Question 1

Which of the following characteristics is unique to animals in the Kingdom Animalia compared to plants and fungi?

Accepted Answer

They are heterotrophic and lack cell walls.

Question 2

Which phylum is characterized by having no true tissues or nerves and is considered the simplest among animals?

Accepted Answer

Porifera

Question 3

A scientist discovers a new animal species with bilateral symmetry, a coelom, and the mouth forming before the anus during development. To which group does this animal most likely belong?

Accepted Answer

Protostomes

Question 4

Which of the following is a correct match between animal phylum and its symmetry?

Accepted Answer

Echinodermata – radial symmetry as adults

Question 5

Which germ layer gives rise to the nervous system and skin in animals?

Accepted Answer

Ectoderm

Question 6

A tick transmits Lyme disease to a human. This is an example of which type of interaction between humans and protostomes?

Accepted Answer

Pathogen and vector

Question 7

Which of the following is NOT a function of the mesoderm in triploblastic animals?

Accepted Answer

Formation of the nervous system

Question 8

Which of the following is a real-world example of a defense mechanism in animals?

Accepted Answer

Sea cucumbers expelling their intestines

Question 9

Which of the following equations best represents the relationship between the number of animal phyla with bilateral symmetry ($$B$$), total animal phyla ($$T$$), and those with radial symmetry ($$R$$)?

Accepted Answer

$$B = T - R$$

Question 10

A caterpillar is responsible for significant crop loss in a region. Which of the following best describes this interaction?

Accepted Answer

The caterpillar is a competitor with humans for food.

Question 11

Which of the following statements about chordates is correct?

Accepted Answer

Chordates possess a notochord at some stage in their development.

Question 12

Which animal group is most likely to have external fertilization as described in the study materials?

Accepted Answer

Many fish species

Question 13

Which of the following is a correct sequence of embryonic development in animals?

Accepted Answer

Zygote $$\rightarrow$$ Blastula $$\rightarrow$$ Gastrula

Question 14

Which of the following is an example of a deuterostome?

Accepted Answer

Starfish

Question 15

Which animal phylum includes organisms that can detect infrared radiation, as seen in some viper snakes?

Accepted Answer

Chordata

Question 16

Which of the following best describes the function of the coelom in animals?

Accepted Answer

It is a body cavity that contains internal organs.

Question 17

Which of the following is a plausible reason why insects are important to human agriculture?

Accepted Answer

They pollinate food crops.

Question 18

Which of the following is a correct pairing of animal group and a unique defense mechanism?

Accepted Answer

Texas horned lizard – shoots blood from its eyes

Question 19

Which of the following is a correct statement about the evolutionary relationship between protostomes and deuterostomes?

Accepted Answer

Deuterostomes develop the anus before the mouth during embryonic development.

Question 20

Which of the following equations correctly represents the relationship between the number of vertebrate classes ($$V$$), the number of fish classes ($$F$$), and the number of tetrapod classes ($$T) in $$the phylum Chordata?

Accepted Answer

$$V = F + T$$

L10 Biodiversity

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