BSAA Plant Biology Review #1

Why are ribosomes often found attached to the membrane of the endoplasmic reticulum?

• One being hydrophilic and the other hydrophobic, they attract each other

• Ribosomes produce sugars converted into energy by the endoplasmic reticulum

• The function of both organelles is associated with the synthesis of proteins

• These organelles work together to transport and store water and other materials

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By what process do cells of higher plants become specialized?

• cell differentiation

• cell division

• cell elongation

• cell maturation

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Why are epidermal cells transparent?

• to allow light to pass through to inner cells

• to better diffuse carbon dioxide

• to discourage pests from devouring the leaves

• to reduce water loss by reflecting light

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Which type of plant cells play a role in photosynthesis, storage of starches, secretion, and storage of secondary metabolites?

• collenchyma cells

• epidermal cells

• parenchyma cells

• sclerenchyma cells

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Why are tracheid cells long, tapered, dead, and hollow?

• to conduct sugars throughout the plant

• to conduct water and minerals throughout the plant

• to provide strength and support for a plant

• to reduce the weight of branches and limbs

Which tissue system consists of xylem and phloem?

• dermal

• fundamental

• ground

• vascular

Which is a requirement associated with leaves as photosynthetic organs?

• All leaf cells must have direct cell-to-cell contact with the vascular tissues

• Interior leaf temperatures must fluctuate between night and day

• Leaves must receive an extended period of darkness every day

• The mesophyll cells must be continually supplied with water vapor

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Why are dicot leaves broad and flattened?

• to conserve energy required to produce thick leaves

• to increase the transportation rate through the cuticle

• to maximize the exposure of the leaf surface to light

• to reduce the mass that could cause limbs to break

Which epidermal feature of a leaf has the greatest impact on conserving water?

• bulliform cells

• cuticle

• stomata

• trichomes

What plant pigments belong to a class of molecules called flavenoids; appear red, purple, or blue, and protect plants from overexposure to ultraviolet light and extreme temperatures?

• anthocyanins

• carotenoids

• chlorophyll b

• xanthophylls