Which factors affect natural selection?
1. inheritance, isolation, adaptation
2. variation, overpopulation, adaptation
3. isolation, overpopulation, speciation
4. variation, inheritance, speciation
Answer:
The correct answer is B) Variation, overpopulation, and adaptation
Explanation:
Edge 2021
Variation, overpopulation and adaptation are the factors that affect natural selection.
What are the factors that affect natural selection?A mechanism that makes the populations of living things to change with time is natural selection. For natural selection to take place, four conditions are required to occur:
ReproductionHeredityVariation in organismVariation in individual charactersSome of the factors that affect natural selection are:
Overpopulation or overproductionVariationCompetitionAdaptationFor natural selection to occur, there should be higher reproductive success as well as variability. Ultimately, natural selection makes individuals within a population to adapt with the changing environment.
Thus, the correct answer is option 2.
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Imagine you could shrink to the scale of the tiny particles that make up matter and move around in a cup of hot chocolate. Write about or draw (and then upload) what you would experience.
Answer:
can you make my friend............
Is this correct? Also ill mark Brainliest.
What are the roles of consumers? Select two options.
1. to create usable food energy
2. to balance the number of producers in an ecosystem
3. to break down dead organisms
4. to eat other organisms
5. to provide energy for producers
The answers are 2 and 4 because consumers kill to eat which balances the number of producers and they eat other organisms
The water inside a teacup is very hot, about 80 degrees Celsius The water inside a large bathtub is warm, about 40 degrees Celsius. Which has the greater average kinetic energy
Which of the following helps to keep the biological membranes in a fluid state?
A.Waxes
B. Cholesterol
C. Phospholipids
D. Water
Answer:
C. Phospholipids
Explanation:
So sorry if I am wrong, but I hope this helps!
If a strand of DNA has 17% T,what percent will
be G? C? A?
Answer:
If a DNA strand has 17% Thymine (T) the percentage of the other nitrogenous bases will be 33% of Guanine (G), 33% of Cytosine (C) and 17% of Adenine (A), according to Chargaff's law.
Explanation:
The percentage of nitrogenous bass in a DNA strand can be established by knowing the percentage of one of the bases present in the molecule, in this case knowing that Thymine corresponds to 17% of bases.
DNA has the nitrogenous bases adenine (A), guanine (G), thymine (T) and cytosine (C). The bases of one chain are matched with the bases of another, according to the complementarity of the nitrogenous bases, where:
Adenine is complemented with thymine A=TGuanine is complemented by cytosine G≡CAccording to this, DNA molecule there is as much T as A, and an equal amount of G and C, and the percentages of nitrogenous bases can be calculated according to Chargaff's rule.
Chargaff deduced that in a DNA molecule the ratio of purine:pyrimidine is 1:1, so there must be the same amount of thymine as adenine and a similar amount of guanine for the cytosine, according to the complementarity of the bases.
Calculating the percentages, according to the law of the base pair, if in a DNA chain there is 17% of T, in the molecule there is:
A = 17 %C = 33%T = 17%G = 33%Total ..... 100%PLSS HELP how is gene knockout similar to gene sequencing?
Answer:
Gene knockout is a technique used to determine the function of a gene that has already been sequenced, which is achieved by analyzing the phenotype of the individual carrying the knockout mutation(s). Moreover, gene sequencing is a technique used to determine the sequence of a given gene, which allows to determine how gene variants (polymorphisms) may be associated with the phenotypes of the target trait.
Explanation:
In genetics, gene knockout is a technique used to trigger mutations in a (already) sequenced gene in order to inactive its function and observe the resulting phenotype for a particular trait. This approach that starts with the inactivation of a given gene and ends with the phenotype is known as reverse-genetics. On the other hand, gene sequencing can be defined as the methodologies/techniques/tools used to determine the nucleotide base pair sequence of a particular gene. The gene knockout technique involves knowing a priori the gene sequence in order to obtain a gene knockout (gene KO). The combination of the information obtained from these techniques can be used to determine how variation (genetic variation) affects the expression of a phenotypic trait.
Help who got a story?
Answer:
Answer down below
Explanation:
Miki was driving a car. She sped up around the 2nd hour mark and then Slowed down around the 4th hour mark.
Plasma membranes allow certain materials to pass through them. Investigate how this property contributes to homeostasis.
Answer:
this
The Plasma membrane maintains the homeostasis throughout a cell because it filters what substances go in and out of the cell. If there is too much of a substance in a cell the plasma membrane quickly disposes it and when there is not enough of a substance in a cell the plasma membrane lets the substance in.
or this
A major role of the plasma membrane is transporting substances into and out of the cell. The plasma membrane is selectively permeable, allowing only certain substances to pass through. ... Cell transport helps cells maintain homeostasis by keeping conditions within normal ranges inside all of an organism's cells.
one of them should have been the answer ;)
Which ends up with half the number of chromosomes?
Answer:
Meiosis end ups with half the no. of chromosomes..
Answer:
Meosis
Explanation:
Meosis 1 ends with 2 diploid cells that end up dividing again into 4 haploid cells. Thus, the end result of meosis is 4 haploid cells with 23 chromosomes each.
How would an increase in nest sites affect a population of pigeons?
Explanation:
The correct answer is B. If there was an increase in nest sites, the pigeon population would increase. This would of course be due to the greater amount of space in which the pigeons could breed and raise their offspring.
4. Take a beaker (jar or jug) with some water and put some drops of red or blue
ink in it. Take a tender twig of any flowery plant with leaves and flowers, preferably
white flowers, and put it in the beaker for 6 to 8 hours. What do you observe? For
further examination cut across its stem and look for the presence of colored water.
Explain your observations.
Answer:
Blue Ink patches are observed on the leaves of the plant. Also, on cutting across the stem of the plant, the red color of the solution is found along the length of the stem.
The above observation shows that the stem of the plant conducts water through its length to the leaves of the plant.
Explanation:
The leaves of plant obtain water and minerals from the soil through the roots of the plant. The water is conducted by the stem of the plant from the roots to the leaves of the plant where they are needed for photosynthesis as well as for cooling the plant. The xylem tissue in plants is responsible for conducting water to the leaves of the plant from the roots of the plant through the stem.
The conduction of water from the roots to the leaves of the plant is maintained by capillary action as well as by transpiration pull. Transpiration pull refers to the pull of water by the transpiration action taking place in the leaves of the pant, whereby water evaporates from the leaves of the plant through the opening in the leaf of the plant.
When the blue ink is added to the water, the colored water is conducted through the stem of the plant to the leaves. On getting to the leaves, the water molecules evaporate leaving behind the colored patches fond on the leaves. When the stem of the plant is cut, the blue color is seen along its length showing that the colored water was conducted through it.
I need help with 10 Please help will give brainliest
Answer:
Red Giant
Explanation:
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Which of the following statements is true?
a) only males can get an X-linked. disorder.
b) only females can get an X-linked disorder.
c) only males can get a Y-linked disorder.
Answer:
The answer is a
Explanation:
X-linked disorders result from mutated genes on the X chromosome. Males, who have only one X chromosome (i.e., they are hemizygous), will fully express an X-linked disorder. On the other hand, females, who have two X chromosomes, will be carriers of the defect in the majority of cases, and so they are usually asymptomatic.
6. The two kinds of cells are Prokaryotes and Eukaryotes. How are they
different? *
Prokaryotes have a nucleus.
Prokaryotes are plant cells.
Eukaryotes have a nucleus.
There is no difference.
Answer:
Eukaryotes have a nucleus.
Identify the independent, dependent, and constant variables for different experiments. A biologist tests different lighting conditions for bacteria. She uses the same number of the same strain of bacteria on each petri dish, with the same type and amount of growing medium on each. Each petri dish is subjected to a different amount of light for a 24-hour period. After this time, the biologist counts the number of bacteria on each petri dish.
Answer:
points
Explanation:
PLEASE HELP. Which organelle is a place for storage of materials within the cell? *
Vacuoles
Nucleus
Mitochondria
Ribosomes
Answer:
vacuole
Explanation:
the nucleus is the control center
the mitochondria is the power house
ribosomes deal with proteins
hope it helps:)
Which optical phenomena are formed by ice crystals?
What are two examples of how the urinary system maintains homeostasis in the human body?
Answer:
In addition to maintaining fluid homeostasis in the body, the urinary system controls red blood cell production by secreting the hormone erythropoietin. The urinary system also plays a role in maintaining normal blood pressure by secreting the enzyme renin.
Explanation:
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Answer:
I LOVE NARUTO so here's a naruto pic
Explanation:
What do we call the freeze dried state that Monerans enter to survive harsh conditions ?
HELPPPPPPP
Answer:
dddďdddddddddddddddddddddd
Answeer: cell state
Explanation:
An amoeba ingests large food particles by
Can someone help on this science question please.
Answer:
D. all of the above
Explanation:
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Answer:
D all of the above
How do the daughter cells compare genetically to the original parent cell after mitosis?
Answer:
after mitosis there are two daughter cells, which are genetically identical to the parent cells.
Explanation:
The daughter cells are identical to the parent cells because the cell copies/ replicates its chromosomes. Then it splits the chromosomes equally so that each daughter cell has a complete set of chromosomes.
Parent cell give rise to daughter cell being genetically identical because of it replicates the DNA, so after mitosis, both daughter cell is genetically identical to the parent cell.
How daughter cell is genetically identical to the parent cell?Mitosis results in the formation of two identical daughter cells, each with the same number of chromosomes as the parent cell.
Meiosis, on the other hand, produces four distinct daughter cells, each with half the amount of chromosomes as the parent cell. Because DNA replicates to complementary to other DNA strands.
The mature cell that is undergoing cell division is known as the parent cell or the mother cell, and the new cells that emerge at the conclusion of the cell division are known as daughter cells.
Therefore due to DNA replication daughter cell is genetically identical to the parent cell after mitosis.
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A homogeneous mixture is known as a(n) A dicolloidal B solution C solvent D suspension
Answer:
A homogeneous mixture is known as B. Solution.
What are the three forces that affect wind?
Answer:
Pressure gradients, the rotation of the earth, and friction are three primary variables that influence the wind. Atmospheric pressure gradients are the ultimate source of wind. The wind blows from high-pressure zones to low-pressure areas.
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Answer: Hi there, I'm so sorry no one answer your question here is what I got
The nervous system makes you thirsty. The integumentary system makes you sweat.
The hypothalamus is part of the nervous system and controls vegetative functions, such as hunger, thirst and body temperature. When you run a race, your body starts to lose fluids due to sweat. At that moment the nervous system (through the hypothalamus) trying to maintain homeostasis in your body signals that you are thirsty.
As already mentioned above, when you participate in a race you start to sweat. This is a reaction of the integumentary system, through the skin, releasing fluids to regulate your body temperature.
Explanation:
A plant can have green (G) or yellow (g) leaves. It can also have a long (K) or
short (k) stem. A scientist is preparing a Punnett square for a dihybrid cross
of a plant with a genotype GGKK. What possible gametes can the plant
produce?
O A. GG, Kk
O B. GK gk
OC. GK, Gk
OD. GK, Gk, gk gk
Why is it important for DNA to remain in the nucleus?
How does DNA determine an organism’s traits
Answer:
Traits are determined by genes. A gene is the basic physical and functional unit of heredity. Genes are made up of DNA. Some genes act as instructions to make molecules called proteins.