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 microorganism that produces methane as a metabolic byproduct and thrives in oxygen-free environments. To which group does this organism most likely belong?

Accepted Answer

Methanogens

Question 3

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

Accepted Answer

The regulation of blood glucose levels by insulin and glucagon

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 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 6

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

Accepted Answer

Skeletal muscle tissue

Question 7

A biologist is studying an organism that is endothermic, has hair, and produces milk for its young. Which group does this organism belong to?

Accepted Answer

Mammals

Question 8

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

Accepted Answer

Loose connective tissue

Question 9

Which of the following best describes the function of plasma in the blood?

Accepted Answer

It serves as the liquid matrix that transports nutrients, hormones, and waste products.

Question 10

Which of the following is a defining characteristic of monotremes among mammals?

Accepted Answer

They lay eggs instead of giving birth to live young.

Question 11

Which of the following best describes the main function of epithelial tissue?

Accepted Answer

It forms protective barriers and lines body surfaces and cavities.

Question 12

A patient is unable to maintain a stable internal body temperature in a cold environment. Which physiological process is most likely impaired?

Accepted Answer

Homeostasis

Question 13

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

Accepted Answer

The thin, flat shape of red blood cells increases surface area for gas exchange.

Question 14

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

Accepted Answer

Liver

Question 15

Which of the following best describes a chemoautotroph?

Accepted Answer

An organism that obtains energy by oxidizing inorganic substances and uses CO$$_2 as a $$carbon source.

Question 16

Which of the following is a correct way to name a simple squamous epithelial tissue?

Accepted Answer

A single layer of flat cells

Question 17

Which of the following statements about the evolutionary tree of mammals is correct?

Accepted Answer

Marsupials and placental mammals share a more recent common ancestor with each other than with monotremes.

Question 18

Which of the following is a function of neurons?

Accepted Answer

Transmitting electrical signals throughout the body

Question 19

Which of the following best describes the difference between positive and negative feedback?

Accepted Answer

Negative feedback counteracts changes to maintain homeostasis, while positive feedback amplifies changes.

Question 20

Which of the following is a characteristic of amniotes?

Accepted Answer

They possess an amniotic egg that allows reproduction on land.

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

Study Guide - Practice Questions

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