton, and Gymnosperms are all descendants of chlorophytes. This is the right order. Because they discovered a method of moving materials throughout the plant body, seedless vascular plants achieved a significant advancement in plant evolution. Phloem is used by plants to transport sugars from photosynthesis, and xylem is used to carry water and minerals throughout the plant body. About 420 million years ago, the first vascular plants began to emerge. They most likely descended from bryophyte ancestors that resembled mosses, but their life cycle was dominated by the formation of diploid sporophytes. Early vascular plants changed over time, becoming more like plants in other ways as well.
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do all living things have the same number of genes?
The end outcome is the biodiversity we are familiar with today. However, it is impossible to directly compare species because their genes are varied and they do not all have the same number of genes.
Does each individual possess the same number of genes?Does everyone share a genome? Most people have a similar human genome. The genome does, however, contain variants. Differences in look and health are a result of this genetic variation, which makes up roughly 0.001 percent of each person's DNA.
Do all forms of life have genes?All plants and animals are composed of cells, and those cells contain genetic material in the form of genes and chromosomes (usually in the nucleus).
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The otter allele is found in Lane 2. To which population does it belong
DNA fingerprints are all the genetic markers used to differentiate individuals or populations. In the exposed example, the otter from lane two belong to population 2, Esther passage, because its band is 890 PB in length.
What is DNA fingerprint?
We can refer to DNA fingerprint as the group of genetic markers that differentiate an individual from another individual, or a population from another population.
Genetic markers are unique DNA fragments that are not identical in all individuals or populations. These fragments provide unique information about the individual or the population, so they are usually used to analyze differences, identify a progenitor, or solve a crime.
DNA prints are used to identify the population origin of an individual, or filial relationships, among others.
In the exposed example, we have DNA samples of 8 individuals belonging to three different populations.
Two alleles are used as markers to identify the individual belonging to each group.
Population 1 ⇒ Unakwik inlet ⇒ 610 and 890 bp band length ⇒ both allelesPopulation 2 ⇒ Esther passage ⇒ 890 bp band length ⇒ one allelePopulation 3 ⇒ Wells bay ⇒ 610 bp band length ⇒ the other alleleTo identify individuals belonging to each group, we just need to count the number of band they express.
In the case of individual number 2 (lane 2), there is only one band. So we can dismiss population 1 (because this population has the two alleles).
The expressed band is approximately 890 pb length. It means that it belongs to population 2, Esther passage.
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Select all true statements regarding gamma decay.
Gamma rays are the spectral particles with the highest energy and shortest wavelength. This form of decay does not result in the release of any particles from the nucleus.
What is a nucleus, and what does it do?The spindle holds the alleles, which are the structures that house the genetic traits, and governs and regulates the functions of the cell. The nucleoplasm is the gel-like membrane that contains the nuclear parts are suspended.
Why is the nucleus the most significant cell?Due to its role in the storage, retrieval, and copying of genetic material, the nucleus is regarded as among the most significant components of eukaryotic cells. The genetic material is housed in an organelle with two membranes.
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What environmental parameters would need to be monitored as DDT
Answer:
1. Soil and water samples for levels of DDT and its metabolites
2. Air samples for levels of DDT and its metabolites
3. Sediment samples for levels of DDT and its metabolites
4. Biological samples for levels of DDT and its metabolites
5. Surface water run-off for levels of DDT and its metabolites
6. Aquatic life for levels of DDT and its metabolites
7. Plant life for levels of DDT and its metabolites
8. Temperature and pH levels in the environment
9. Wind speed and direction
10. Rainfall levels
Mendells theory of
genetics aplys to what
organism
Answer:
Pea plants
Explanation:
Mendelian Theory of Genetics In the 1860s, Mendel introduced theories of inheritance, based on his experimental work with pea plants. Before Mendel, most people believed inheritance was due to a blending of parental ‘essences’, much like how mixing blue and yellow paint will produce a green color.
Which of these shows an example of an insertion mutation?
The figure 3 shows an example of an insertion mutation.
What do you mean by insertion mutation?
An insertion is the addition of one or more nucleotide base pairs into a DNA sequence. This can often happen in microsatellite regions due to the DNA polymerase slipping.
Moreover, an insertion changes the DNA sequence by adding one or more nucleotides to the gene. As a result, the protein made from the gene may not function properly.
An insertion mutation occurs when an extra nucleotide is added to the DNA strand during replication. This can happen when the replicating strand "slips," or wrinkles, which allows the extra nucleotide to be incorporated.
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Why are the differences between prokaryotic and eukaryotic translation of mRNA useful to humans?
For the regulation of genes during nutritional shortage and stress, development and differentiation, nervous system function, aging, and illness, translational control in eukaryotic cells is essential. Prokaryotes are able to respond quickly to environmental cues because transcription and translation happen simultaneously in the cytoplasm.
what are Prokaryotes ?Any organism without internal membranes is referred to as a prokaryote, usually written procaryote. These organisms lack a defined nucleus and other organelles.
what is eukaryotic ?eukaryotic can be explained as a living things with nuclei in their cells. Eukaryotes include all animals, all plants, all fungi, and many unicellular creatures.
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an oversimplified or exaggerated generalization used to describe or distinguish a group is called
Answer: An oversimplified or exaggerated generalization used to describe or distinguish a group is called a stereotype.
Which of the following is a characteristic of offspring produced by meiosis, and does not characterize offspring produced by mitosis?
A.
four haploid cells with chromosomes and alleles that are genetically different than the parents
B.
four haploid cells with chromosomes and alleles that are genetically identical to the parents
C.
two diploid cells with chromosomes and alleles that that are genetically different than the parents
D.
two diploid cells with chromosomes and alleles that are genetically identical to the parents
Answer:
the answer is B I did this last week
Remote sensing data helps scientists improve their understanding and predictions about climate change.
a. True
b. False
Remote sensing data helps scientists improve their understanding and predictions about climate change. This is a true statement.
It allows for the monitoring of Earth's surface, oceans, and atmosphere at various spatiotemporal scales, enabling the study of processes or long- and short-term events related to the climate.
Remotele sensing photos, which are captured with specialised cameras, are used by scientists to "feel" the Earth. Examples include: We can see considerably more from the air and space than we can from the ground because of the cameras on satellites and aircraft that snap photographs of large swaths of the Earth's surface.
For example, isotope ratios, elemental analysis, biomarkers, and biogenic silica are examples of chemical proxy records. When combined, these proxies allow us to recreate the climate from hundreds of millions of years ago.
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A primary difference between transcription and replication is that transcription
Answer: Replication is the duplication of two-strands of DNA.
Explanation:
Transcription is the formation of single, identical RNA from the two-stranded DNA.
How do you do a Punnett square and how do you solve it?
In chloroplasts, _____ is the source of the electrons needed for photosynthesis.
Answer: In chloroplasts, water is the source of the electrons needed for photosynthesis.
Explanation:
Hope that helps
what is generally the starting material for whole-genome shotgun sequencing of genomic dna? see section 16.1
The starting material for whole-genome shotgun sequencing of genomic DNA is overlapping fragments of genomic DNA.
The DNA sequence of an organism's genome can be ascertained in a lab using shotgun sequencing. The process entails randomly dividing the genome into tiny DNA fragments that are then individually sequenced. To reconstruct the genome, a computer program searches for overlaps in the DNA sequences and uses those overlaps to put the fragments back together in the right order.
Shotgun sequencing involves randomly slicing the genome into small, sequencing-ready pieces (1 to 2 kbp in length). After being ligated into an appropriate vector, the fragments are partially sequenced. Each fragment can yield 400–500 bp of sequence in a single sequencing run.
Hence, small fragments are sequenced and organized with computer.
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which of the following will increase the rate of transcription? histone acetylation leading to chromatin decompaction d. histone methylation leading to chromatin compaction removal of rna polymerase
Option C. is correct, Gene expression levels have long been known to be significantly influenced by the state of chromatin, the packaging of DNA in eukaryotes. Several chromatin-altering techniques, such as ATP-dependent remodelling.
The cell uses histone modification to control the transcription of certain genes. Since several histone acetyltransferases have been discovered and further studied in recent years, histone acetylation is one of them that is most thoroughly understood. chromatin remodelling and histone acetylation A restrictive barrier to transcription is represented by chromatin. This molecular barrier is a highly dynamic structure that can fit the complete genome's DNA inside the limits of a nucleus while yet allowing access to the genetic material stored inside.
Which of the following will increase the rate of transcription?
a. Activation of a transcriptional repressor
b. Inhibition of a transcriptional activator
c. Histone acetylation leading to chromatin decompaction
d. Histone methylation leading to chromatin compaction Removal of RNA polymerase
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ighlight
Reading Diagnostic Assessment
Select the correct text in the passage.
Which sentence describes a limitation of tidal power as an energy source?
Tidal Power
Renewable energies harness power from natural resources. These technologies are useful because natural resources, such as
sunlight and wind, continually replenish over time. Solar panels and wind turbines are examples of renewable energy sources.
Tidal power is another lesser-known renewable energy source that harnesses power from ocean tides. The tides occur based on
the location and movement of the Moon around the Earth. Because the Moon and the oceans are constants, people can use
energy from tides indefinitely. As with other renewable energies, tidal power is a promising future energy source.
A tidal power plant looks and functions similar to a wind turbine. With wind power the wind rotates a turbine to produce
electricity, whereas with tidal power water rotates a turbine to produce electricity. Other than the installation and occasional
maintenance, tidal turbines can produce abundant amounts of energy from ocean tides. Local governments and companies have
teamed together to install tidal turbines. A group of these tidal turbines can power entire towns.
Reader Tools
Before governments or companies install tidal turbines, the local tides and geography must be studied extensively. Not every
coastal region experiences tides large and powerful enough to warrant building tidal turbines. Nevertheless, numerous regions
around the world have the tides and geography suitable for this fascinating power source. For example, areas of Canada, Western
Europe, and Australia have large tides where tidal power stations could harness energy and create electricity.
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Submit
The sentence that describes a limitation of tidal power as an energy source is:
Not every coastal region experiences tides large and powerful enough to warrant building tidal turbines.Why are there no more nations utilizing tidal power?Although tidal power is a promising renewable energy source, its development is constrained by high production costs, a shortage of suitable locations, and technical difficulties.
Even though they claim to be low-carbon, tidal farms can be bad for the local ecosystem. Marine animals may be hurt by turbines, and migratory species cannot move freely due to barrages. Concerns about the electromagnetic fields and noise produced are also raised, especially with regard to creatures that employ echolocation.
Therefore, the following are some other a few drawbacks of tidal energy:
High construction costs for tidal power plants. Detrimental effect on marine life. Place restrictions. Turbine placement is challenging since the enormous machines disturb the tide they are seeking to harness.Learn more about energy source from
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5. Pick one food chain (with at least 3 organisms) and draw a trophic pyramid below. Include the organism
name, trophic level name and number, and the percentage of energy available at each level.
A trophic level is a place, level, or position within a food web, a food chain, or an ecological pyramid. The producers create the first trophic level as they generate food.
The main consumers make up the second trophic level.
The secondary consumers make up the third trophic level.
The tertiary consumers make up the fourth trophic level.
A food chain example is:Sun, grass, a grasshopper, an owl, a shrewThe grass is the producer in this instance, and the grasshopper is the main consumer.The shrew, or secondary consumer, further consumes the grasshopper.The owl, or the tertiary consumer, in turn eats up the shrew.For more information on food chain kindly visit to
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antibodies are capable of binding up several antigens at once in order to reduce the number of infectious agents that need to be dealt with. this function of antibodies is known as group of answer choices opsonization. neutralization. agglutination. complement fixation.
Antibodies are capable of binding up several antigens in order to reduce infectious agents that need to be dealt with, this function of antibodies is known as agglutination.
Antibodies are proteins that defend you while an unwanted substance enters your body. Produced via your immune device, antibodies bind to these undesirable substances which will put off them out of your gadget.
Antibodies are proteins produced by means of the immune gadget in reaction to contamination. They're an vital part of the frame's defence device as they work to smash sickness-causing organisms and block them from infecting human cells.
Antibodies are positioned in various areas of your frame, such as your skin, lungs, tears, saliva and even breast milk. In reality, high quantities of antibodies are present in colostrum.
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describes the response of auditory nerve fibers that allows for the plausibility of the theory of frequency representation:
The cochlea sends information about sound stimuli to the cochlear nucleus of the brainstem via auditory nerve fibres.
Depending on whether receptor cell population in the cochlea is contacted, the neurons that give rise to these fibres can be split into two categories.
Basically, vibrations (sound signals) are transmitted to the brain via the auditory nerve. Remember that hearing sounds is made possible by several different parts of the ear, not just the auditory nerve. A number of additional ear components are also involved.
Some sensory systems that provide information that is relevant to motor functions are distinguished by a "spatial code" in addition to a "temporal code" because they display characteristics that are tailored to specific spatial directions. Examples include otolith and semicircular canal afferents, as well as muscle spindle afferents.
Complete question:
The volley principle first proposed by Weaver & Bray (1937)
describes the response of auditory nerve fibers that allows for the plausibility of the theory of frequency representation:
a) place code
b) temporal code
c) population code
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which autonomic ganglion, located anterior to the ear, receives parasympathetic axons from the glossopharyngeal nerve (cn ix)?
Parasympathetic, sympathetic, sensory, and motor roots can all be found in the otic ganglion.
All branches of the mandibular division of the trigeminal nerve receive postganglionic parasympathetic secretomotor fibres from the otic ganglion. Additionally, the parotid gland receives sympathetic vasomotor fibres from it. The infratemporal fossa's medial side and the tiny parasympathetic ganglion known as the otic ganglion are both situated just below the foramen ovale. It functions as the glossopharyngeal nerve's functional partner and innervates the parotid gland to stimulate salivation. The auriculotemporal nerve most likely sends signals to the superficial temporal artery from the otic ganglia. Because migraine attacks involve the superficial temporal artery, this is clinically intriguing.
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what is the meaning of reproduction
An organism reproduces an offspring that is biologically similar to the organism through the biological process of reproduction. Generation after generation, reproduction enables and ensures species continuity. It is the primary aspect of life.
There are basically two types of reproduction:
1. Asexual Reproduction
Due to the fact that asexual reproduction does not require the fusing of gametes, the children born are genetically identical to their parents. Asexual reproduction results in less diversified natural creatures. Unicellular organisms frequently use this method of reproduction. There is no need for mating in the procedure, which includes a quick population increase. A lack of genetic variety, however, makes organisms more prone to illnesses and nutritional shortages.
Additional categories for asexual reproduction include:
Binary Fission: The cell divides into two in a process known as binary fission, with each cell retaining a copy of the DNA from the parent cell. Eg - amoeba.Budding: In this process, a tiny bud-like protrusion develops into a new person. Up until it reaches maturity, the protrusion stays connected to the organism. It lives alone as a detached creature. Eg - HydraFragmentation: The parent organism breaks into numerous pieces in a process known as fragmentation, and each piece develops into a new individual. Eg - Planaria. Sporogenesis: A new organism develops from spores in this kind of reproduction. Without fertilization, they can grow and spread by the wind and animals.2. Sexual Reproduction
Male and female gametes are generated to create offspring during sexual reproduction. Either the same person or different people of the opposite sex create these gametes.
Compared to asexual reproduction, this process is typically slow and complex. The resulting organisms are genetically varied. They can therefore change in response to shifting climatic conditions. Many multicellular organisms, including humans, have a sexual form of reproduction.
Reproduction occurs in both Plants and Animals:
1. Plants
Plants can reproduce sexually or asexually. The primary method of plant reproduction is vegetative reproduction. Various types of roots, including corms, stem tubers, rhizomes, and stolons, are vegetatively propagated. Pollination, in which pollen grains from the anther of a male flower are transferred to the stigma of a female flower, is the process by which plants reproduce sexually.
2. Animals
Both sexual and asexual reproduction is common in animals. In order to reproduce sexually, male and female gametes must fuse. Fertilization is the name for this process. You can fertilize internally or externally. The procedure by which the male sperm fertilizes the female egg outside of the female is known as external fertilization. On the other hand, internal fertilization involves the union of male and female gametes within the female body.
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Passive transport is the movement of molecules across the cell membrane without requiring an input of cellular energy. identify which of these options are examples of passive transport.
a. do not require cellular energy to allow molecules to pass through the cell membrane.
b. do not require cellular energy because the kinetic energy of the molecules' movement will drive the movement down the concentration gradient.
c. do not require cellular energy because the molecules are small enough to fit through the membrane.
d. All of the above.
e. a and b
f. None of the above.
Answer:The correct answer is D. None of the above
Explanation:
the process during meiosis that mixes genetic material in both the fathers and mothers germ cells is called
the process during meiosis that mixes genetic material in both the fathers and mothers germ cells is called recombination.
What do independent assortment and recombination in meiosis mean?Recombination, a process that breaks and recombines bits of DNA to create new combinations of genes, takes place during meiosis. Maternal and paternal genes are fragmented during recombination, ensuring that genes assort independently of one another.
What is the recombination process?DNA fragments are broken and recombined during the recombination process to create novel allele combinations. The genetic variety that results from this recombination process at the gene level reflects variations in the DNA sequences of various species.
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The founder effect is an example of _______.
Answer:
The founder effect is an example of genetic drift
explanation:A population has members with the same appearance and features, such members encounter similar problems in the environment they live in. Some members of the population start living in a different place due to some reason. In that new area, they form a colony and start to adapt to different environments. This is called the founder effect. This brings change into sets of genes causing genetic drift.
How many of the following can be used to distinguish a nematode worm from an annelid worm?
1. type of body cavity
2. number of muscle layers in the body wall
3. presence of segmentation
4. number of embryonic tissue layers
5. shape of worm in cross-sectional view • a) one of these
• b) two of these
• c) three of these
• d) five of these
Answer: three of these
Explanation: hope this helps :)
Answer:
C: Three of these
Explanation:
I looked it up.
Which of the following best describes the result of meiosis? Select 3 that apply.
WILL GIVE BRAINLIEST
The result of the process of meiosis is that it produces increased genetic diversity due to crossing over.
The correct option is C.
What is meiosis?Meiosis is a type of cell division that results in the production of gametes or sex cells. Hence. meiosis is a form of cell division that occurs only during sexual reproduction.
During meiosis, the cells of the parent organism which have a pair of chromosomes or diploid number or 2n of chromosomes divide to produce the gametes which have the haploid number or n number of chromosomes.
Hence, the sex cells or gametes produced can fuse to form a zygote that has a pair of chromosomes or diploid number or 2n of chromosomes.
The process of meiosis results in genetic variation as it allows for the crossing over of genes, such that the genes of the offspring show a variation to that of the parents as well as among the offspring.
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