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Plant Transport and Phloem Translocation Quiz

Total questions: 20

Worksheet time: 10mins

Name
Class
Date
1.

What is the tissue that translocates assimilates from mature leaves to growing or storage organs and roots?

a)

Epidermis

b)

Cambium

c)

Phloem

d)

Xylem

2.

What is the movement of carbohydrate through the phloem from sources to sinks called?

a)

Translocation

b)

Transpiration

c)

Respiration

d)

Photosynthesis

3.

What is the carbohydrate and nutrient-rich fluid moved through the phloem called?

a)

Root pressure sap

b)

Xylem sap

c)

Phloem sap

d)

Stomatal sap

4.

Which process involves the transport of solutes from sources into sieve tubes?

a)

Unloading

b)

Loading

c)

Transpiration

d)

Photosynthesis

5.

What is the tendency toward a relatively stable equilibrium between interdependent elements, especially as maintained by physiological processes?

a)

Osmosis

b)

Active transport

c)

Homeostasis

d)

Diffusion

6.

What is the shoot:root DM ratio very quickly established under different scenarios?

a)

Homeostasis

b)

Active transport

c)

Osmosis

d)

Diffusion

7.

What is the process called when sugars are transported into the sieve elements and companion cells?

a)

Phloem loading

b)

Xylem loading

c)

Photosynthesis

d)

Transpiration

8.

What is the net effect of severe grazing on root growth?

a)

Reduction in total absorptive area of roots

b)

Increase in total absorptive area of roots

c)

Increase in soil volume explored for soil resources

d)

No effect on root growth

9.

What is the process called when sugars move from the mesophyll cell via the smallest veins in the leaf to near the sieve elements?

a)

Short distance pathway

b)

Long distance transport

c)

Symplastic route

d)

Apoplastic pathway

10.

What is the process by which plants absorb water from the soil?

a)

Osmosis

b)

Active transport

c)

Homeostasis

d)

Diffusion

11.

What is the movement of water through a plant from the roots to the leaves called?

a)

Transpiration

b)

Photosynthesis

c)

Respiration

d)

Translocation

12.

What is the process by which plants convert light energy into chemical energy to produce food?

a)

Transpiration

b)

Photosynthesis

c)

Respiration

d)

Translocation

13.

How does drought stress affect biomass partitioning in plants?

a)
  • Favors partitioning to the root

b)
  • Favors partitioning to the shoot

c)
  • Does not affect partitioning

d)
  • Reduces overall biomass

14.
  • What is the effect of severe defoliation on root growth in plants?

a)
  • Increases root growth

b)
  • Decreases root growth

c)
  • No impact on root growth

d)
  • Promotes lateral root development

15.

Which of the following is not a component of the phloem?

a)
  • Sieve tube elements

b)
  • Companion cells

c)
  • Tracheids

d)
  • Sieve plates

16.

What drives the movement of sap in the phloem according to the pressure flow model?

a)
  • Gravity

b)
  • Capillary action

c)
  • Turgor pressure

d)
  • Electrochemical gradients

17.

Which factor predominantly affects assimilate partitioning in plants?

a)
  • Soil pH

b)
  • Air humidity

c)
  • Environmental factors like light and temperature

d)
  • Leaf color

18.

In a mature plant, what typically acts as the primary source for translocation?

a)
  • Roots

b)
  • Fruits

c)
  • Flowers

d)
  • Mature leaves

19.

What defines a 'sink' in the context of assimilate partitioning in plants?

a)
  • A region producing excess carbohydrates

b)
  • A region requiring carbohydrates

c)
  • A region conducting water

d)
  • A region where photosynthesis occurs

20.

According to the Functional Balance Hypothesis, increased photosynthetic activity in the shoot should be balanced by:

a)
  • Decreased root mass

b)
  • Increased root mass

c)
  • Stagnant root growth

d)
  • Reduced nutrient uptake