Question 1

Which of the following statements best explains the 'two-fold cost of sex' in animal reproduction?

Accepted Answer

Sexual females produce half as many daughters as asexual females, reducing the rate of population growth.

Question 2

In honeybees, males (drones) are produced by parthenogenesis. What is the ploidy of these drones, and which equation represents their chromosome number if the diploid number is $$2n$$?

Accepted Answer

Haploid; $$n$$

Question 3

Which mechanism of asexual reproduction involves the breaking of the body into several pieces, each capable of developing into a complete adult?

Accepted Answer

Fragmentation

Question 4

A lizard species exhibits parthenogenesis where chromosome doubling occurs after meiosis, resulting in diploid zygotes. Which process is responsible for restoring diploidy?

Accepted Answer

Post-meiotic doubling of chromosomes

Question 5

Which of the following is TRUE regarding gametogenesis in mammals?

Accepted Answer

Spermatogenesis in males is a continuous process throughout adult life.

Question 6

Which reproductive strategy is most likely to result in offspring that are genetically identical to the parent?

Accepted Answer

Asexual reproduction via parthenogenesis

Question 7

In Daphnia, what environmental change typically triggers the switch from asexual to sexual reproduction?

Accepted Answer

Onset of late summer/early fall

Question 8

Which of the following best describes simultaneous hermaphroditism?

Accepted Answer

An individual possesses both male and female reproductive systems at the same time.

Question 9

Which equation correctly represents the chromosome number in mature sperm cells produced by spermatogenesis, if the diploid number is $$2n$$?

Accepted Answer

$$n$$

Question 10

Which of the following is a key advantage of internal fertilization over external fertilization?

Accepted Answer

It provides greater protection and parental care for developing embryos.

Question 11

A sea star loses one of its arms. What biological process allows the sea star to regrow the lost arm?

Accepted Answer

Regeneration

Question 12

Which of the following reproductive systems is NOT correlated with the phylogenetic position of an animal?

Accepted Answer

Complexity of reproductive system

Question 13

Which of the following is a real-world example of sequential hermaphroditism?

Accepted Answer

Blue-headed wrasse changing from female to male as it ages

Question 14

Which of the following equations represents the chromosome number in a mature egg cell (ovum) produced by oogenesis, if the diploid number is $$2n$$?

Accepted Answer

$$n$$

Question 15

Which of the following statements about parental care is correct?

Accepted Answer

Internal fertilization usually produces fewer zygotes but greater survival due to parental care.

Question 16

Which of the following is a plausible consequence of climate change on animal reproductive success?

Accepted Answer

Decreased reproductive success due to disruption of seasonal breeding cues.

Question 17

Which of the following best describes the process of budding in animal reproduction?

Accepted Answer

An offspring forms within or on the parent and grows into a miniature version before breaking free.

Question 18

Which of the following is TRUE about the reproductive systems of most mammals compared to non-mammalian vertebrates?

Accepted Answer

Most mammals have separate openings for digestive, excretory, and reproductive tracts.

Question 19

Which of the following is a correct statement about the role of pheromones in external fertilization?

Accepted Answer

Pheromones may help synchronize gamete release among individuals.

Question 20

Which of the following is a real-world example of oviparous parental care?

Accepted Answer

A giant water bug guarding its eggs until they hatch.

Animal Reproduction: Mechanisms, Diversity, and Evolutionary Context

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