Ch 7, Les 4-6 (7th Grade) Question Preview (ID: 61031)


Plants. TEACHERS: click here for quick copy question ID numbers.

In the ___ stage, the plant produces sperm and egg cells.
a) gametophyte
b) sporophyte
c) spermophyte
d) eggophyte

Flowering plants that live for more than two years are called
a) perennials
b) annuals
c) perpetuals
d) biennials

The product of fertilization, when sperm unites with egg, is called
a) zygote
b) spore
c) seed
d) tropism

Asexual reproduciion can reproduce unfavorable traits since there is no new genetic info being passed on to offspring.
a) true
b) false
c)
d)

Mosses, ferns, and hornworts all live in ___ environments.
a) moist
b) dry
c) hot
d) cold

Where are seeds made on a gymnosperm?
a) cone
b) flower
c) spore cases
d) pollen

How many egg cells form inside each ovule on the female cone?
a) 2
b) 1
c) 3
d) 4

The female cone stays sealed until
a) the seeds are mature
b) the weather is wet
c) the pollen knocks on the scales
d) the male cones fall off the tree

A captured pollen grain on a stigma grows a pollen tube to the
a) ovule
b) anther
c) fruit
d) seed

___ are the means by which angiosperm seeds are dispersed.
a) fruit
b) wind gusts
c) animals
d) cones

A mimosa plant closing up after being touched is an example of a
a) negative thigmotropism
b) positive thigmotropism
c) negative gravitropism
d) positive gravitropism

A plant stem growing upward after the plant's pot has fallen over is an example of
a) negative gravitropism
b) negative phototropism
c) negative thigmotropism
d) positive gravitropism

A plant hormone that speeds up the rate at which a plant's cells grow and controls a plant's response to light
a) auxin
b) gibberellin
c) cytokinin
d) epinepherine

Which plants flower when the nights are longer than a critical length?
a) short-day plants
b) long-day plants
c) day-neutral plants
d)

A plant's response to seasonal changes in the length of night and day is called
a) photoperiodism
b) critial night length
c) thigmotropism
d) phototropism

Leaves change color because
a) they stop producing chlorophyll
b) they start making chlorophyll
c) they went to the salon and got a new color
d) the cold makes their colors change

Plants do NOT
a) break down dead things to release their energy into the environment
b) provide homes
c) provide food
d) protect the soil

Plants are not used for medicines
a) false
b) true
c)
d)

Vegetables, fruits, and cereals all come from
a) angiosperms
b) gymnosperms
c) mosses
d) nonvascular plants

Conifer sap is used to make
a) turpentine and rosin
b) rayon fibers and cellophane
c) rubber
d) paper

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