Q: Which equation correctly represents cellular respiration?

$$\mathrm{C_6H_{12}O_6$} + 6\ \mathrm{O_2$} \rightarrow 6\ \mathrm{CO_2$} + 6\ \mathrm{H_2O} + \text{energy}$$

Question 1

Which of the following best explains how crossing over during meiosis increases genetic variation among gametes?

Accepted Answer

It allows homologous chromosomes to exchange genetic material, creating new combinations of alleles.

Question 2

A population of lizards lives in a stable desert environment with little change over thousands of years. Which type of reproduction would be most advantageous for these lizards, and why?

Accepted Answer

Asexual reproduction, because it allows for rapid population growth without the need for mates and maintains successful genotypes.

Question 3

According to the Red Queen hypothesis, why is sexual reproduction favored in changing environments?

Accepted Answer

It produces genetic variation that allows populations to keep up with evolving parasites and environmental challenges.

Question 4

During early animal development, which event immediately follows fertilization?

Accepted Answer

Formation of the zygote

Question 5

Which of the following best describes the adaptive advantage of metamorphosis in animals such as frogs?

Accepted Answer

It reduces competition for resources between larvae and adults by allowing them to occupy different ecological niches.

Question 6

Which animal is most likely to exhibit internal fertilization, and why?

Accepted Answer

A terrestrial reptile, because internal fertilization protects gametes from desiccation.

Question 7

Parthenogenesis is a form of reproduction in which:

Accepted Answer

Females produce offspring from unfertilized eggs, often resulting in only one sex (e.g., male Komodo dragons due to their sex chromosome system).

Question 8

Which of the following statements about body cavities is correct?

Accepted Answer

A coelomate has a true body cavity completely lined by mesoderm, which allows for the development of complex organs.

Question 9

Why can a sea star zygote produce identical twins, but a snail zygote cannot?

Accepted Answer

Sea stars have indeterminate cleavage, allowing early embryonic cells to develop into complete organisms if separated.

Question 10

Which of the following is a function of the amnion in amniote development?

Accepted Answer

It encloses the embryo in a fluid-filled sac, providing protection from desiccation and mechanical shock.

Question 11

Which equation correctly represents cellular respiration?

Accepted Answer

$$\mathrm{C_6H_{12}O_6$} + 6\ \mathrm{O_2$} ightarrow 6\ \mathrm{CO_2$} + 6\ \mathrm{H_2O} + 	ext{energy}$$

Question 12

Which of the following is NOT a mode of heat loss or gain in animals?

Accepted Answer

Photosynthesis

Question 13

Which statement best explains why endotherms have a higher minimum metabolic rate than ectotherms of the same size?

Accepted Answer

Endotherms must generate internal heat to maintain a constant body temperature, requiring more energy even at rest.

Question 14

Which of the following is an example of countercurrent exchange aiding thermoregulation?

Accepted Answer

Arteries and veins in the legs of a penguin run close together, allowing heat from arterial blood to warm the returning venous blood.

Question 15

Which of the following best describes a hermaphrodite, and in what population density would you expect this trait to evolve?

Accepted Answer

An individual with both male and female reproductive organs; likely to evolve in low-density populations where mates are scarce.

Question 16

Which of the following is a correct match between a worm group and its body cavity type?

Accepted Answer

Flatworms (Platyhelminthes) are acoelomates.

Question 17

Which of the following is a real-world example of a trade-off in evolution?

Accepted Answer

The evolution of bird wings for flight, which reduces the ability to use forelimbs for grasping objects.

Question 18

Which of the following statements about the evolution of eyes is supported by Shubin's argument against irreducible complexity?

Accepted Answer

Eyes evolved through a series of functional intermediate stages, each providing some advantage, rather than requiring all parts to appear at once.

Question 19

Which of the following best describes the difference between monogamous and polygamous mating systems?

Accepted Answer

Monogamous systems involve one male and one female forming a pair bond, while polygamous systems involve individuals having multiple mates.

General Biology Study Guide: Genetics, Reproduction, Development, Metabolism, Animal Diversity, and Evolution

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