Science Ch. 8 Test

Question 1

Which is thought to be the ancestor of land plants?

Answer 1

Green Algae

Question 2

Organisms that produce their own food are called?

Answer 2

Autotrophs

Question 3

The sac inside a plant cell where water, food, and wastes are sorted is the ?

Answer 3

Vacuole

Question 4

Two structures found in plant cells but NOT in animal cells are?

Answer 4

Cell Walls and Chloroplasts

Question 5

True or False: The cell walls helps a plant retain water

Answer 5

False: The cuticle helps a plant retain water

Question 6

True or False: During photosynthesis, plants produce carbon dioxide.

Answer 6

False: During photosynthesis, plants produce food and oxygen

Question 7

True or False: The green pigment found in specialized plant structures is called chlorophyll.

Answer 7

True

Question 8

True or False: The system of tubelike structures inside a plant through which water, minerals, and food move is called root tissue>

Answer 8

False: The system of tubelike structures inside a plant through which water, minerals, and food move is called vascular tissue

Question 9

True or False: Nearly all plants are unicellular.

Answer 9

False: Nearly all plants are multicellular

Question 10

True or False: The energy for photosynthesis is from the sun.

Answer 10

True

Question 11

Animals are helpful to plants in the process of what?

Answer 11

Pollination

Question 12

Which is NOT part of a flower’s pistil?

Answer 12

Anther

Question 13

Which part of a plant is responsible for absorbing water and minerals and anchoring the plant?

Answer 13

Roots

Question 14

The three parts of a seed are?

Answer 14

Embryo, stored food, seed coat

Question 15

What is the scattering of seeds?

Answer 15

Dispersal

Question 16

What is a flower bud that is protected by leaflike structures?

Answer 16

Seafulls

Question 17

What protects the root as it grows through the soil?

Answer 17

Root cap

Question 18

What happens if a tree has 24 light and dark rings?

Answer 18

It is 24 years old

Question 19

What is on the surface of a leaf control the movement of gases into and out of the leaf?

Answer 19

Stomata

Question 20

What is the hollow structure at the base of a pistil that protects seeds as they develop?

Answer 20

Ovary

Question 21

A plant stem that grows toward light is an example of a?

Answer 21

Positive Phototropism

Question 22

To which three stimuli do plants respond?

Answer 22

Touch, gravity, and light

Question 23

When chlorophyll in leaves breaks down, what happens?

Answer 23

Yellow and orange pigments become visible

Question 24

Irises and lettuce flower when nights are shorter than a critical length. They can be described best as what?

Answer 24

Long-day plants

Question 25

True or False:Chemicals produced by a plant that control its growth and development are called hormones.

Answer 25

True

Question 26

True or False: A plant's roots grow away from a rock they hit in the soil. This is an example of a positive thigmotropism.

Answer 26

False: It is an example of a negative thigmotropism.

Question 27

True or False: Chlorophyll speeds up that rate at which a plant's cells grow and controls a plant's response to light.

Answer 27

False: Auxin speeds up the rate

Question 28

True or False: The critical night length for a certain plant is 10 hours. This plant will flower only when nights are shorter than 10 hours.

Answer 28

False: It will flower when nights are longer than 10 hours

Question 29

A plant adaptation that helps it survive freezing temperatures and lack of liquid water is dormancy.

Answer 29

True

Question 30

The blooming of poinsettias in winter and irises in spring is an example of phototropism.

Answer 30

False: It is an example of Photopardosim.