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Ch 7, Les 4-6 (7th Grade)
Test Description: Plants
Instructions: Answer all questions to get your test result.
1) In the ___ stage, the plant produces sperm and egg cells.
A
eggophyte
B
sporophyte
C
gametophyte
D
spermophyte
2) Flowering plants that live for more than two years are called
A
perpetuals
B
annuals
C
biennials
D
perennials
3) The product of fertilization, when sperm unites with egg, is called
A
tropism
B
seed
C
zygote
D
spore
4) Asexual reproduciion can reproduce unfavorable traits since there is no new genetic info being passed on to offspring.
A
true
B
false
5) Mosses, ferns, and hornworts all live in ___ environments.
A
hot
B
moist
C
cold
D
dry
6) Where are seeds made on a gymnosperm?
A
spore cases
B
cone
C
flower
D
pollen
7) How many egg cells form inside each ovule on the female cone?
A
1
B
2
C
4
D
3
8) The female cone stays sealed until
A
the weather is wet
B
the male cones fall off the tree
C
the seeds are mature
D
the pollen knocks on the scales
9) A captured pollen grain on a stigma grows a pollen tube to the
A
seed
B
fruit
C
ovule
D
anther
10) ___ are the means by which angiosperm seeds are dispersed.
A
cones
B
animals
C
wind gusts
D
fruit
11) A mimosa plant closing up after being touched is an example of a
A
negative thigmotropism
B
positive gravitropism
C
negative gravitropism
D
positive thigmotropism
12) A plant stem growing upward after the plant's pot has fallen over is an example of
A
negative gravitropism
B
negative phototropism
C
positive gravitropism
D
negative thigmotropism
13) A plant hormone that speeds up the rate at which a plant's cells grow and controls a plant's response to light
A
epinepherine
B
cytokinin
C
gibberellin
D
auxin
14) Which plants flower when the nights are longer than a critical length?
A
day-neutral plants
B
long-day plants
C
short-day plants
15) A plant's response to seasonal changes in the length of night and day is called
A
critial night length
B
phototropism
C
thigmotropism
D
photoperiodism
16) Leaves change color because
A
the cold makes their colors change
B
they stop producing chlorophyll
C
they start making chlorophyll
D
they went to the salon and got a new color
17) Plants do NOT
A
protect the soil
B
break down dead things to release their energy into the environment
C
provide homes
D
provide food
18) Plants are not used for medicines
A
false
B
true
19) Vegetables, fruits, and cereals all come from
A
angiosperms
B
mosses
C
nonvascular plants
D
gymnosperms
20) Conifer sap is used to make
A
turpentine and rosin
B
rubber
C
rayon fibers and cellophane
D
paper
*select an answer for all questions
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