BIOLOGY HIGH SCHOOL

Which cell cycle checkpoint determines whether the DNA has been replicated correctly? a. the cell growth checkpoint b. the DNA synthesis checkpoint c. the mitosis checkpoint d. the G2 checkpoint

Answers

Answer 1
Answer: b. The DNA synthesis checkpoint

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Which of the following is responsible for transmitting an impulse across a synapse to another cell?a. Dendrites
b. Axons
c. Neurotransmitters
d. Thresholds

Answers

The appropriate response is neurotransmitters. It is a compound substance that is discharged toward the finish of a nerve fiber by the entry of a nerve motivation and, by diffusing over the neural connection or intersection, makes the exchange of the drive another nerve fiber, a muscle fiber, or some other structure.
The option which is responsible for transmitting an impulse across a synapse to another cell is C. neurotransmitters. The name itself says it all - a neurotransmitter transmits impulses through neurons, and thus an effect is created in a person's brain and body. The other options do other things that are not mentioned in this question, so they aren't correct answers here.

N many ecosystems, smallerpoisonous animals develop a bright coloration. Predators learn to steer clear of these colors, lest they get a mouthful of venom. Over time, other non-poisonous species may develop the same coloration, cashing in on the nasty reputation of the poisonous species. This adaptation is known by which name?

Answers

Answer:

Bayesian mimicry

Explanation:

Batesian mimicry is a form of mimicry where a harmless species has evolved to imitate the warning signals of a harmful species directed at a predator of them both. It is named after the English naturalist Henry Walter Bates, after his work on butterflies in the rainforests of Brazil.

Answer:

Mimicry

Explanation:

Mimicry can described or explained as the process whereby one organism copy the action of others and do exactly the same as that copied organism.

This is usually done when the action copied from the organism is useful in escaping from predators or being seen by other organisms as a predator and allow it to have access to the available resources.

In this case, when other organism copy the bright coloration of that small poisonous organism to drive away other organism, it is called mimicry.

in a particular flowering plant species, orange flower color trait has simple dominance over the yellow flower color trait. in a population that is in hardy-weinberg equilibrium for that trait, sixteen percent of a population show yellow-flower phenotypes. what percent of the population is heterozygous for the flower color alleles?

Answers

In a population that is in Hardy-Weinberg equilibrium, the frequency of the dominant allele (in this case, for orange flowers) is p and the frequency of the recessive allele (for yellow flowers) is q. 48% of the population is heterozygous for the flower color alleles in this plant species under Hardy-Weinberg equilibrium. In this particular flowering plant species, orange flower color shows simple dominance over yellow flower color.

Given that 16% of the population show yellow-flower phenotypes in a population that is in Hardy-Weinberg equilibrium, we can calculate the percent of the population that is heterozygous for the flower color alleles.
Step 1: Determine the frequency of the recessive allele (q)
Since 16% of the population has yellow flowers (recessive phenotype), the frequency of the recessive homozygous genotype (qq) is 0.16. To find the frequency of the recessive allele (q), we take the square root of 0.16, which is 0.4.
Step 2: Determine the frequency of the dominant allele (p)
Using the Hardy-Weinberg equilibrium equation, p + q = 1, we can calculate the frequency of the dominant allele (p). Since q = 0.4, then p = 1 - 0.4 = 0.6.
Step 3: Calculate the percentage of heterozygous individuals (2pq)
To find the frequency of the heterozygous genotype (2pq), we multiply 2 by the frequency of p and q: 2 x 0.6 x 0.4 = 0.48.
Therefore, 48% of the population is heterozygous for the flower color alleles in this plant species under Hardy-Weinberg equilibrium.

For more questions related to Hardy-Weinberg equilibrium, refer to:

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In an oil-based, nonpolar environment, phospholipids would arrange themselves so that they __________.

Answers

The answer would be : would stay together but in a reverse orientation, with their tails projecting outward.

Hope this helps !

Photon
Do you have an answer choice? If so please put and I would love to help you.

Which is the term applied to the repeating stages that a cell experiences, including cell division?. . A.. Mitosis. . B.. Meiosis. . C.. S phase. . D.. Cell cycle.

Answers

I believe that the answer should be D. Cell cycle.

Punnett square are used to show possible combinations of alleles or to predict the probability of a trait occurring in offspring. A pansy that is homozygous for purple flowers (PP) is crossed with a pansy that is homozygous for pink flowers (pp). Which genotypes will be included for the offspring in the Punnett square for this cross?

Answers

Answer:

The correct answer would be Pp.

The genotype of one parent is PP. Thus, it will produce only one type of allele, that is, P.

Similarly, the genotype of another parent is pp. Thus, it will produce only one type of gamete, that is, p.

The cross would produce offspring with only one type of genotype, that is, heterozygous Pp.

The phenotype of all the offspring will be purple as it is a dominant trait.

When we cross PP x pp we obtain:

Pp + Pp + Pp + Pp (we obtain four identical genotype).

Pp (heterozygote flower) is the Only genotype when we cross two different homozygotes.

The phenotype will be the purple flower since it is the dominant genotype.
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