Sexual Reproduction in Flowering Plants
Test 3

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which part of the flower eventually develops into the fruit after fertilization?

Sepals
Petals
Ovary
Stamen
3

After fertilization, the ovary develops into a fruit, which encloses and protects the developing seeds.

The micropyle in an ovule functions to:

Produce ovules
Serve as an entry point for the pollen tube
Develop into the seed coat
Attract pollinators
2

The micropyle is a small opening in the ovule that allows the pollen tube to enter and deliver the sperm cells for fertilization.

Which of the following is a characteristic feature of entomophilous (insect-pollinated) flowers?

Reduced, greenish petals
Brightly colored and scented petals
Abundant, lightweight pollen only
Exposed stamens and pistils without nectar
2

Entomophilous flowers are adapted to attract insects using bright colors, pleasant fragrances, and nectar rewards.

Which of the following best explains the evolutionary significance of sexual reproduction in flowering plants?

It results in offspring that are genetically identical to the parent.
It generates genetic variability, enhancing adaptability to changing environments.
It reduces the chance of mutation.
It eliminates the need for pollinators.
2

Sexual reproduction promotes genetic variation, which is crucial for the survival and adaptation of species under changing environmental conditions.

Which of the following statements about the evolution of sexual reproduction in flowering plants is incorrect?

Sexual reproduction increases genetic diversity among offspring.
Sexual reproduction allows plants to adapt to changing environments.
Sexual reproduction always produces genetically identical offspring.
Sexual reproduction has contributed to the evolutionary success of angiosperms.
3

Sexual reproduction generates genetic variation among offspring, unlike asexual reproduction which produces genetically identical individuals.

Which of the following statements about the function of synergid cells is correct?

Synergid cells secrete chemical attractants to guide the pollen tube towards the embryo sac.
Synergid cells fuse with sperm cells to form the zygote.
Synergid cells develop into the endosperm.
Synergid cells form the seed coat.
1

Synergid cells produce attractant peptides (LURE) that direct the pollen tube to the egg apparatus, aiding in successful fertilization.

Which part of the flower is responsible for producing pollen?

Carpel
Petal
Stamen
Sepal
3

The stamen, consisting of the anther and filament, produces pollen grains (male gametes).

The self-incompatibility mechanism in flowering plants prevents:

Cross-pollination
Genetic recombination
Self-pollination
Double fertilization
3

Self-incompatibility prevents self-pollination, thereby promoting cross-pollination and increasing genetic diversity.

Which layer in the anther is responsible for nourishing developing microspores?

Epidermis
Endothecium
Tapetum
Connective tissue
3

The tapetum provides nutrients and secretes materials required for the development and wall formation of microspores (pollen grains).

What is the primary advantage of sexual reproduction in flowering plants?

It produces genetically identical offspring
It increases genetic variation, enhancing adaptability
It requires less energy than asexual reproduction
It eliminates the need for pollinators
2

Sexual reproduction increases genetic diversity among offspring, which is crucial for adaptability in changing environments.

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