AP Biology : Understanding Angiosperms

Study concepts, example questions & explanations for AP Biology

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Example Questions

Example Question #1 : Understanding Angiosperms

What is the female reproductive structure in angiosperms?

Possible Answers:

Stamen

Pollen

Petal

Integument

Pistil

Correct answer:

Pistil

Explanation:

Angiosperms are flowering plants. They have both male and female reproductive organs.

The pistil is the female reproductive structure, and consists of three parts. The stigma is the sticky knob used to catch pollen. It is situated at the top of the style, while the ovary contains egg cells and is located below the style. 

The stamen is the male reproductive structure, and consists of two parts. The anther produces pollen, and the filament helps in holding up the anther.

Example Question #1 : Understanding Angiosperms

Which of the following is a quality that distinguishes angiosperms from other plants?

Possible Answers:

Angiosperms produce spores

Angiosperms have true roots

Angiosperms are able to reproduce vegetatively

Angiosperms are able to survive in aquatic environments

Angiosperms have true flowers

Correct answer:

Angiosperms have true flowers

Explanation:

The production of a true flower is one of the defining characteristics of an angiosperm. In fact, angiosperms are also called "flowering plants." Groups of plants that are not angiosperms (think ferns, ginkgos, or pine trees) can have roots and spores and are able to survive in aquatic environments and reproduce vegetative.

Example Question #2 : Understanding Angiosperms

Which of the following is not a difference between monocots and dicots?

Possible Answers:

Monocot embryos have one cotyledon where dicot embryos' have two cotyledons

Monocot veins are parallel whereas dicot veins are branched

The vascular bundle tissue of monocots is arranged in a ring whereas in dicots the vascular bundle tissue has no particular pattern

Dicots can have secondary (radial, horizontal) growth whereas monocots cannot

Dicots have a true flower whereas monocots do not

Correct answer:

Dicots have a true flower whereas monocots do not

Explanation:

Both monocots and dicots are angiosperms which means that they both have true flowers. All of the other answer choices are true differences between monocots and dicots.

Example Question #3 : Understanding Angiosperms

Which of the following traits are specific to angiosperms?

Possible Answers:

Endosperm

Fruit production

Flowers

All of these

Correct answer:

All of these

Explanation:

Angiosperms are a class of land plant that produces seeds. Angiosperms can be distinguished from gymnosperms by characteristics that include flowers, the presence of endosperm, and fruit production.

Example Question #4 : Understanding Angiosperms

Which of the following is true regarding seed development in angiosperms?

Possible Answers:

Seeds are enclosed within the ovary

Seeds are "naked" and not enclosed in an ovary

Seeds develop on leaves or scales

They often exist in cone form

Correct answer:

Seeds are enclosed within the ovary

Explanation:

Angiosperm seeds are enclosed within ovaries, which prevent self-fertilization and allow for selective pollination.

Example Question #5 : Understanding Angiosperms

Which of the following is not a trait of angiosperms?

Possible Answers:

Flowering organs

Unenclosed seeds 

Endosperm

Reduced gametophyte stage

Correct answer:

Unenclosed seeds 

Explanation:

Angiosperms have certain characteristics that distinguish them from gymnosperms including flowering organs, endosperm, and a reduced gametophyte stage. Additionally, angiosperms possess closed seeds that are surrounded by the ovary.

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