Sem 2 Review

Life's basic unit of structure and function is the

• gene

• cell

• organism

• species

The process by which organisms keep their internal conditions relatively stable is called

• homeostasis

• evolution

• reproduction

• photosynthesis

Which organizational level includes all of the other levels?

• biosphere

• ecosystem

• organism

• cell

Cell specialization in multicellular organisms allows cells to

• reproduce

• perform different functions

• respond to their environment

• be less complex

The amount of light and temperature are examples of

• characteristics of living things

• methods of energy production

• factors to which living things respond

• biological systems

A group of cells that together perform a similar function is called a(n)

• organ

• organ system

• tissue

• division of labor

Amino acid is to protein as

• fat is to lipid

• DNA is to RNA

• sugar is to fat

• simple sugar is to starch

A carbohydrate made up of two sugar units is a

• monosaccharide

• disaccharide

• polysaccharide

• bisaccharide

Cholesterol is a

• carbohydrate

• saturated fat

• steriod

• unsaturated fat

The plasma membrane contains channels that help move materials from one side to the other. What are the channels made of?

• carbohydrates

• lipids

• bilipids

• proteins