Question 1

Which evolutionary innovation allowed reptiles to reproduce successfully away from aquatic environments?

Accepted Answer

Amniotic egg with a waterproof shell

Question 2

What is the primary function of keratinized scales in reptiles?

Accepted Answer

Preventing desiccation and providing physical protection

Question 3

Which structure in the amniotic egg is responsible for storing nitrogenous waste produced by the embryo?

Accepted Answer

Allantois

Question 4

Why are reptiles considered the first true land vertebrates?

Accepted Answer

They developed waterproof eggs and skin, allowing independence from water for reproduction

Question 5

Which of the following is NOT a function of reptile scales?

Accepted Answer

Facilitating gas exchange

Question 6

A sudden worldwide increase in iridium levels in rocks dating to 65 million years ago is evidence for which event?

Accepted Answer

The extinction of the dinosaurs due to a meteor impact

Question 7

Which of the following best explains why reptiles are limited in their activity at night and in cold climates?

Accepted Answer

They are ectothermic and rely on environmental heat sources

Question 8

Which order of extant reptiles is characterized by a unique, specialized bony shell and a beak made of keratin?

Accepted Answer

Testudinata

Question 9

What is the evolutionary significance of the amniotic egg?

Accepted Answer

It allowed vertebrates to reproduce successfully away from aquatic habitats

Question 10

Which group of amniotes is characterized by two openings in the skull behind the eye sockets?

Accepted Answer

Diapsids

Question 11

A lizard is observed basking in the sun before becoming active. This behavior is most directly related to which physiological trait?

Accepted Answer

Ectothermy

Question 12

Which of the following is a trade-off associated with the evolution of waterproof skin in reptiles?

Accepted Answer

Loss of cutaneous respiration, requiring more efficient lungs

Question 13

Which of the following anti-predator mechanisms is found in some gecko species?

Accepted Answer

Tear-away skin that can be shed when attacked

Question 14

Which of the following statements about reptile reproduction is correct?

Accepted Answer

Most reptiles lay eggs, but some give birth to live young

Question 15

Which of the following best describes the role of plate tectonics in reptile evolution?

Accepted Answer

It influenced the climate and distribution of reptiles by changing the positions of continents

Question 16

Which of the following is NOT a function of the chorion in the amniotic egg?

Accepted Answer

Storage of nitrogenous waste

Question 17

A scientist finds a fossil with two temporal openings in the skull behind each eye socket. To which group does this animal most likely belong?

Accepted Answer

Diapsids

Question 18

Which of the following is a limitation of ectothermy in reptiles?

Accepted Answer

They are usually restricted to low altitudes and warmer climates

Question 19

Which of the following is a correct pairing of reptile order and characteristic?

Accepted Answer

Testudinata – beak made of keratin

Question 20

Which of the following best explains why some scientists believe dinosaurs may have been mesothermic?

Accepted Answer

Fossil evidence suggests they lived in cold regions and had traits between ectotherms and endotherms

Reptiles: Evolution, Adaptations, and Diversity

Study Guide - Practice Questions