FREE AP Biology Question and Answers
In humans, the Krebs cycle takes place in the
Explanation:
In the matrix of the mitochondria, the Krebs cycle takes place. Don't forget to go over each stage of aerobic respiration's website. The first stage of aerobic respiration, glycolysis, takes place in the cytoplasm. The inner mitochondrial membrane is where the electron transport chain is located. As protons (H+ ions) travel from the intermembrane space to the mitochondrial matrix, oxidative phosphorylation takes place.
Which of the following statements most accurately describes why a population is referred to as the evolutionary unit?
Explanation:
Because changes in population genetic makeup can be tracked throughout time, populations can be thought of as evolutionary units.
Which of the following DOES NOT describe a bacterial trait?
Explanation:
Prokaryotes, which include bacteria, don't have membrane-bound organelles like eukaryotes do. Ribosomes, a cell wall, and circular double-stranded DNA are all components of bacteria.
A guinea pig cross is performed by a scientist using two animals with identical black coats. White hair coat is subordinate to black hair coat. One-fourth of the offspring have white coats, compared to three-quarters who have black coats. Most likely, the parents' genotypes were
Explanation:
Utilize the ratio of the progeny provided in the question and go backward to discover the genotype of the parents. Black-haired guinea pigs outnumber white-haired guinea pigs 3:1. Therefore, the children were BB, Bb, Bb, and bb. To determine the parents' genotypes, create a Punnett square now. Bb and Bb are the parents.
A volcanic eruption decimates a sizable island. With the exception of the group's largest male and female horses, the majority of the horses perish. They remain alive, procreate, and maintain the population. Given that weight is highly heritable and that the distribution of weights resembles a binomial distribution, the following generation's kids should have
Explanation:
Due to the death of all the lighter horses in the first population, the mean weight of the progeny in the following generation will be greater than the mean weight of the original population. Weight will consequently be distributed normally, with the heavier end (to the right of the graph).
The endocrine system uses a variety of feedback mechanisms to maintain homeostasis. Which of the following best describes favorable criticism?
Explanation:
A greater response to a stimulus is known as positive feedback.
One distinction between the two types of cellular reproduction—meiosis and mitosis—is that in meiosis
Explanation:
Sister chromatids in mitosis separate during the metaphase of that cell cycle, whereas in meiosis, they separate during the second metaphase of that cell cycle (Meiosis II).