Question 1

Which level of biological organization is immediately more microscopic than the organ level?

Accepted Answer

Tissue level

Question 2

The kidney is best classified at which level of biological organization?

Accepted Answer

Organ level

Question 3

A community plus its physical environment is referred to as which level of organization?

Accepted Answer

Ecosystem

Question 4

What is the term for the sum of all chemical reactions occurring within a living organism?

Accepted Answer

Metabolism

Question 5

The internal environment of an organism that remains constant within physiological boundaries is called:

Accepted Answer

Homeostasis

Question 6

What is the name of the zone of air, land, and water at the surface of the Earth where living organisms are found?

Accepted Answer

Biosphere

Question 7

Which process transforms solar energy into the chemical energy of nutrient molecules?

Accepted Answer

Photosynthesis

Question 8

Over generations, populations accumulate adaptations that make them more suited to their environments. What is this process called?

Accepted Answer

Evolution

Question 9

The discipline of naming and classifying organisms according to certain rules is called:

Accepted Answer

Taxonomy

Question 10

Which taxonomic category is just below (less inclusive than) Kingdom?

Accepted Answer

Phylum

Question 11

Which taxonomic category is just above (more inclusive than) species?

Accepted Answer

Genus

Question 12

Which domain includes organisms with a membrane-bound nucleus?

Accepted Answer

Eukarya

Question 13

Which domain includes organisms capable of living in extreme environments, such as hot springs or salt lakes?

Accepted Answer

Archaea

Question 14

What is the phenomenon called whereby water molecules cling to each other due to hydrogen bonding?

Accepted Answer

Cohesion

Question 15

A molecule that tends to lower the hydrogen ion concentration in a solution and raise the pH numerically is called:

Accepted Answer

Base

Question 16

What is the pH of pure water at 25°C?

Accepted Answer

$$7$$

Question 17

What is the maximum number of other elements a single carbon atom can covalently bond with?

Accepted Answer

$$4$$

Question 18

How many covalent bonds are formed between the two oxygen atoms in a diatomic oxygen molecule ($$O_2$$)?

Accepted Answer

$$3$$

Question 19

How many pairs of electrons are shared in a diatomic hydrogen molecule ($$H_2$$)?

Accepted Answer

$$1$$

Question 20

What is the functional group $$-OH$$ called?

Accepted Answer

Hydroxyl group

Introductory Biology Study Guide: Levels of Organization, Classification, Biochemistry, and Cell Structure

Study Guide - Practice Questions