Summary
The life history of a species is the pattern of survival and reproduction events typical for a member of the species (essentially, its lifecycle).
Life history patterns evolve by natural selection, and they represent an "optimization" of tradeoffs between growth, survival, and reproduction.
One tradeoff is between number of offspring produced and the amount of energy (both physical resources and parental care) put into each offspring.
How is an RNA molecule different from a DNA molecule?
RNA is single stranded and composed of nitrogenous bases, a phosphate group, and a pentose sugar.
RNA is single stranded and composed of nitrogenous bases, a phosphate group, and a tetrose sugar.
RNA is a double-stranded helix and composed of nitrogenous bases, a fatty acid, and a pentose sugar.
RNA is single stranded and composed of nitrogenous bases, an amino acid, and a hexose sugar.
Answer:
RNA is single-stranded and composed of nitrogenous bases, a phosphate group, and pentose sugar.
Explanation:
RNA is different from DNA because instead of having two matching bases; it is only made of one strand of nitrogenous bases. These bases are attached to the phosphate, which holds the whole strand of RNA together. The sugar acts as a carrier for the bases. The sugar in RNA is known as ribose and contains 5 carbon molecules. This is why it is called pentose sugar.
A study is done on a group of families in Sweden that are segregating a genetic disorder. A statistical estimate of whether two genes, or a gene and a disease gene, are likely to be located near each other on a chromosome (called Lod-score analysis) indicates that the gene involved in the disorder shows a strong likelihood of linkage with a particular DNA marker locus. However, a second study done in Italy with other families segregating the same genetic disorder results in lod-score values that strongly indicate the lack of linkage between the gene and the same DNA marker locus. Assuming that both studies were performed appropriately, what is the most likely explanation for the different outcomes
Answer:
This disorder is caused by mutations in either of two different genes; one of these genes is linked to the DNA marker locus and the other gene is not.
Explanation:
A gene marker (also known as a molecular marker) is defined as a particular DNA sequence that has a specific physical location on a given chromosome. The gene markers are always physically linked with genes of interest, thereby they are useful for identifying patients affected by a given disease and/or a particular phenotypic trait. In this case, in the first study, genetic variation of the marker has been shown to be useful to map one locus that is associated with the disease phenotype. However, in the second study, a second locus that is not linked to the marker can segregate independently, thereby showing different results from the first study (in this case, it is imperative to develop a new genetic linkage analysis to discover genetic markers linked to the second gene, which is also responsible for the disease phenotype).
True or False: As ATP is used in the myofilaments, mitochondrion, and cytoplasm of muscle cells, heat is released. The circulatory system takes heat to the skin’s surface to dissipate to the environment. People sweat to help cool down.
Answer:
- As ATP is used in the myofilaments, mitochondrion, and cytoplasm of muscle cells, heat is released. True
- The circulatory system takes heat to the skin’s surface to dissipate to the environment. True
- People sweat to help cool down. True
Explanation:
Muscle contraction occurs when myosin heads bind to actin to pull it inwards. The energy for muscle contraction is provided by the hydrolysis of ATP molecules. ATP hydrolysis also provides energy for cellular processes in the mitochondria and cytoplasm of muscle cells. During ATP hydrolysis, heat is released, thereby the increase in ATP hydrolysis increases heat production (approx. 60% of the energy released from ATP hydrolysis produces metabolic heat). Moreover, on hot days, the cardiovascular system composed of the heart and blood vessels dissipates heat through the blood flowing in veins and arteries, which moves closer to the skin surface (and therefore heat is lost). Finally, sweating refers to the process of exocrine secretion of the sweat glands that release salty water through the pores of the skin. As sweat evaporates, it helps to cool down the body and regulate its temperature.
Select the correct answer.
Why do plants excrete more carbon dioxide at night than during the day?
A.
Cellular respiration occurs only at night and not during the day.
B.
Cellular respiration occurs at a faster rate at night than during the day.
C.
Photosynthesis uses some of the carbon dioxide released during the day.
D.
The light-independent reaction of photosynthesis that releases carbon dioxide occurs at night.
Answer:
D
Explanation:
because they cannot do photosynthesis at night.
Answer:
The answer is C. Photosynthesis uses some of the carbon dioxide released during the day.
Explanation:
Describe hydrophobic interactions, the conditions under which they occur, and the probable influence they have on protein structure. Group of answer choices These are nonpolar side chains of amino acids that tend to associate to form hydrophobic clusters usually away from the protein surface. These are nonpolar side chains of amino acids that tend to destroy hydrophobic clusters away from the protein surface. These are polar side chains of amino acids that tend to associate to form hydrophobic clusters usually close to the protein surface. These are polar side chains of amino acids that tend to destroy hydrophobic clusters close to the protein surface.
Answer:
Nonpolar side chains of amino acids tend to associate to form hydrophobic clusters usually away from the protein surface.
Explanation:
Hydrophobic interactions are defined as the relationship between the low water soluble molecules named hydrophobes and water. They contains a long chain of carbon atoms and are usually considered as a nonpolar molecules.
They occur when the non polar amino acids are associated to produce the hydrophobic clusters that are usually away from the surface of the protein.
Which of the following diseases is not caused by viruses?
Measles
Chickenpox
AIDS
Malaria
Answer:
malaria isn't caused by bacteria
Explica como crees que se originó la vida sobre el planeta tierra
How do I make a Punnet Square without knowing if traits are Dominant or Recessive? I cannot refer to the parents of the current generation, so I have to rely on that generation to create a theoretical next generation.
If you are referring to a previous generation, that would probably mean that the traits they have are the dominant ones
Explanation:
if you know all the traits possible, then the ones the parents have of a previous generation are most likely the dominant ones, from there, you can hopefully figure out another generation. could you attach a picture if this didn't help? thanks
What cycle of replication is used by the common cold virus?
A: Dormant cycle
B: Replication cycle
C: Lytic cycle
D: Lysogenic cycle
Answer:
C
Explanation:
The lytic cycle involves the reproduction of viruses using a host cell to manufacture more viruses; the viruses then burst out of the cell. The lysogenic cycle involves the incorporation of the viral genome into the host cell genome, infecting it from within.
The common cold virus is replicated using the lytic cycle, by introducing its genome into the host and using its cellular machinery, hence option c is correct.
How common cold virus replicate?The common cold virus is replicated by using the lytic cycle, in which the virus introduces its genome into the host genome and uses all the replicating machinery of the virus.
The lysogenic cycle is different from the lytic cycle in which the viral genome replicates on its own and does not integrate its genome into the host genome.
After replicating its genome with the host genome, the viral genome is excised from the host genome and assembled into new viral particles for infecting other host cells. The new viral particle lysed the host cell and spread to other cells.
Therefore lytic cycle is used by the common cold virus, hence option c is correct.
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What process facilitates locomotion for the ovum?
Question 6 options:
a. Once the ovum leaves the ruptured follicle it is captured by the uterus and then directed into the Fallopian tube, where it is pushed along towards the oviducts.
b. Once the ovum leaves the ruptured follicle it is captured by the fimbriae and then directed into the Fallopian tube, where it is pushed along towards the uterus via cilia.
c. Once the ovum leaves the ruptured follicle it is fully matured and propels itself into the Fallopian tube, where it moves along towards the uterus.
d. Once the ovum leaves the ruptured follicle it is captured by the cervix and then directed into the Fallopian tube, where it is pushed along towards the uterus via cilia.
The correct answer is B. Once the ovum leaves the ruptured follicle it is captured by the fimbriae and then directed into the Fallopian tube, where it is pushed along towards the uterus via cilia.
Explanation
Ovulation is a process that occurs during the menstrual cycle that occurs around day 14 of the cycle. In the ovulation process, the eggs go through different places before reaching the uterus (their final destination). The first step is when the egg leaves the broken follicles. The second step is when it is taken to the fallopian tubes (place where fertilization occurs) through the fimbriae. The third step is when the egg uses the cilia to reach the uterus.
Which of these is an example of an adaptive )or specific) immune response
your body's internal feedback loops work by responding to???
A) information from the external environment
B) hormones from the pineal gland
C) changes in the internal environment
D) messages sent by the brain to body organs
Answer:
Option C
Explanation:
Chemosynthesis _______. Question 11 options: uses energy derived from hydrocarbons and hydrogen sulfide in place of solar energy produces carbohydrates and sugars occurs around hydrothermal vents near the oceanic ridge system Both a and c are correct. All of the above are correct.
Answer:
The answer is all of the above are correct.
Explanation:
Chemosynthesis occurs in bacteria and other organisms and involves the use of energy released by inorganic chemical reactions to produce food. All chemosynthetic organisms use energy released by chemical reactions to make a sugar, but different species use different pathways. For example, at hydrothermal vents, bacteria oxidize hydrogen sulfide and add carbon dioxide and oxygen to produce sugar, sulfur, and water:
CO2 + 4H2S + O2 ⇒ CH20 + 4S + 3H2O.
Chemosynthesis is the process by which food (glucose) is made by bacteria using chemicals as the energy source, rather than sunlight. Chemosynthesis occurs around hydrothermal vents and methane seeps in the deep sea where sunlight is absent. During chemosynthesis, bacteria living on the seafloor or within animals use energy stored in the chemical bonds of hydrogen sulfide and methane to make glucose from water and carbon dioxide (dissolved in seawater). Pure sulfur and sulfur compounds are produced as by-products.
The point in a eukaryotic cell cycle at which DNA condenses to from visible chromosome?
Answer:
Prophase
Explanation:
There are different stages in the eukaryotic cell cycle. Different cellular occurrences are found in each of this stages. The stages include; prophase, metaphase, anaphase, telophase etc.
Prophase, which is the first division stage, is characterized by the dissociation of the nuclear membrane, tightening of DNA coils called chromatin by condensin proteins (condensation) to form X shaped visible chromosomes.
(ii) Fish use their gills as a gas exchange surface.
Suggest three ways in which fish gills are adapted for efficient gas exchange.
(3)
1
2
3
Since the reason of the large surface area of the gills, gas exchange in fish is very efficient. the blood capillaries' large surface area in each gill filament The outer layer of the gill filaments as well as the capillary walls are only one cell thick due to the short distance required for diffusion.
What are gills?A gill is a respiratory organ found in many aquatic organisms that allows them to extract dissolved oxygen from water and expel carbon dioxide.
Some species' gills, such as hermit crabs, have adapted to allow them to breathe on land as long as they are kept moist.
Water runs over the gills as the fish opens its mouth, and blood in the capillaries picks up oxygen dissolved in the water. The blood then circulates through the fish's body to deliver oxygen, just as it does in humans.
Fish have gills, which allow them to "breathe" oxygen from the water. Water enters the mouth, travels through the gills, and exits the body via a special opening.
As the water passes over them, the gills absorb oxygen from it. The body of a fish is stream-lined.
Thus, these are the ways, in which fish gills are adapted for efficient gas exchange.
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In this assignment, you will expand your knowledge of muscle structure and function by exploring muscle strength and contraction. Then, you will use what you learn to answer some follow-up questions.
Read the article and use the information to answer the following questions.
Strongest Muscle
Name the four ways muscle strength can be measured and briefly describe each.
Answer:
Absolute strength measures maximum force.
Dynamic strength measures repeated motions.
Elastic strength measures exertion of force rapidly.
Strength endurance measures fatigue resistance.
Explanation:
im megaminds child
Absolute strength measures maximum force. Dynamic strength measures repeated motions. Elastic strength measures exertion of force rapidly. and Strength endurance measures fatigue resistance.
What is Muscle strength ?Physical strength and muscular endurance share some characteristics, they also differ significantly. Your ability to apply force or lift weights is a measure of your muscular strength. Using heavier weights for fewer repetitions helps develop muscular strength.
The term "muscular endurance" describes a muscle's capacity to endure prolonged periods of repeated contractions against opposition.
Long-distance running, cycling, or swimming, as well as bodyweight exercises and circuit training, are exercises that increase muscle endurance.
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Briefly explain what happens during Meosis 1.
Answer:
Explanation:
During meiosis one cell, divides twice to form four daughter cells. These four daughter cells only have half the number of chromosomes of the parent cell. they are haploid. Meiosis produces our sex cells or gametes. (eggs in females and sperm in males)
Complete the table by filling in the missing information. Use these choices:
frameshift
substitution
7. UGU-CCG-GAA-CGA
UGC-CGG-GAA-CGA
8. GAA-CGU-AGC-GGU
GAU-CGU-AGC-GGU
9. UGU-UUC-CCU-UAA
UGU-UCC-CUU-AA
Answer:
7. Substitution mutation
8. Substitution mutation
9. Frameshift mutation
Explanation:
A substitution mutation is any kind of mutation that involves replacement of one or more nucleotide base by another in a sequence.
A frameshift mutation, on the other hand, is a mutation that changes the reading frame of the sequence. Two types of mutations cause frameshift viz: insertion and deletion mutation.
In the following sequences, mutation has occured as follows:
7. UGU-CCG-GAA-CGA to UGC-CGG-GAA-CGA - Substitution mutation has occured because nucleotides C and G has replaced C and U in the first and second codons respectively.
8. GAA-CGU-AGC-GGU to GAU-CGU-AGC-GGU- A substitution mutation because nucleotide U has replaced A in the first codon.
9. UGU-UUC-CCU-UAA to UGU-UCC-CUU-AA - A frameshift mutation because nucleotide U has been removed from the second codon, hence, causing a change in the reading frame.
If the gene sequence of DNA is A T T C G A C T C G what will the complementary mRNA sequence be that is made during transcription?
Answer:
U A A G C U G A G C
Explanation:
The complementary bases in RNA are the same as DNA with G-C (guanine to cytosine).
But, they are different in that RNA has A-U (adenine to uracil) instead of A-T (adenine to thymine).
Using these RNA base pairs of G-C and A-U, create the complementary mRNA sequence:
A T T C G A C T C G
Translate:
U A A G C U G A G C
So, the complementary mRNA sequence will be U A A G C U G A G C
Which commercial fishing technique is associated with excessive bycatch?
O A. Long-line fishing
O B. Handline fishing
O C. Trolling
O D. Seining
HELP
Answer: D. Seining
Explanation:
Seine fishing refers to a method of fishing whereby a fishing net, which is referred to as a seine, is hanged vertically in the water.
Seining is typically done in water that is less than 12 feet in depth and it works well when the aquatic plants and the algae doesn't disturb the water. In the seining method, a large net on two poles is used and it's a commercial fishing technique is associated with excessive bycatch.
Answer:
Long line fishing
Explanation:
It gathers more than seining
What factor is described as sexual
selection?
A. non-random mating
B. migration
C. small populations
D. natural selection
Answer:
D Natural Selection
Explanation:
Species choose mates to reproduce with naturally.
.Origin of species was given by
Answer:
Charles Darwin
Explanation:
The graph shows the history of human population growth
Answer:
exponential growth, c.
Exponential growth is iconic for ramping up, resulting in a near vertical line by the time its really going.
What questions do you have about skin and skin color?
Answer:
nothing I have☺️☺️☺️☺️☺️☺️☺️☺️☺️
Which of the following is a heterotroph?
*cyanobacteria
*gopher
*fir tree
*dandelion
What organelle must be present for a cell to be classified as eukaryotic?
nucleus
chromosomes
chloroplasts
ribosomes
external structure of Amoeba
Answer:
Structure of amoeba primarily encompasses 3 parts – the cytoplasm, plasma membrane and the nucleus. The cytoplasm can be differentiated into 2 layers – the outer ectoplasm and the inner endoplasm. The plasma membrane is a very thin, double-layered membrane composed of protein and lipid molecules.
Explanation:
Organizing a higher trophic levels tend to be fewer in number than those at lower tropic levels (true or false?
Answer:
True
Explanation:
__________ will increase soil nitrates, while ___________ will decrease soil nitrates.
A. Fast growing crops, heavy rains
B. Decomposers, lightning
C. Animal manure, fast growing crops
D. Denitrifying bacteria, Nitrifying bacteria
Answer:
A. Fast growing crops, heavy rains
Explanation:
Fast growing crops will increase soil nitrates, while heavy rains will decrease soil nitrates.
Animal manure has organic waste containing nitrogen that acts as a source of nitrate in the soil and growing crops absorb nitrate from the soil. Thus option C is correct.
What is nitrate?Nitrate is an organic compound of nitrogen that is present in the fertile soil and absorbed by the plants. The Source of nitrate is humus and fertilizer. Humus is obtained from animal manure, and dead and decaying animal and plant bodies.
Fast-growing crops absorb the nitrate from the soil and use it for development and growth such that nitrate decrese in soil. So option C is correct.
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Now look at the volcano map what type of boundary tends to give rise to volcanic activity
Answer:
there's no map but
Explanation:
There are about 1,500 potentially active volcanoes worldwide, aside from the continuous belts of volcanoes on the ocean floor at spreading centers like the Mid-Atlantic Ridge. About 500 of those 1,500 volcanoes have erupted in historical time
Answer:
Volcanoes occur primarily on convergent boundaries, specifically oceanic-continental convergent boundaries.
Explanation:
exact answer
