Question 1

Which of the following best explains why Arctic hares have shorter ears compared to desert jackrabbits, according to Allen’s Rule?

Accepted Answer

Shorter ears reduce heat loss in cold environments by minimizing surface area exposed to the environment.

Question 2

A population of birds is split by a volcanic eruption, and a small group colonizes a new island. Over generations, the new population exhibits different allele frequencies than the original. Which evolutionary mechanism best explains this change?

Accepted Answer

Genetic drift, specifically the founder effect.

Question 3

Which of the following is an example of analogous structures?

Accepted Answer

Wings of birds and wings of insects.

Question 4

According to Bergmann’s Rule, which of the following patterns would you expect to observe in a widely distributed mammal species?

Accepted Answer

Individuals in colder climates are larger than those in warmer climates.

Question 5

Which of the following best describes the hierarchical organization of animal structure from smallest to largest?

Accepted Answer

Molecules $$\rightarrow$$ macromolecules $$\rightarrow$$ cells $$\rightarrow$$ tissues $$\rightarrow$$ organs $$\rightarrow$$ organ systems $$\rightarrow$$ organism

Question 6

Why do larger animals require more complex internal organ systems for exchange of gases and nutrients compared to smaller animals?

Accepted Answer

Their surface-area-to-volume ratio decreases as size increases, reducing the efficiency of direct exchange across body surfaces.

Question 7

Which of the following statements about the naked mole-rat is supported by research and distinguishes it from typical laboratory mice?

Accepted Answer

Naked mole-rats have a much longer lifespan and exhibit extreme cancer resistance due to high-molecular-weight hyaluronan.

Question 8

Which tissue type is characterized by multinucleated, striated fibers and is responsible for voluntary movement?

Accepted Answer

Skeletal muscle

Question 9

A scientist is engineering mice to overproduce long-chain hyaluronan. Based on the naked mole-rat model, what is the most likely hypothesis being tested?

Accepted Answer

Whether increased hyaluronan length confers cancer resistance and extends lifespan.

Question 10

Which of the following best describes the process occurring at the neuromuscular junction during voluntary muscle contraction?

Accepted Answer

Acetylcholine is released from the motor neuron, binds to muscle receptors, causing depolarization and contraction.

Question 11

Which of the following is a function of the lymphatic system as described in the study materials?

Accepted Answer

Transporting white blood cells and antibodies through lymphatic vessels.

Question 12

Which of the following best distinguishes cartilage from bone?

Accepted Answer

Cartilage is flexible and shock-absorbing, while bone is rigid and load-bearing due to mineralization.

Question 13

Which of the following is a correct pairing of a specialized cell and its primary function?

Accepted Answer

Adipocyte – stores fat for energy.

Question 14

Which of the following best explains why the alveoli in human lungs are composed of a single layer of epithelial cells?

Accepted Answer

To maximize the rate of gas exchange by minimizing diffusion distance.

Question 15

Which of the following is a key difference between homologous and analogous structures?

Accepted Answer

Homologous structures share a common evolutionary origin, while analogous structures do not.

Question 16

Which of the following best describes the role of the pituitary gland?

Accepted Answer

It acts as a master gland, releasing hormones that regulate growth, metabolism, and reproduction.

Question 17

A mutation causes a population of fish to develop longer fins, which increases their swimming speed in open water. Over generations, these fish become more common. Which evolutionary mechanism is primarily responsible?

Accepted Answer

Natural selection, as the trait increases fitness in the environment.

Question 18

Which of the following best explains why the surface-area-to-volume ratio is important for cells and organisms?

Accepted Answer

It determines the efficiency of material exchange relative to metabolic demand.

Question 19

Which of the following is a correct description of the composition of blood?

Accepted Answer

Blood is a connective tissue composed of red and white blood cells, platelets, and plasma.

Question 20

Which of the following best describes the function of glial cells in nervous tissue?

Accepted Answer

They support, nourish, and insulate neurons.

CHAPTER 32

Study Guide - Practice Questions

Study Guide - Flashcards