AP Biology : Plant Biology
Study concepts, example questions & explanations for AP Biology
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Example Questions
Example Question #1 : Classes Of Plant
Which of the following best describes the pith: a tissue type present in vascular plants?
It contains no parenchyma cells
Pith is located in leaves
It is a tissue in non-vascular plants that transports nutrients throughout the plant
It is a tissue in vascular plants that transports nutrients throughout the plant
It is a tissue in vascular plants that transports nutrients throughout the plant
Pith is a type of tissue located in the stems of vascular plants. It stores and transports nutrients throughout the plant. The pith is composed of parenchyma cells.
Example Question #1 : Understanding Angiosperms
What is the female reproductive structure in angiosperms?
Pistil
Petal
Pollen
Stamen
Integument
Pistil
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 : Classes Of Plant
Which of the following is a quality that distinguishes angiosperms from other plants?
Angiosperms are able to reproduce vegetatively
Angiosperms have true roots
Angiosperms have true flowers
Angiosperms are able to survive in aquatic environments
Angiosperms produce spores
Angiosperms have true flowers
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 : Classes Of Plant
Which of the following is not a difference between monocots and dicots?
Dicots can have secondary (radial, horizontal) growth whereas monocots cannot
Monocot embryos have one cotyledon where dicot embryos' have two cotyledons
Dicots have a true flower whereas monocots do not
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 have a true flower whereas monocots do not
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 #1 : Understanding Angiosperms
Which of the following traits are specific to angiosperms?
All of these
Flowers
Endosperm
Fruit production
All of these
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 #2 : Understanding Angiosperms
Which of the following is true regarding seed development in angiosperms?
Seeds develop on leaves or scales
They often exist in cone form
Seeds are "naked" and not enclosed in an ovary
Seeds are enclosed within the ovary
Seeds are enclosed within the ovary
Angiosperm seeds are enclosed within ovaries, which prevent self-fertilization and allow for selective pollination.
Example Question #2 : Understanding Angiosperms
Which of the following is not a trait of angiosperms?
Endosperm
Unenclosed seeds
Flowering organs
Reduced gametophyte stage
Unenclosed seeds
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.
Example Question #3 : Plant Biology
Which of the following structures is unique to plant cells?
Mitchondria
Vacuoles
Lysosomes
Endoplasmic reticulum
Chloroplasts
Chloroplasts
Chloroplasts are organelles in plant cells that conduct photosynthesis; therefore they are unique to plant cells. All the other mentioned organelles can be found in both animal and plant cells.
Example Question #4 : Plant Biology
Which of the following can be found in plant cells, but not animal cells?
Chloroplasts
Mitochondria
Ribosomes
Cell membrane
Chloroplasts
Chloroplasts, the site of photosynthesis, are only in plant cells and are not found in animal cells. Ribosomes, a cell membrane, and a mitochondria, however, can be found in both animal and plant cells.
The other structure that may be found in plant cells, but not animal cells, is a cell wall.
Example Question #1 : Plant Biology
Where in the chloroplasts does the Calvin Cycle of photosynthesis take place?
Thylakoid membrane
Intermembrane space
Grana
Thylakoid lumen
Stroma
Stroma
The Calvin Cycle occurs in the stroma, the aqueous fluid-filled area of the chloroplast. The stroma can be seen as analogous to the cytoplasm of a cell, in that it is the liquid in which all other substructures reside. The other processes of photosynthesis, the light-dependent reactions, take place in the thylakoid, a membrane-bound substructure within the chloroplast.
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