Unit 8 Cells Test

Which term refers to the movement of molecules from an area of higher concentration to an area of lower concentration?

Diffusion

The human stomach helps break down food for digestion. Which statement best describes the stomach?

It is composed of millions of cells of several types working together to perform a function.

Which of these statements about cells is correct?

Multicellular organisms can have more than a billion cells.

Which term refers to the diffusion of water molecules through a selectively permeable membrane?

Osmosis

Cells are the basic unit of structure and function in all living organisms. Which describes the greatest difference between the cells of a baby gorilla and the cells of an adult gorilla?

The adult has more cells than the baby.

Tracey was learning about structural organization in animals. What level of structural organization best describes an egg?

a cell

The cell theory states that

all cells come from existing cells.

Which structures are common to both plant and animal cells?

cell membrane, nucleus, mitochondria.

Water enters a plant cell through the

cell wall

The most basic level of organization in the human body

cell.

The basic units of structure and function for both plants and animals are

cells.

Which of these is the fundamental unit of life?

cells.

Which plant cell structures capture sunlight to produce sugars?

chloroplasts

Which one of these is not a characteristic of an animal?

is multicellular with cells that have cell walls

Which cellular structure allows nutrients to pass into cells?

membrane

Which of these cell structures converts nutrients to energy for cell functions?

mitochondria

A cell that has lost its nucleus no longer has the ability to

pass genetic information.

Plant and human cells are different because

plant cells make their own food but humans do not.

This cell needs nutrients to make its own food:

plant cells.

This cell uses energy, carbon dioxide, and water:

plant cells.

Plant cells look

square