Answer:
The correct answer is -
nucleus - reproduction, mitochondria- reproduction, golgi apparatus - waste production, endoplasmic reticulum - growth, ribosomes - growth, lysosomes- waste production, vacuoles - growth, cell membrane - interaction with the environment, chloroplast - uses energy, cell wall - interaction with the environment
Explanation:
A Cell has various organelles with more than one generic function such as the nucleus not just play role in cell reproduction but also plays role in regulating other organelle and cell growth by transcription. Mitochondria produces and provides energy for many functions such as growth, reproduction and substance transport.
Golgi apparatus package proteins and wastes to transfer them out of the cell. The ndoplasmic reticulum modifies the protein produced by ribosomes and helps in growth of the cell. Lysosomes digest waste and cell debris by lysosomal vesicles. Cell membrane and cell wall interact with outer environement.
Which of the following is not a source of atmospheric carbon?
O Fossil fuel burning.
O Dead decaying trees in a forest.
O Oceans releasing CO2 into atmopshere as the water gets warmer.
Plant cell respiration.
Answer:
fossil fuel doesnt need atmospheric carbon for burning
which of the following is true for a eukaryote?
A. it is one of the first life forms to appear on earth.
B. it doesn't have a nucleus and organelles.
C. it must be a multicellular organism.
D it evolved from prokaryotes
Answer:
D it evolved from prokaryotes
Explanation:
let me know if you have any questions
6. What do fungi have in common with animals?
Answer:
Fungi are more like animals because they are heterotrophs, as opposed to autotrophs, like plants, that make their own food. Fungi have to obtain their food, nutrients and glucose, from outside sources. The cell walls in many species of fungi contain chitin.
You will create a molecular clock model for an arthropod gene. Follow these guidelines to make your model:
Your timeline will span from 90 million years ago to the present. The common ancestor in your model is an arthropod that lived 90 million years ago. The gene that you’ll track codes for a protein in the species’ venom.
The DNA sequence you’ll track contains 10 nitrogen bases. You can choose the order of the bases and where the mutations occur.
This gene mutates at a rate of approximately 0.76 base pairs every 17.1 million years. To build your model, calculate the estimated time period it takes for 1 base pair to mutate.
The first time period will only show the common ancestor. At the beginning of the second time period, three lineages will diverge from the common ancestor, each with a different mutation in their gene sequences.
The first and third descendant species will survive for the rest of the timeline. The second descendant species was extinct 50 million years ago.
Calculate how long it will take for one full base pair mutation to occur. Explain your reasoning by constructing a mathematical equation.
Answer:
The mutations occur at a rate of 0.56 base changes every 1 billion years. If this rate stays consistent, the mutation rate can be used to determine when different lineages of a particular species split
Answer:
It takes about 17.1 Million years for a base pair to mutate at a rate of 0.76 base pairs. To get the time it takes for one full mutation to occur, you must divide 17.1 to 0.76 and multiply it by 1. So, (17.1/0.76)×1=22.5. It would take about 22.5 million years for one full base pair mutation to occur. Having this being said, the first descendant with one base pair mutation would change after 22.5 million years from the common ancestor. For the second descendant, it would take 45 million years as 22.5 time 2 is 45. 5 million years later, the second descendant will become extinct while the first descendant survives. The third descendant will take about 22.5×3= 67.5 million years. Now, the first and third descendants will survive while the second descendant is extinct.
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Which part of the
upper respiratory
system is designed to
interact with food and
air?
A. larynx
B. nose
C. pharynx
D. trachea
Answer:
C.Pharynx
Explanation:
Which substance, maple syrup or vegetable oil, has a higher viscosity? Explain how you know the answer.
Answer:
maple syrup
Explanation:
This is because viscosity is simply the resistance of a fluid to flow. A thicker fluid is more resistant than a lighter one. In this case maple syrup is thicker than vegetable oil thus more viscous than it.
A group is considered monophyletic if
A. all members of the group share a common ancestor that is included in the group.
B. all members share homoplastic traits.
C. the group does not contain the most recent common ancestor.
D. not all descendants of the common ancestor are included.
E. it is the most parsimonious grouping.
identify 3 organisms that belong in the same phylum as Protozoans
Answer:
Algae, Protozoa, Heterotrophs
Explanation:
Que tipo de ecosistema tienen los pingüinos emperador y Adelia?
Answer:
Los pingüinos Adelia viven en el continente antártico y en muchas pequeñas islas costeras circundantes. Pasan el invierno en alta mar en los mares que rodean el hielo antártico.
Los pingüinos emperador viven exclusivamente en entornos antárticos gélidos. Prefieren reproducirse durante el invierno, cuando el hielo se congela y se estabiliza. Estos pingüinos suelen crear colonias de reproducción en áreas cercanas a icebergs y acantilados helados, que los protegen de los peores vientos fuertes.
Explanation:
te ayuda esto?
A main strand of a DNA molecule in a protein coding region is transcribed along the following nucleotide sequence: 5' TACATTAAGCCG 3' . Assuming there is no stop codon in this DNA fragment, how many codons does this sequence contain
Answer:
4 codons
Explanation:
In a DNA sequence, codons are in a set of 3 base pairs.
So, we can calculate the number of codons in the sequence by dividing the total number of base pairs by 3.
There are 12 base pairs in the sequence. Divide this by 3:
12/3
= 4
So, there are 4 codons in this sequence.
Jurassic park book summary
Answer:
En una isla remota, un grupo de hombres y mujeres emprende una carrera contra el tiempo para evitar un desastre mundial provocado por la desmedida ambición de comercializar la ingeniería genética. Pero todos los esfuerzos resultarán vanos cuando el inescrupuloso proyecto quede fuera de control y el mundo a merced de unas bestias monstruosas...
Explanation:
What is the Constant of “which bait works best for a fly trap?”
Answer:
Mix scraps of meat (the older, the better) with something sweet. Lots of people swear by using rotten fish or shrimp, which probably work best because they smell so much. Bait for Fruit Flies: Use fruit (the riper, the better), apple cider vinegar, fruit juice, syrup, wine, beer, or any combination
You need to include more of which nutrient in your diet as compared to your
grandmother and why ?
difference between diabetes mellitus and diuresis?? please help
Explanation:
If you have been in EMS long enough, you may well have encountered a patient with diabetes insipidus. Like many, you may have assumed that it is a variant of the common disease diabetes mellitus. Actually, diabetes mellitus and diabetes insipidus are totally unrelated other than the name. The term diabetes is derived from Latin (originally Greek) and means “to go through or siphon,” referring to a large amount of urine produced by the kidneys. The term melitus, in Latin, means “sweet.”
Complete a dichotomous key for the 10 leaves on the common leaves sheet
A dichotomous key might be considered a significantly useful tool to classify organisms. The key provides an easy and fast way for identification by describing different morphological traits, leading you to the correct taxonomic classification.
When you have an organism -or part of it-, and you need to identify it taxonomically, you use a dichotomous key. The key provides morphological descriptions about different taxonomic groups in an easy way to identify these traits in your individual.
It is simple to read a dichotomous key. The term dichotomous refers to how information is provided. You will always have two options (a and b, or 1 and 2), and you will have to choose one of them according to the characteristics of your organism. The key describes specific morphological traits of organisms that are useful for differentiation.
Probably you might need an atlas or a dictionary to understand some of the technical terminologies. You will also need to carefully observe your specimen, to get to distinguish different traits. If the specimen is too small you might need a loup.
Let us analyze simple example using a group of 5 organisms. Let us assume that you do not know their names, and you need to know what is the individual in the red circle (You will find it in the attached files).
Dichotomous key
Statement 1a ----------- The organism is a vertebrate ----------- Frog
Statement 1b------------ The organism is invertebrate ----------- Go to 2
Statement 2a ---------- The organism has a multisegmented
and elongated body, with too many ----- centipede
legs.
Statement 2b ---------- The organism has a relatively short body
and with fewer legs ------------------------------ Go to 3
Statement 3a ----------- The organism has 8 legs ----------------------- Spider
Statement 3b ----------- The organism has 6 legs ----------------------- Ant
As you can see, this a very simple example, but ilustrates how the key provides enough information for you to reah the correct option.
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Answer:
do not use exactly. It will reset your assignment for plagiarism.
Explanation:
what are chromosomes
A. strands I'd DNA wrapped around proteins.
B. The alleles that cause certain traits.
C. Any organism that cause contains DNA
D. A form of virus that infects cells.
Answer:
A. strands I'd DNA wrapped around proteins.
Explanation:
DNA is securely packed within the nucleus by chromosomes, which are thread-like structures. Histone proteins offer structural support for DNA by coiling it around them. During cell division, chromosomes assist in the replication and distribution of DNA. Each chromosome has a centromere, which separates the p (short) and q (long) arms. The centromere is found at the constriction point of the chromosome, which may or may not be the center.
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Select the correct answer from each drop-down menu. Some plants rely on the wind to reproduce. An example is the . It’s important for plants to use the forces of nature to reproduce because they .
Answer:
white tuft of dandelion seeds
They cannot move around freely
I hope this helps
oil-rich countries in the middle east cover about 4% of earth's total land area but posses about 48% of the world's known oil reserves. what is the main reason for high concentration of reserves in this part of the world?
The correct answer is A. Geological processes.
Explanation
Oil is a hydrocarbon of fossil origin by geological processes that transforms large amounts of organic matter deposited on anoxic bottoms of seas or lake areas of the geological past, which were later covered by heavy layers of sediment. This causes organic materials to be transformed into oil by the heat and pressure of the upper layers. However, this phenomenon does not occur in all parts of the earth because in some, as in the case of the Middle East, there were large amounts of organic matter that became an oil reserve. So the correct answer is A.
which best describes a bacterium
Answer:
Bacteria
Bacteria are a type of biological cell. They constitute a large domain of prokaryotic microorganisms. Typically a few micrometres in length, bacteria were among the first life forms to appear on Earth, and are present in most of its habitats. Wikipedia
Explanation:
a member of a large group of unicellular microorganisms which have cell walls but lack organelles and an organized nucleus, including some that can cause disease.
Which of the following best depicts the use of Geographic Information Systems?
City planners using layered maps to decide where to build a park
Wireless routers providing internet signal
Government workers constructing a new interstate highway system
Retail stores advertising a new product
Answer:
City planners using layered maps to decide where to build a park
Explanation:
They are using the GIS data layering method...different aspects ir layers of an area are taken into consideration
For example they would look at schools close by, rivers and soil type. By combining those three characteristics they could make a choice of the best possible area a park should be built.
Unique feature of osmosis is that
(1) energy is required
(2) it involves movement of solutes
(3) it occurs across membranes only
(4) it is seen only in animals
Answer:
I believe the answer is (3)
Explanation:
"Osmosis is a special type of diffusion, namely the diffusion of water across a semipermeable membrane"
"Osmosis only occurs with a semipermeable membrane"
Khan and sciencedirect
Define hypothesis
Thx!
Answer:
a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation.
"his ‘steady state’ hypothesis of the origin of the universe"
Which of the following would be examples of abiotic factors in a mountain river ecosystem?
fish, algae, and sand
sand, water, and fish
sand, water, and minerals
water, fish, and algae
Which of these organelles is NOT in animal cells?
Ribosome
Endoplasmic Reticulum
Cell Wall
answer h and i urgently
no explanation needed
Answer:
h. I think option c growth of an organism in not true
You are part of a research group that is attempting to improve on the beneficial genetic modification of golden rice, to
further reduce global hunger issues. Which of the following is NOT a benefit you would see?
A. Rice crops growing in areas that were previously too harsh to grow in
OB. Cheaper rice crops
C. Larger rice crop yields
D. Rice crops that can also be put in fermenters to produce useable proteins
Answer:
A
Explanation:
The following that is NOT a benefit you would see is Rice crops growing in areas that were previously too harsh to grow in. Option A. This is further explained below.
What is genetic modification?Generally, Genetic modification (GM) refers to a technique that allows for the introduction of foreign DNA into an organism's genome.
In conclusion, One drawback you would not experience is the cultivation of rice in climates where it was previously unfeasible to do so.
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When does puberty occur? What causes the changes that occur during puberty?
Answer:
When does puberty start? Puberty starts when changes in your child's brain cause sex hormones to start being released from the gonads, which are the ovaries and testes. This typically happens around 10-11 years for girls and around 11-12 years for boys.Skip
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What is puberty?
Puberty is the time when your child moves through a series of significant, natural and healthy changes. These physical, psychological and emotional changes are a sign that your child is moving from childhood towards adulthood.
Changes in puberty include:
physical growth and development inside and outside children’s bodies
changes to children’s sexual organs
brain changes
social and emotional changes.
When does puberty start?
Puberty starts when changes in your child’s brain cause sex hormones to start being released from the gonads, which are the ovaries and testes.
This typically happens around 10-11 years for girls and around 11-12 years for boys.
But it’s normal for the start of puberty to range from 8-13 years in girls and 9-14 years in boys.
There’s no way of knowing exactly when your child will start puberty. Early changes in your child’s brain and hormone levels can’t be seen from the outside, so it’s easy to think that puberty hasn’t started.
Puberty can be completed in about 18 months, or it can take up to 5 years. This range is also completely normal.
Girls: key physical changes in puberty
In girls, these are the main external physical changes in puberty that you can expect.
Around 10-11 years
Breasts will start developing. This is the first visible sign that puberty is starting. It’s normal for the left and right breasts to grow at different speeds. It’s also common for the breasts to be a bit tender as they develop. If your child wants a bra, a soft crop top or sports bra can be a good first choice.
A growth spurt occurs. Some parts of the body – like the head, face and hands – might grow faster than limbs and torso. This might result in your child looking out of proportion for a while. On average, girls grow 5-20 cm. They usually stop growing at around 16-17 years.
The body shape will change. For example, a girl’s hips will widen.
The external genitals (vulva) and pubic hair will start to grow. Pubic hair will get darker and thicker over time.
Around 12-14 years (about two years after breast development starts)
Hair will start growing under the arms.
A clear or white discharge from the vagina starts several months before periods start. If the discharge bothers your child, you could suggest your child uses a panty liner. If your child says it’s itchy, painful or smelly, consult your GP.
Periods will usually start within 2 years of breast growth starting, but can take up to 4 years.
Boys: key physical changes in puberty
In boys, these are the main external physical changes in puberty that you can expect.
Around 11-12 years
The external genitals (penis, testes and scrotum) will start to grow. It’s normal for one testis to grow faster than the other. You can reassure your child that men’s testes usually aren’t the same size.
Pubic hair will start to grow. It will get darker and thicker over time.
Around 12-14 years
Your child will have a growth spurt. Your child will get taller and their chest and shoulders will get broader. Some parts of your child’s body – like their head, face and hands – might grow faster than their limbs and torso. This might result in your child looking out of proportion for a while. On average, boys grow 10-30 cm. They usually stop growing at around 18-20 years.
It’s common for boys to have minor breast development. If your child is worried by this, it might help your child to know it’s normal and usually goes away by itself. If it doesn’t go away or if the breasts seem to be growing a lot, consult your GP.
Around 13-15 years
Hair will start growing on other parts of your child’s body – under the arms, on the face and on the rest of the body. Leg and arm hair will thicken. Some young men will grow more body hair into their early 20s.
The hormone testosterone is produced, which stimulates the testes to produce sperm.
Your child might start having erections and ejaculating (releasing sperm). During this period, erections often happen for no reason at all. Just let your child know that this is normal and that people don’t usually notice. Ejaculation during sleep is often called a ‘wet dream’.
Around 14-15 years
The larynx (‘Adam’s apple’ or voice box) will become more obvious. Your child’s larynx will get larger and their voice will ‘break’, eventually becoming deeper. Some boys’ voices move from high to low and back again, even in one sentence.
Answer:
For girls, puberty typically occurs between the ages of nine and thirteen
For boys, puberty typically occurs between the ages of ten and fifteen.
An increase in hormones – estrogen and progesterone in girls and testosterone in boys – causes the changes that happen during puberty.
Explanation:
If a cell has 10 chromosomes when it begins mitosis, how many will it have immediately afterword?
Answer:
Explanation:
Therefore, there will be two daughter cells at the end of mitosis. Each will have 10 chromosomes, if the parent cell has 10. The chromsomes will not have sister chromatids because after mitosis, the duplicated pairs have separated into the two daughter cells. The cells will each be diploid, just as the parent cell was.
Explanation:
If a cell has 10 chromosomes when it begins mitosis, there are 15 will have immediately afterword.
Amylose is a form of starch made up of α glucose monomers that are bound by 1– 4 linkages.
Describe how the molecule would be affected if the subcomponents were joined by 1–6 linkages instead.
Explain how this might affect the function of the resulting molecule.
Answer: Carbohydrates usually function as energy storage or structural materials, and are composed of monosaccharides (simple sugars). All monosaccharides have three carbon atoms with a carbonyl group attached to one of the carbons, and hydroxyl groups attached to the remaining two. Monosaccharides are the primary fuel for metabolic processes, so we need the monosaccharides in carbohydrates to fuel our metabolic processes, making it an important part of our diet. If the subcomponents were joined by 1-6 linkages instead of 1-4 linkages, it wouldn't be called amylose, it would change to glycogen, making it less soluble.
If the subcomponents of amylose were joined by 1-6 linkages instead of 1-4 linkages, the resulting molecule would have a branched structure instead of a linear one.
Amylose is a type of polysaccharide that is found in starch. It is made up of alpha glucose monomers that are joined together by alpha-1,4 glycosidic bonds.
If subcomponents were joined by 1-6 linkage if will result into a branched molecule named as Glycogen.
-The branched structure would make it easier for enzymes to break down the molecule, which could affect how quickly it is digested and how it is used for energy.
Therefore, the change in the linkage would result in a different structure and function of the molecule (glycogen) making it less soluble .
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Emulsifiers are Multiple Choice molecules with two nonpolar ends that can be used to disperse lipids into polar liquids such as water. molecules with a polar end and a nonpolar end that can be used to disperse lipids into polar liquids such as water. molecules with two polar ends that can be used to disperse lipids into polar liquids such as water. proteins that transport nonpolar substances in the bloodstream. proteins that transport polar substances in the bloodstream.
Answer:
molecules with a polar end and a nonpolar end that can be used to disperse lipids into polar liquids such as water.
Explanation:
The process of emulsification is very important in science. An emulsifier is a substance that is used to disperse hydrophobic substances in a polar substance such as water.
An emulsifier has a hydrophillic head and a hydrophobic tail. The hydrophillic head dissolves in a polar substance such as water while the hydrophobic tail dissolves in the lipid thereby dispersing the lipid in water.
