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 all mammals?

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

They are extensions of the cell used for movement and capturing food.

Question 5

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

Accepted Answer

Shivering to increase body temperature when you are cold

Question 6

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

Accepted Answer

Molecule, cell, tissue, organ, organ system, organism

Question 7

Which of the following tissues is responsible for voluntary movement in the human body?

Accepted Answer

Skeletal muscle tissue

Question 8

A patient is diagnosed with a disorder affecting the tissue that lines the air sacs of the lungs, allowing for rapid gas exchange. Which type of epithelial tissue is most likely affected?

Accepted Answer

Simple squamous epithelium

Question 9

Which of the following statements about homeostasis is correct?

Accepted Answer

Homeostasis maintains internal conditions within a narrow range despite external changes.

Question 10

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

Accepted Answer

Loose connective tissue

Question 11

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

Accepted Answer

They possess an amniotic egg, allowing reproduction away from water.

Question 12

Which of the following is NOT a function of plasma in the blood?

Accepted Answer

Carrying oxygen via hemoglobin

Question 13

Which of the following is a correct example of a positive feedback mechanism?

Accepted Answer

Release of oxytocin to intensify uterine contractions during childbirth

Question 14

Which of the following structures is found in all vertebrates?

Accepted Answer

A backbone (vertebral column)

Question 15

Which of the following best describes the function of neurons?

Accepted Answer

They transmit electrical signals throughout the body.

Question 16

Which of the following groups includes organisms that are important primary producers in aquatic ecosystems and have silica-based cell walls?

Accepted Answer

Diatoms

Question 17

Which of the following is a correct pairing of a tissue type and its primary function?

Accepted Answer

Epithelial tissue – protection and absorption

Question 18

Which of the following best explains why birds are considered part of the class Reptilia in modern scientific classification?

Accepted Answer

Birds share a common ancestor with reptiles and possess amniotic eggs.

Question 19

A researcher is studying an organism that is endothermic, has hair, and gives birth to live young that develop in a pouch. To which group does this organism most likely belong?

Accepted Answer

Marsupials

Question 20

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

Accepted Answer

The thin walls of alveoli allow for efficient gas exchange between air and blood.

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

Study Guide - Practice Questions

Study Guide - Flashcards