Homework-Lecture 3

•If a plant and an animal have the same weight then the rate of catabolism is …………

In plant is equal to the animal
In plant is less than in the animal
In plant is more than in the animal
In plant is way more than in the animal

•Which of the following organisms don’t have a specialized excretion system………..

Human
Monkey
corn plant
salamander

Which of the following figures represents the diffusion of most oxygen gas during night in a plant leaf ?

A
B
C
D

•Through which of the following processes the plant gets rid of the excess water?

Catabolism.
Guttation
Exudation
Respiration

•Which of the following statements doesn’t agree with the excretion process in plant ?

Cuticle layer that covers the epidermis doesn't prevent the transpiration.
The rate of excretion isn't associated with the rate of catabolism.
The hydathodes are permanently opened all over the year.
The leaf stomata are opened and closed during the day.

if four seedlings are put in four glass tubes, each tube contains 200 cm3 of water, the tubes were left for two days at the same environmental conditions as illustrated in the following figures, which seedling of them whose leaves are covered by paraffin wax ?

A
B
C
D

•All the following factors can cause the increase of transpiration rate in the plant, except

the increase of light intensity.
the opening of stomata.
the increase of temperature.
the increase of atmospheric humidity.

•Which of the following caused the opposite figure?

Increase in potassium
Decrease in calcium
Increase in calcium
All of the above

•The excess water can be excreted in the herbaceous plants through all the following, except the

stomatal transpiration.
lenticular transpiration.
cuticular transpiration.
guttation

•The opposite graph illustrates the factor (X) that affects the rate of transpiration, what do you expect this factor to be?

Humidity of the atmosphere
Light intensity.
The temperature.
All of the above

•what is the result of the decreased number of leaves in some desert plants ?

The rate of photosynthesis increases.
The lenticular transpiration decreases.
The stomatal transpiration decreases.
The pulling up of water increases.

•What is the result of planting tomato plant in a soil of high humidity ?

Decreasing the rate of guttation.
Increasing the rate of transpiration.
Increasing the rate of nitrogenous wastes excretion.
Decreasing the rate of photosynthesis.

•The guttation is done by the leaf only, while the transpiration can be done by the leaf and the stems

Both statements are correct
The first statement is correct the second is wrong
The first statement is wrong the second is correct
Both statements are wrong

•What is the factor that helps in leaving of CO2 gas from stomata of the plant leaves?

Increasing its diffusion rate.
Decreasing the catabolism rate of carbohydrates.
Its transferring abundantly from the phloem to the mesophyll tissue.
Increasing the rate of photosynthesis process.

•How can the plant face the hot environmental conditions ?

It increases the respiration process.
It decreases the photosynthesis process.
It stops the transpiration process.
It increases the water absorption.

•Transpiration water is characterized from the guttation water by all the following, except ……….

it is free of any substance.
it exits with large amounts.
it exits from the stomata in the form of vapour.
the plant doesn't control its exit.

•There is no specialized excretion system in plant and that is due to

Reuse consume wastes
It gets rid of excess water by transpiration
Its wastes is not considered as a danger to it
All of the above

The following table illustrates some characteristics of four different plants that grow in the same environmental conditions, which one of the plants loses the highest amount of water ?

A
B
C
D

•The plant gets rid of carbon dioxide by diffusion. Every amount of carbon dioxide resulting from metabolism is excreted outside and the plant does not benefit from it.

Both statements are correct
The first statement is correct the second is wrong
The first statement is wrong the second is correct
Both statements are wrong

•Which of the following represents a similarity between guttation and transpiration processes ?

Products
Function.
Time of occurrence.
Position of its occurrence.

•The following figure illustrates a plant stem before and after several hours, which of the following environmental conditions can cause the change that is illustrated in front of you ?

The decrease in available water for the plant.
The decrease in light intensity.
The increase in atmospheric humidity.
The decrease in water and light together.

•The leaves of saguaro cactus are characterized by being reduced, that helps in …

reducing the water loss.
increasing the respiration process.
increasing the photosynthesis process.
reducing water absorption.

Which of the following graphs illustrates the rate of transpiration of a plant along the day ?

A
B
C
D

•Which of the following plants has the highest rate of transpiration ?

Elodea
Bean
Spiny fig.
Cactus.

•Which of the following is(are) not considered from the excretory products of the plant ?

Oxygen
Water
Carbon dioxide
Amino acids.

Homework-Lecture 3

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