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 best describes a chemoautotroph?

Accepted Answer

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

Question 4

Which of the following is a defining characteristic of all mammals?

Accepted Answer

Presence of mammary glands that produce milk

Question 5

A patient is experiencing rapid blood loss. The body responds by increasing heart rate and constricting blood vessels to maintain blood pressure. This is an example of:

Accepted Answer

Negative feedback

Question 6

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

Accepted Answer

Movement and capturing food

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 tissues is responsible for transmitting electrical impulses in the body?

Accepted Answer

Nervous tissue

Question 9

Which of the following is NOT a function of epithelial tissue?

Accepted Answer

Conducting electrical impulses

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

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 12

Which of the following is a characteristic shared by all vertebrates?

Accepted Answer

A backbone composed of vertebrae

Question 13

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 14

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

Accepted Answer

Release of oxytocin during childbirth to intensify uterine contractions

Question 15

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

Accepted Answer

Contraction to produce movement

Question 16

A scientist is examining a tissue sample under a microscope and observes cells with long extensions and the ability to transmit signals. Which type of cell is being observed?

Accepted Answer

Neuron

Question 17

Which of the following is a defining feature of amniotes?

Accepted Answer

They produce eggs with specialized membranes that protect the embryo.

Question 18

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

Accepted Answer

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

Question 19

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

Accepted Answer

Simple squamous epithelium

Question 20

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

Accepted Answer

Esophagus

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

Study Guide - Practice Questions

Study Guide - Flashcards