1.
the smallest level of organization in living things is

the atom.

the cell.

the small tissue.

the nervous system.
2.
a group of cells working together make up a(n)

organ

organ system

tissue

molecule
3.
an organ system is made up of

a group of organs working together.

a group of tissues working together.

a group of atoms working together.

a group of cells working together.
4.
an organism is made up of

a group of cells working together.

a group of tissues working together.

a group of organ systems working together.

a group of atoms working together.
5.
all of the following are a part of the cell theory except

all organisms are made of cells.

all cells come from other cells.

all cells are exactly the same.

cells are the basic unit of life.
6.
which of the following is a unicellular organism?

a turtle

a flea

a cat

a bacteria
7.
an organism that contains multiple cells is known is correctly known as a

multicellular organism.

multi-tissue organism.

several cell organism.

multiple cell organism.
8.
the process of cells dividing into new, identical cells is known as

mitosis

cellular replication

homeostasis

cell birth
9.
which of the following is not true of cells?

cells are living.

not all cells are the same.

some cells are living and some cells are not.

cells have the seven properties of life.
10.
organelles in cells are similar to in humans.

atoms

nerves

organs

cells
11.
this organelle contains the information to run the cell.

dna

nucleus

vacuole

mitochondria
12.
which of the following organelles is found in plants cells but not in animal cells?

cell membrane

cell wall

nucleus

mitochondria
13.
which of the following organelles is responsible for breaking down food into energy?

nucleus

cell membrane

mitochondria

endoplasmic reticulum
14.
the cell membrane maintain in the cell by controlling what comes in and out of the cell.

proper organelle levels

homeostasis

proper size

temperature
15.
what is homeostasis?

homeostasis is when cells extract energy from food.

homeostasis is when cells maintain internal balance.

homeostasis is when cells grow.

homeostasis is when cells reproduce.
16.
the system is responsible for protecting the body against infection.

immune

respiratory

circulatory

nervous
17.
which body system is responsible for bringing oxygen into the body?

the digestive system

the respiratory system

the circulatory system

the musculoskeletal system
18.
the system extracts energy from food.

circulatory

respiratory

musculoskeletal

digestive
19.
the nervous system is responsible for

delivering oxygen to the body.

moving blood around the body.

passing information from the brain to the rest of the body.

fighting off disease.
20.
which body system is responsible for transporting nutrients to the different parts of the body?

the digestive system

the respiratory system

the circulatory system

the musculoskeletal system
21.
viruses are the only infectious agents that are

living.

deadly.

not living.

naturally occurring.
22.
which of the following is a way your body fights a bacterial infection?

fever

shivers

sweats

increased heart rate
23.
which of the following levels of classification is the least specific?

domain

kingdom

class

species
24.
domains are broken down into

species

class

phylums

kingdoms
25.
which level of organization is the largest?

domain

kingdom

genus

species