Dinosaurs used to roam the Earth. What evidence do we have to support this statement?

Scientists have found many fossilized remains of dinosaurs.

Arrange the following levels of organization from simplest to most complex:

Cell, tissue, organ, organ system, organism

The forelimbs of all these animals are similar. What does this tell us?

All of these animals share a common ancestor.

How do polar bears' fat cells help them survive hibernation during the long cold winter months?

They provide warmth and energy.

The whale's hind leg bones are shown in the circle. What does this tell us?

A whale's ancestor used to walk on land.

How are the reproductive cells in the picture below different from other cells?

They have half the amount of genes.

What is the role of a producer in a food web?

It changes solar energy (sun) to chemical energy (sugar).

What is the role of a decomposer in a food web?

It gets energy by breaking down once living matter.

What would happen if the cells of your body could not divide?

The cut would be unable to heal.

A goat has a gene for white fur, but its fur is black. This is possible because...

The gene for black fur is dominant and "wins" over the white

What is the role of a consumer in a food web?

It gets energy by eating other organisms.

A person receives their eye color by...

inheriting it from their parents.

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7th Grade Life Science Review

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Review for 7th grade science

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Questions 35

Answers

1
Dinosaurs used to roam the Earth. What evidence do we have to support this statement?
Scientists are unsure of the existence of dinosaurs.
Scientists have found many fossilized remains of dinosaurs.
Scientists observed and recorded their extinction.
Scientists found cave paintings of dinosaur-like creatures.
2
One parent organism produces an offspring. This is an example of...
both asexual and sexual reproduction.
asexual reproduction.
sexual reproduction
3
To perform the activities of life, all cells require...
energy.
oxygen.
light.
chlorophyll.
4
The process of converting solar energy (sun) to chemical energy is called...
fermentation
osmosis
photosynthesis
cellular respiration
5
Arrange the following levels of organization from simplest to most complex:
Organism, organ system, organ, tissue, cell
Cell, tissue, organ system, organ, organism
Tissue, cell, organ, organ system, organism
Cell, tissue, organ, organ system, organism
6
Species that do not adapt to their environment are likely to...
become evolved.
destory their environment.
become extinct.
be changed by their environment.
7
The forelimbs of all these animals are similar. What does this tell us?
All of these animals adapted to the same environment.
All of these animals have the same vestigial organs.
All of these animals survived the same mass extinction.
All of these animals share a common ancestor.
8
A muscle cell is specialized to ...
recieve and transmit signals.
contract and relax.
provide protection.
carry gasses, like oxygen & carbon dioxide.
9
How do polar bears' fat cells help them survive hibernation during the long cold winter months?
They provide warmth and energy.
They provide food and allow movement.
They provide energy and remove waste.
They provide warmth and allow movement.
10
A skin cell is specialized to ...
contract and relax.
receive and transmit signals.
provide protection.
carry gasses, like oxygen & carbon dioxide.
11
In a food chain, what happens to the amount of available energy as it travels through the chain
Decreases
Increase then decrease
Stays the same
Decrease then increase
12
Interpret the pictures below. What TWO life processes do they all have in common?
Eat food and grow
Breathe and eat food
Grow and reproduce
Reproduce and breathe
13
An example of an animal produced through the process of selective breeding is the...
Wolf
German Shepherd
Fox
Coyote
14
An organ system of the body...
works with other organ systems to help the body function.
is specialized to perform certain functions.
All of the above.
is made up of multiple organs working together.
15
The whale's hind leg bones are shown in the circle. What does this tell us?
A whale's ancestor used to fly
A whale's ancestor used to live in water.
A whale's ancestor used to slither snake-like on land.
A whale's ancestor used to walk on land.
16
How are the reproductive cells in the picture below different from other cells?
They have triple the amount of genes.
They have half the amount of genes.
They have double the amount of genes.
They have no genes.
17
What is the role of a producer in a food web?
It gets energy by eating living matter.
It changes solar energy (sun) to chemical energy (sugar).
It changes chemical energy (sugar) into solar energy (sun).
It gets energy by breaking down once living matter.
18
Which of the following structures is found in plant cells but not in animal cells?
Nucleus
Mitochondria
Cell membrane
Cell Wall
19
What is the most important cell process for growth and development to occur?
Osmosis
Mitochondria
Photosynthesis
Mitosis
20
Approximately what percentage of your genes came from your biological mom?
75%
50%
25%
It depends on whether you are a boy or a girl.
21
What is the role of a decomposer in a food web?
It changes chemical energy into solar energy.
It gets energy by breaking down once living matter.
It changes solar energy into chemical energy.
It gets energy by eating living matter.
22
The Happy-Face Spiders below are all the same species. What term do these spiders show?
Adaptation
Variation
Natural Selection
Evolution
23
When the offspring is genetically identical to the parent offspring that is because of...
sexual reproduction
both asexual and sexual reproduction.
asexual reproduction.
24
Which of the following is true of genes?
Genes are found on chromosomes.
All of the above.
Genes are sections of DNA.
Genes are found in cells.
25
Offspring have genetic information from both parents is because of...
sexual reproduction.
asexual reproduction.
both asexual and sexual reproduction.
26
What would happen if the cells of your body could not divide?
Your body would heal the cut with cells from other areas.
The cut would take longer to heal.
The cut would be unable to heal.
The cells around the cut would stretch to cover the injury.
27
Two parent organisms is ...
asexual reproduction.
sexual reproduction.
both asexual and sexual reproduction.
28
What two traits below are acquired?
Eye color & language
Chess ability & language
Eye color & height
Hair color & chess ability
29
Camouflage allows organisms to blend in with their environment. This is an example of...
Evolution
Adaptation
Overproduction
Natural Selection
30
A goat has a gene for white fur, but its fur is black. This is possible because...
The gene for black fur is dominant and "wins" over the white
The gene for black fur is recessive and "wins" over white
The gene for white fur is recessive and "wins" over black
The gene for white fur is dominant and "wins" over the black
31
A section of chromosome that codes for a trait is called a ...
nucleotide.
gene.
centromere.
nitrogen base.
32
Many plant cells, particularly in leaves, are green in color because of the presence of ...
Cell walls
Mitochondria
Cytoplasm
Chloroplasts
33
What is the role of a consumer in a food web?
It gets energy by breaking down once living matter.
It changes solar energy (sun) into chemical energy (sugar).
It changes chemical energy (sugar) into solar energy (sun).
It gets energy by eating other organisms.
34
A person receives their eye color by...
acquiring it over time.
environmental factors.
inheriting it from their parents.
None of the above.
35
A nerve cell is specialized to ...
receive and transmit signals.
carry gasses like oxygen and carbon dioxide.
provide protection.
contract and relax.

7th Grade Life Science Review Flashcards | StudBud