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Life Science Review

Total questions: 40

Worksheet time: 20mins

Name
Class
Date
1.

An organism that eats grass and insects is

a)

an herbivore

b)

a producer

c)

prey

d)

an omnivore

2.

Some bacteria live in the stomach of a cow. The bacteria helps the cow break down and digest the plant food that the cow eats. The bacteria gets a meal. This is an example of

a)

Commensalism

b)

parasitism

c)

Mutualism

3.

Which organisms will you find the most of in an ecosystem?

a)

Consumer

b)

Producer

c)

Decomposer

4.

These 2 systems work together to make the body move

a)

skeletal and muscular

b)

digestive and excretory

c)

nervous and endocrine

d)

circulatory and respiratory

5.

this is the main organ of the nervous system

a)

brain

b)

heart

c)

lungs

d)

intestines

6.

this system helps the body get rid of carbon dioxide and brings in oxygen.

a)

circulatory

b)

endocrine

c)

respiratory

d)

skeletal

7.

the part of the plant cell that makes it's own food

a)

cell membrane

b)

nucleus

c)

mitochondria

d)

chloroplast

8.

this part of the plant and animal cell turns food into energy

a)

cytoplasm

b)

nucleus

c)

mitochondria

d)

cell membrane

9.

this part of the excretory system filters waste from the blood

a)

kidneys

b)

bladder

c)

lungs

d)

heart

10.

This part of the cell keeps all the organelles inside the cell and allows things into and out of the cell.

a)

cytoplasm

b)

liver

c)

cell membrane

d)

nucleus

11.

What is the main function of the excretory system?

a)

digest food that the cells can use

b)

bring nutrients to the cells

c)

remove waste from the body

d)

bring impulses to the brain.

12.

What is the correct order from smallest in hierarchy of living things?

a)

cells-tissues-organs-organ systems-organisms

b)

tissues-organs-cells-organisms-organ systems

c)

cells-organs-tissues-organ systems-organisms

d)

organs-organ systems-organisms-tissues-cells

13.

this part of the cell regulates the activities of the cell's organelles.

a)

cell membrane

b)

cell wall

c)

nucleus

d)

mitochondria

14.

These are part of the nervous system

a)

heart, brain, skin

b)

brain, spinal cord, nerves

c)

nerves, liver and stomach

d)

brain, stomach and nerves

15.
A storage place for nutrients, wastes, and water. A plant cell has a much larger storage area than an animal cell because it holds more water & sugars. 
a)
Mitochondria
b)
Cell Membrane
c)
Cell Wall
d)
Vacuole
16.
Which of these are not found in animal cells?
a)
Chloroplasts & organelles
b)
DNA & mitochondria
c)
Cell Wall & Cell Membrane
d)
Cell Wall & Chloroplasts
17.
What is mitosis?
a)
A process when cells divide to produce 2 daughter cells.
b)
A process where the body produces more body cells.
c)
A process where the body will growth, repair and regenerate itself.
d)
All of the Above
18.
A group of cells make up a ______
a)
cell
b)
organ
c)
tissue
d)
system
19.
The esophagus, stomach and intestines are part of what system?
a)
nervous system
b)
circulatory system
c)
digestive system
20.
What is the job of the ribosomes?
a)
manufactures proteins
b)
power house of the cell
c)
control center
d)
storage area
21.
Which body system is responsible for your sense of touch?
a)
nervous system
b)
digestive system
c)
respiratory system
22.

Which organism has the most energy stored in their cells?

a)

Grass and Wildflowers

b)

Mouse

c)

Snake

d)

Hawk

23.
Organisms that are classified as autotrophic are able to-
a)
be seen with the human eye
b)
move
c)
reproduce
d)
make their own food
24.
After fertilization, what develops in a flower?
a)
Fruit
b)
Bud
c)
Seed
d)
Flower
25.
What structures distinguish a plant cell from an animal cell?
a)
Plant cells have cell walls and ribosomes.
b)
Plant cells have cell walls and chloroplasts.
c)
Plant cells have chloroplasts and ribosomes.
d)
Plant cells have chloroplasts and mitochondria.
26.
Which of the following is a phenotype?
a)
BB
b)
Bb
c)
bb
d)
Blue eyes
27.
having two of the same genes for the trait (sometimes called purebred).
a)
homozygous
b)
hetrozygous
c)
protein
d)
chromosome
28.
having two different genes for a trait (sometimes called hybrid).
a)
protein
b)
homozygous
c)
heterozygous
d)
genotype
29.
A decomposer?
a)
Eats dead plants or animals and breaks down to put nutrients in the soil
b)
Eats plants or other animals for food
c)
Makes its own food
d)
Machine that gathers trash
30.
All members of one kind of organism that live in the same area
a)
population
b)
microorganism
c)
communit
d)
organism
31.
This animal is an .......
a)
Producer
b)
Consumer
c)
Decomposer
32.
Which of the following is a herbivore?
a)
cricket
b)
frog
c)
hawk
d)
shrew
33.
What does a food web represent?
a)
All connections of energy flow throughout all organisms in a habitat.
b)
The specific ways that mutualism is carried out.
c)
A single pathway or energy flow between organisms. 
d)
How carnivores get their food. 
34.
The process of change in the living parts of the ecosystem 
a)
ecological succession 
b)
primary succession 
c)
climax community
d)
pioneer species
35.

Scientists have found evidence in the fossil record that the structure of certain animals has changed over time. What is the best explanation of why animal populations adapted over time ?

a)

Species change because of use or disuse of traits.

b)

Species became extinct and were replaced by better-adapted species.

c)

Fossils remains provide clues as to why certain species have changed over time.

d)

Certain mutations in species have become more prevalent over time through natural selection.

36.

How does natural selection lead to evolution?

a)

Stronger offspring kill weaker members of the species.

b)

Individuals that are better adapted to their environment survive and reproduce.

c)

Overproduction provides food for stronger member of the species.

d)

Environmental changes kill weaker members of the species.

37.

Which organelle takes in sunlight and changes it into sugars for a plant to use?

a)

Chloroplasts

b)

Mitochondria

c)

Vacuole

d)

Endoplasmic Reticulum

38.
Which of the following means "change over time"
a)
natural selection
b)
speciation
c)
evolution
d)
isolation
39.

______ is the death of the last member of a species

a)

Speciation

b)

Convergent evolution

c)

Extinction

d)

Embryology

40.

Which of these is NOT a producer in the food chains?

a)

corn

b)

lion

c)

carrot

d)

grass

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