Chapter 17: Plant Structure and Nutrient Support

Clicker Questionsby Kris Curran, University of Wisconsin-Whitewater

Which part of a plant evolved to help the plant acquire water and nutrients?

1. Roots2. Stems3. Leaves4. All of the above

Roses typically have five petals. Therefore, we would categorize these plants as:

1. Bryophytes2. Mosses3. Monocots4. Dicots

Plants regulate water loss and gain in the ________________ located in the leaves while most metabolic activities occur in the ___________, part of the ground tissue.

1. xylem; collenchyma2. guard cells; sclerenchyma3. phloem; parenchyma4. guard cells; parenchyma

In a carrot plant, food is stored in a structure called a ___________ root and in cells called ___________ cells.

1. fibrous; parenchyma2. fibrous; collenchyma3. tap; parenchyma4. tap; collenchyma

Which part of the stem contains undifferentiated cells?

1. Cortex2. Apical meristem3. Xylem4. Phloem5. Vascular

bundles

Which example below is NOT a stem?

1. Onion bulb2. White potato3. Tree trunk4. Sweet potato5. Daffodil bulb

Which leaf cells below are photosynthetic?

1. Guard cells2. Xylem3. Palisade cells4. Spongy

mesophyll cells5. 3 and 46. All of the above

Which structure(s) can act as a seal to decrease water loss from the leaf due to evaporation?1. Thick cuticle2. Stomata with guard

cells3. Leaf hairs4. 1 and 25. All of the above

When humans compost their food waste they are creating a type of soil called ________, which is rich in organic materials.1. Humus2. Clay3. Sand4. Silt

Which answer is a usable form of nitrogen for plants that is produced by bacteria?

1. Nitrogen gas2. Nitrogen oxide3. Ammonia4. Nitrates5. 3 and 46. All of the above

Cohesion-tension theory explains how the polarity of water molecules helps in their transport from the roots to the top of the plant. Why are minerals also transported in this fashion?

1. The minerals are charged and therefore dissolved in the water.

2. The minerals are light in weight and therefore carried upward by the flow of the water.

3. The minerals are moved through the phloem.4. Minerals are collected from the air and travel

down through the xylem to the roots.

Classroom Catalyst

Celery Water Transport

If we were to repeat this experiment, which growing condition would lead to the fastest migration of colored water to the leaves when compared to our original experiment?1. Fill the glass three quarters full

of water.2. Keep the glass of water + celery

in cooler, dark room.3. Keep the glass of water + celery

in a warmer, well-lit room.4. Fill the glass with warm water.

Where does the pressure for the pressure-flow mechanism come from?1. Active transport of sugars into the

phloem.2. Diffusion of water into phloem that

is high in sugar.3. Pumps in the leaves that drive the

phloem away from sites of photosynthesis.

4. A combination of 1 and 2.5. All of the above.