Understanding Angiosperms
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AP Biology › Understanding Angiosperms
Which of the following is not a difference between monocots and dicots?
Dicots have a true flower whereas monocots do not
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
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.
Which of the following traits are specific to angiosperms?
All of these
Fruit production
Flowers
Endosperm
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.
Which of the following is true regarding seed development in angiosperms?
Seeds are enclosed within the ovary
They often exist in cone form
Seeds are "naked" and not enclosed in an ovary
Seeds develop on leaves or scales
Explanation
Angiosperm seeds are enclosed within ovaries, which prevent self-fertilization and allow for selective pollination.
Which of the following is a quality that distinguishes angiosperms from other plants?
Angiosperms have true flowers
Angiosperms have true roots
Angiosperms produce spores
Angiosperms are able to survive in aquatic environments
Angiosperms are able to reproduce vegetatively
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.
Which of the following is not a trait of angiosperms?
Unenclosed seeds
Flowering organs
Endosperm
Reduced gametophyte stage
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.
What is the female reproductive structure in angiosperms?
Pistil
Stamen
Petal
Pollen
Integument
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.