AP Biology : Understanding Seeds, Flowers, and Fruits

Study concepts, example questions & explanations for AP Biology

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Example Questions

Example Question #1 : Understanding Seeds, Flowers, And Fruits

Which of the following is a method plants use to attract potential pollinators?

Possible Answers:

Production of a foul or sweet odor

Production of nectar in its flowers

All of these

Formation of bright or colorful flowers

Correct answer:

All of these

Explanation:

Attracting pollinators is key for many plants' success. There are a variety of strategies plants use such as the creation of nectar or odor as well as bright colors to attract pollinators. Also, some plants have ultraviolet patterns on their flowers to direct animals toward their nectar to facilitate pollination.

Example Question #2 : Understanding Seeds, Flowers, And Fruits

What strategies might a plant use to disperse its seeds?

Possible Answers:

The seeds may be blown by the wind

All of these

The seeds may float and be carried by rain or streams

The seeds may survive animal digestion and be relocated when the animal defecates

Correct answer:

All of these

Explanation:

Seed dispersal is key to plant success and plants use a wide variety of strategies to facilitate this process. Plants use all the listed strategies in order to spread their seeds. They also make seeds with adhesive properties that stick to animals that pass by. The seeds are then brushed off some time later at a different location. 

Example Question #3 : Understanding Seeds, Flowers, And Fruits

Which of the following are not a part of a flower?

Possible Answers:

Stigma

Petal

Leaf

Ovary

Anther

Correct answer:

Leaf

Explanation:

Leaves are the sites of photosynthesis. Petals are specialized leaves that help attract pollinators. The stigma collects pollen, and facilitates its passage down the style to the ovary to fertilize the ovules (eggs). Anthers produce pollen. The ovary contains a collection of 1 or more ovules.

Example Question #22 : Plant Structures

A fruit develops from the __________ of a flower.

Possible Answers:

stigma

pedicel

anther

ovary

stamen

Correct answer:

ovary

Explanation:

Once a plant is fertilized, the ovary will ripen around the developing seed of a plant and become a fruit. These fruits perform many functions including protection, provision of nutrients for the developing plant embryo, and aid in dispersal. The pedicel is the stem that connects the flower to the rest of the plant. The stigma is the sticky tip of the pistil that receives pollen from the environment. The stamen is the male section of the flower and the anther is the tip of the stamen that disperses pollen.

Example Question #4 : Understanding Seeds, Flowers, And Fruits

The primary function of the stamen is to __________.

Possible Answers:

collect water and nutrients from the soil

receive pollen in order to fertilize the ovule

produce and distribute pollen

protect the developing bud of a flower

attract pollinators

Correct answer:

produce and distribute pollen

Explanation:

The stamen is the male part of the flower which produces and distributes pollen. The female part of the flower is called the pistil and it receives pollen in order to fertilize the ovule. Roots are the structures that collect water and nutrients from the soil. Colorful petals and sugar-rich nectar are among the objects that are used are used to attract pollinators. Sepals are the leaf-like structures that protect the developing bud of a flower.

Example Question #24 : Plant Structures

Which of the following is not a function of the flower in angiosperms?

Possible Answers:

Attract pollinators

Facilitate pollination

Flowers repel predators

House reproductive structures

Correct answer:

Flowers repel predators

Explanation:

Flowers are important structures in angiosperms that facilitate reproduction. They do this by housing reproductive structures, attracting pollinators, and providing a space that permits pollination.

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