Life Processes Test

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Life Processes Test - 92

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Question 1
1 / -0

Choose the correct answer from the alternatives given.
Blood flows through blood vessels because of:

A
Its viscosity

B
Establishment of a pressure gradient

C
Elasticity of the veins

D
Length of the blood vessels

Solution

Blood flows in the same direction as the decreasing pressure gradient: arteries to capillaries to veins. Hence it can be also said that blood flows through blood vessels because of the establishment of a pressure gradient. The heart is from where the pressure is generated for blood throughout the body.
So, the correct option is 'Establishment of a pressure gradient'
Question 2
1 / -0

The number of nephrons in a kidney is equal to

A
The number of Bowman's capsules

B
The sum of Bowman's capsule and malpighian bodies

C
The sum of Bowman's capsules and glomeruli

D
Double the number of Bowman's capsules

Solution

Each nephron has a blind cup shaped structure called Bowman's capsule. Bowman's capsule encloses glomerulus and is a site of ultrafiltration. Therefore, the number of nephrons in kidney is equal to the number of Bowman's capsule. Malpighian body (renal corpuscle) is a collective term used for Bowman's capsule and its glomerulus.
Question 3
1 / -0

Birds and mammals have:

A
Single and closed type circulation

B
Double and open type circulation

C
Double and closed type circulation

D
Single and open type circulation

Solution

Birds and mammals have four-chambered hearts. Their circulatory system is called the double circulatory system because blood passes through the heart twice:
Body $$\rightarrow$$ Heart $$\rightarrow$$ Lungs $$\rightarrow$$ Heart $$\rightarrow$$ Body
Birds and mammals have a closed type of circulation wherein the blood does not directly come in contact with the cells or tissues but instead flows in tube-like structures called the arteries, veins, and capillaries.
So, the correct answer is option C.
Question 4
1 / -0

Given is an animal followed by three terms or features. Choose the term which does not match with the animal.
Amoeba.

A
Nucleus

B
Tentacle

C
Food vacuole

D
None of the above

Solution

The amoeba is a single-celled microscopic organism (about 0.3 mm across). It has cytoplasm, nucleus, cell membrane, food vacuole and straight narrowing tentacles (pseudopods). It exhibits all the essential functions of any living organism.

So the correct answer is option B.
Question 5
1 / -0

Plant X is a vascular and invasive plant species that grows densely over the surface of a lake at a very high rate, due to pollution in water. It has been linked to oxygen depletion of the water, in spite of the fact that it is photo-synthetic.
Which of the following accounts for this contradiction?

A
While being photosynthesis, X consumes oxygen at a faster rate than it releases the same, because of its high rate of growth

B
Because X is highly invasive, it incorporates a large quantity of oxygen in its biomass

C
When X dies, the bacteria that decompose its dead body consume the oxygen dissolved in water and grow rapidly

D
None of these
Question 6
1 / -0

Succus entericus is the secretions of
A. Villi
B. Crypts of Lieberkuhn
C. Brunner's gland
D. Goblet cells

A
A and B

B
B and C

C
A and C

D
B and D
Question 7
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The water lost by transpiration is:

A
Pure water

B
Rich in dissolved salts

C
Rich dissolved minerals

D
Rich in carbohydrates

Solution

For carrying out photosynthesis, plants absorb water from the soil and it is transported to the leaves through the xylem vessels. After photosynthesis, the excess water is released from the leaves through the small pores present on the leaves called stomata. This process is called transpiration. The plant loses most of its absorbed water by this process. The minerals which were taken in by the roots, along with water is absorbed by the plant and the water which is released through transpiration is effectively pure water.
So, the correct answer is option A.
Question 8
1 / -0

Which of the following cation is associated with high blood pressure?

A
Calcium

B
Iron

C
Sodium

D
Magnesium

Solution

The correct answer is C (sodium)
High sodium levels is associated with increase in blood pressure because presence of excess sodium increases the water retention , This results in more pressure on the blood vessels .
Question 9
1 / -0

People suffering from high blood pressure should take which of the following precautions to avoid an excessive rise in their blood pressure?

A
Sleep as much as possible

B
Avoid standing

C
Increase their body weight

D
Avoid emotional disturbances and excitement

Solution

High blood pressure (hypertension) is a condition in which the force of the blood against the artery walls is too high. High blood pressure can cause blood vessel damage that leads to heart disease, kidney disease, stroke, and other problems.
Reacting to stress in high blood pressure can increase the risk of heart attacks and strokes due to the increase of blood flow in blood vessels.
So, avoiding stress is one of the precautions for persons having high blood pressure.
Hence, the correct answer is option D.
Question 10
1 / -0

Aquatic animals and plants are able to survive in water because

A
They use oxygen dissolved in water for respiration.

B
Water contains 0.7% of dissolved oxygen.

C
Dissolved oxygen is taken inside their body by specially designed organs like gills and by general body surface in plants.

D
All are correct

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Re-Attempt Weekly Quiz Competition

Life Processes Test - 92

Result

Life Processes Test - 92

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SHARING IS CARING

Question 1

Its viscosity

Establishment of a pressure gradient

Elasticity of the veins

Length of the blood vessels

Solution

Question 2

The number of Bowman's capsules

The sum of Bowman's capsule and malpighian bodies

The sum of Bowman's capsules and glomeruli

Double the number of Bowman's capsules

Solution

Question 3

Single and closed type circulation

Double and open type circulation

Double and closed type circulation

Single and open type circulation

Solution

Question 4

Nucleus

Tentacle

Food vacuole

None of the above

Solution

Question 5

While being photosynthesis, X consumes oxygen at a faster rate than it releases the same, because of its high rate of growth

Because X is highly invasive, it incorporates a large quantity of oxygen in its biomass

When X dies, the bacteria that decompose its dead body consume the oxygen dissolved in water and grow rapidly

None of these

Question 6

A and B

B and C

A and C

B and D

Question 7

Pure water

Rich in dissolved salts

Rich dissolved minerals

Rich in carbohydrates

Solution

Question 8

Calcium

Iron

Sodium

Magnesium

Solution

Question 9

Sleep as much as possible

Avoid standing

Increase their body weight

Avoid emotional disturbances and excitement

Solution

Question 10

They use oxygen dissolved in water for respiration.

Water contains 0.7% of dissolved oxygen.

Dissolved oxygen is taken inside their body by specially designed organs like gills and by general body surface in plants.

All are correct

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