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Terms in this set (47)
The structure on a moss gametophyte in which spores are produces is the
Which of the following statements about moss spores is not true?
they are diploid
The sporophyte generation in mosses produces spores by
The dominant form of moss is the
In which of the following structures do mosses produce eggs?
The structures at point 3 are called
At which point in the life cycle does fertilization take place?
require water for fertilization to occur
Fern sporophytes consist of rhizomes and
Which of the following types of plants are homosporous?
mosses and ferns
Pollen is produced in the
The mature micropsore of a seed plant is called a
often is sticky or has heair
The process of transferring pollen from a male cone to a female cone in gymnosperms is called
Removing a flower's stigma would initially affect
If a plant's flowers are very colorful and produce nectar, the plant is probably pollinated by
tends to increas genetic variation
Cross-pollination is beneficial because it
produces new genetic variations
The flowers produced by angiosperms help ensure the transfer of gametes by
attracting a particular bird, insect, or other animal
Immediately following pollination,
the pollen tube begins to form
involves the union of egg and sperm, may not follow pollination at all, may not occur until weeks or months after pollination has takenplace
double fertilization has great survival value because
the embryo has its own temporary source of food
During fertilization in flowering plants, one sperm fuses with an egg to form and embryo, and another fuses with two nuclei to form nutritive tissue. This event is called
Which of the following occurs in angiosperms but not in gymnosperms?
What function do the fruits produced by angiosperms perform?
they provide food for humans and other animals, the protect the seeds, they disperse the seeds
The primary purpose of the fruit is
to disperse seeds
The cotyledons in a seed
provide food for the embryo
A typical seed contains all of the following except
a spore case
A seed or plant may remain inactive for a period of time when it is
The development of a seed into a seedling is referred to as
Which of the following enables seeds to germinate?
exposure to temperature changes, seed coat damage, penetration of water and oxygen through the seed coat
Once the food stored in a bean's cotyledons is used up,
the octyledons shrivel up and fall off
Asexual reproduction is advantageous when
plants are well adapted to their environment
Which of the following associations between a vegetative reproductive structure and its characteristics is incorrect?
runner- aboveground root that produces new plants
Plants the produce two different types of spores are known as ( ) plants.
The transfer of pollen grains from an anther to a stigma is known as ( )
The event in which one sperm fertilizes an egg and second sperm fuses with two nuclei is called ( )
The seeds of angiosperms are enclose in ( )
Because flowering plants are rooted in the ground and cannot move form place to place, they disperse their ( ) so that their offspring can grow in new environments.
A ( ) is a specialized structure that serves to protect a plant embryo from harsh conditions
Resumption of growth by a plant embryo in a seed is called ( )
Seeds typically enter a period of ( ) before they germinate
A disadvantage of asexual reproduction is that offspring lack ( ) variation; therefore, all the offspring are vulnerable to attack by the same diseases and pests
( ) reproduction involves growth of new cells, tissue,s and organs from stems, leaves, or roots of parent plants
Gymnosperms produce ( ) and male ( )
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