Sexual Reproduction in Flowering Plants
Test 2

Correct answer Carries: 4.

Wrong Answer Carries: -1.

In the process of fertilization in flowering plants, the male gamete reaches the ovule via:

Pollen tube
Style
Sepal
Petal
1

After pollination, the pollen germinates on the stigma and grows a pollen tube through the style to reach the ovule for fertilization.

Flowers adapted for wind pollination typically exhibit which of the following characteristics?

Large, colorful, and fragrant petals
Small, green, and inconspicuous flowers with exposed stamens
Tubular shape with nectar guides
Dense clustering of showy petals
2

Wind-pollinated flowers are usually small, green, and lack showy petals because they do not rely on attracting animal pollinators.

During microsporogenesis, the microspore mother cell undergoes meiosis to produce how many microspores?

1
2
3
4
4

Meiosis in the microspore mother cell produces a tetrad of four haploid microspores.

Which of the following is NOT a typical characteristic of cleistogamous flowers?

They remain closed during pollination
They exhibit self-pollination
They produce large, showy petals
They ensure reproduction under unfavorable conditions
3

Cleistogamous flowers are generally inconspicuous and do not produce showy petals since they self-pollinate while closed.

Which of the following statements about apomixis in flowering plants is correct?

Apomixis is a sexual process involving the fusion of gametes.
Apomixis results in seed formation without fertilization, producing clonal offspring.
Apomixis is exclusive to gymnosperms.
Apomixis increases genetic variation through recombination.
2

Apomixis is an asexual form of reproduction where seeds develop without fertilization, resulting in offspring genetically identical to the parent.

Which of the following statements about auxin's role in fruit set is correct?

Auxin plays a crucial role in initiating fruit development after fertilization.
Auxin completely inhibits fruit growth.
Auxin is not involved in the process of fruit set.
Auxin only affects vegetative growth and not reproductive development.
1

Auxin is involved in fruit set by stimulating cell division and growth in the ovary after fertilization, thus initiating fruit development.

Which of the following statements about polyspermy prevention in flowering plants is correct?

Mechanisms exist that ensure only one sperm fuses with the egg cell, thereby preventing polyspermy.
Polyspermy is common and beneficial in flowering plants.
Multiple sperm typically fuse with the egg cell to increase genetic diversity.
There is no mechanism to prevent polyspermy in angiosperms.
1

Flowering plants have evolved mechanisms to ensure that only a single sperm fertilizes the egg, thus preventing polyspermy, which would otherwise lead to abnormal development.

What does the term 'gametophyte' refer to in flowering plants?

The structure that forms the seed coat
The generation that produces gametes
The tissue that gives rise to the fruit
The dormant stage of the embryo
2

The gametophyte is the haploid generation in plants that produces gametes (pollen in the male and embryo sac in the female).

Which of the following correctly defines herkogamy?

Temporal separation of male and female functions
Spatial separation of stamens and pistils within the flower
A genetic mechanism preventing self-fertilization
Transfer of pollen by wind
2

Herkogamy is the spatial separation of male and female reproductive organs within a flower, which helps reduce the chances of self-pollination.

The term 'syngamy' in plant reproduction refers to:

The production of gametes
The fusion of male and female gametes
The growth of the pollen tube
The process of seed dispersal
2

Syngamy is the fusion of the male and female gametes, which results in the formation of a zygote.

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