Question 1

Which of the following best describes the main structural difference between Gram-positive and Gram-negative bacteria?

Accepted Answer

Gram-positive bacteria have a thick layer of peptidoglycan, while Gram-negative bacteria have a thin layer of peptidoglycan and an outer membrane.

Question 2

A scientist discovers a new prokaryote that obtains energy by oxidizing inorganic molecules and uses carbon dioxide as its carbon source. Which nutritional category does this organism belong to?

Accepted Answer

Chemoautotroph

Question 3

Which of the following is a defining characteristic of mammals that distinguishes them from other amniotes?

Accepted Answer

Presence of mammary glands

Question 4

Which of the following best describes the function of pseudopodia in protists such as foraminiferans and radiolarians?

Accepted Answer

Movement and capturing food

Question 5

A patient is diagnosed with a disorder affecting the tissue that lines the inside of blood vessels. Which type of tissue is most likely affected?

Accepted Answer

Simple squamous epithelial tissue

Question 6

Which of the following is an example of negative feedback in human physiology?

Accepted Answer

Shivering to increase body temperature when cold

Question 7

Which of the following is the correct order of biological organization from smallest to largest?

Accepted Answer

Molecule $$\rightarrow$$ Cell $$\rightarrow$$ Tissue $$\rightarrow$$ Organ $$\rightarrow$$ Organ system $$\rightarrow$$ Organism

Question 8

Which of the following best describes the function of plasma in the human body?

Accepted Answer

It serves as the liquid matrix of blood, transporting nutrients, hormones, and waste products.

Question 9

Which of the following is the most common type of connective tissue in the human body?

Accepted Answer

Loose connective tissue

Question 10

A biologist is studying an animal that lays eggs, has hair, and produces milk. To which group does this animal most likely belong?

Accepted Answer

Monotremes

Question 11

Which of the following best explains why birds are considered part of the class Mammalia in the scientific view of vertebrate evolution?

Accepted Answer

Birds are not considered mammals; they are classified as a separate class, Aves, but share a common amniote ancestor with mammals.

Question 12

Which of the following is a characteristic of endothermic animals?

Accepted Answer

They maintain a constant internal body temperature through metabolic activity.

Question 13

Which of the following is a function of neurons in the nervous system?

Accepted Answer

Transmitting electrical signals throughout the body

Question 14

Which of the following best describes the role of foraminiferans and radiolarians in marine ecosystems?

Accepted Answer

They are protists that use pseudopodia to capture food and contribute to marine sediments.

Question 15

Which of the following is an example of positive feedback in the human body?

Accepted Answer

The release of oxytocin during childbirth, which intensifies uterine contractions

Question 16

Which of the following best describes the function of flagella in bacteria?

Accepted Answer

Movement through liquid environments

Question 17

Which of the following is a correct example of how structure relates to function in tissues?

Accepted Answer

Simple squamous epithelium is thin, allowing efficient gas exchange in the lungs.

Question 18

Which of the following is NOT an organ of the respiratory system?

Accepted Answer

Esophagus

Question 19

A physiologist is studying how the body maintains stable blood pH despite changes in metabolism. This is an example of which concept?

Accepted Answer

Homeostasis

Question 20

Which of the following best describes the evolutionary significance of tetrapods?

Accepted Answer

They were the first vertebrates to colonize land with four limbs.

Unit 5 Study Guide: Microbial Diversity, Evolution of Vertebrates, and Animal Structure & Function

Study Guide - Practice Questions

Study Guide - Flashcards