Vascular Plant Structure & Growth

The function of the vascular tissue is to...

• Secrete a substance that becomes the cuticle

• Cover the outside of a plant and protect it

• Provide support and supply materials

• Transport water and nutrients to all parts of the plant

Cohesion is a result of the hydrogen bonds that form between

• Water molecules

• Water and the xylem wall

• Tracheid cells

• Vessel elements

The figure shows a cross section thru a tree. What does each ring represent?

• One winter of growth

• One year of growth

• Five years of growth

• Ten years of growth

The functions of plant stems include providing support, transporting water and minerals, and

• Taking up water from soil

• Forming a vascular cylinder

• Storing food and water

• Exchanging gases

Which leaf adaptations occur to minimize water loss in both deserts and cold dry climates?

• Plump leaves that store water

• Large and broad leaves

• Needles and spines

• Compound and double compound leaves

The upper surfaces of leaves are used mainly for...

• Light gathering

• Gas exchange

• Collecting water

• Protection from predators

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Water loss is not a problem for what group of plants?

• Desert plants

• Aquatic plants

• Cold-climate plants

• Dry-climate plants

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What is the function of the plasmodesmata?

• They support and protect plants

• They allow cells to share materials

• They store starch, oils, and water

• They carry out photosynthesis

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Trees do not have a structure that pumps out fluids like a heart. How do fluids move from the roots to the leaves of trees without a pump?

• The properties of water move fluids up trees.

• Trees do not need to transport fluids.

• Water is pushed when pressure is applied to the roots.

• Hydrogen bonds are stronger in trees than in animals.

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What would happen if a plant’s vascular system contained only xylem?

• The vascular system would stIll function normally

• The vascular system would be made of mostly photosynthesizing cells

• The vascular system would be unable to transport water and dissolved mineral nutrients

• The vascular system would be unable to transport the products of photosynthesis

Tags

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