Plant Reproduction: Pollination, Germination, Penetration of the ovule, and Fertilization.

This is an MCQ-based quiz for GRE on the topic of Plant Reproduction.

Plant reproduction is the production of new offspring in plants, which can be accomplished by sexual or asexual reproduction. Sexual reproduction produces offspring by the fusion of gametes, resulting in offspring genetically different from either parent.

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What is the female reproductive structure in angiosperms?

Integument Pistil Pollen Stamen Petal

Double fertilization in angiosperms results in a __________ zygote and a triploid __________.

haploid . . . endosperm haploid . . . fruit diploid . . . endosperm diploid . . . seed diploid . . . fruit

Indole-3-acetic acid (IAA) is the most abundant hormone in plants. IAA falls under which classification of plant hormone?

Gibberellin Ethylene Abscisic acid Cytokinins Auxin

Perishable fruit is often picked before it is ripe. This hard, unripe fruit is easier to transport as it is less likely to bruise or spoil while in transit. Once fruit reaches its destination, it can be sprayed with a plant hormone that will promote its rapid ripening. What hormone is most likely used for this function?

Gibberellins Abscisic acid (ABA) Ethylene Cytokinins

Which of the following is not true of auxins, a class of plant hormones?

Indoleacetic acid (IAA) is a natural auxin They are responsible for phototropism—plants' tendency to grow toward light sources They promote fruit ripening, which triggers the production of more auxins They enhance apical dominance, which promotes plants' upward growth, as opposed to lateral growth

What is the reproductive unit in angiosperms?

Flowers Stalk Pedicel Leaf

What are the four whorls of the flower arranged on?

Ovaries Stem Petals Thalamus

Why are petals unique in shape, odor, color, etc.?

Attraction Pollination Survival Protection

What is a collection of sepals?

Calyx Corolla Petals Style

Anthers and filaments form the _____

Gynoecium

Calyx

Androecium