Plant Review

Cacti grow slowly compared to most other plants. The fact that cacti keep their stomata closed for much of the day can help explain this growth characteristic. Which of these best explains the advantage of keeping stomata closed during the day?

• It limits water loss through transpiration

• It conserves oxygen produced in photosynthesis.

• It recycles carbon dioxide within plant systems

• It protects plant tissues from predator

Plant leaves have a waxy covering called a cuticle. When some plants are stressed by lack of water, their cuticle increases in thickness. What does this action demonstrate?

• Alternation of generations in plants

• Structural response to the environment

• Differentiation of vascular tissue in plants

• Genetic mutation induced by the environment

What structure is found on top of a leaf and protects it from drying out?

• Cuticle

• Stomata

• Guard Cells

• Seed

Gardeners routinely plant Clematis vine plants and train them to climb on trellis structures.

This directional response of a plant organ to touch or to maintain physical contact with a solid object is called?

• Touch response

• Phototropism

• Thigmotropism

• Geotropism

Plants growing toward a light source is an example of-

• Negative tropism

• Gravitropism

• Phototropism

• Hydrotropism

Plants are able to bend toward a light source due to the plant hormone-

• Cholorophyll

• Phototropism

• Testosterone

• Auxin

A plant growing away from the pull gravity is an example of

• Positive tropism

• Gravitropism

• Phototropism

• Hydrotropism

Phloem allows plants to-

• Transport nutrients down from the leaves to the rest of the plant

• Take in carbon dioxide and release oxygen

• Photosynthesize

• Transport water from the roots to the rest of the plant

What is the main difference between a nonvascular and a vascular plant?

• Non Vascular plants lack tissues to transport water and nutrients and Vascular plants have a transport system

• Non Vascular plants have a transport system and Vascular plants lack tissues to transport water and nutrients

• Non Vascular plants have parenchyma, sclerenchyma, and collenchyma cells but Vascular do not

• Non Vascular plants have xylem and phloem but Vascular plants do not

The cell walls of plants are made of

• Phospholipids

• Chitin

• Cellulose

• Chlorophyll