Practice MCQ Questions and answers on Biology-GK

1

The phenomenon of summer sleep by animals is called

A) Hibernation B) Aestivation C) Laziness D) Lethargy

Discuss

Answer & Solution

Answer: Option B

Solution:

Aestivation is a state of animal dormancy, similar to hibernation, although taking place in the summer rather than the winter.

2

Animals who have constant body temperature are

A) Homeothermic B) Hemothermic C) Hematology D) Histology

Discuss

Answer & Solution

Answer: Option A

Solution:

Animals who have constant body temperature are homeothermic.

3

Which type of cell, skin is made up of:

A) Epidermal cells B) Connective tissue C) Permanent tissues D) Parenchyma

Discuss

Answer & Solution

Answer: Option A

Solution:

Skin is made up of epidermal cells.

4

Cold blooded animals are known as

A) Homiotherms B) Eurytherms C) Endotherms D) Poikilotherms

Discuss

Answer & Solution

Answer: Option D

Solution:

Cold blooded animals are known as Poikilotherms.

5

Ginger is a stem and not a root because

A) It stores food B) It lacks chlorophyll C) It has nodes and internodes D) None of the above

Discuss

Answer & Solution

Answer: Option C

Solution:

Ginger is a stem which can be differentiated from root because it
(1) Grows parallel to ground.
(2) Stores food.
(3) Lacks chlorophyll.
(4) Has nodes and internodes.

6

Which of the following plants produce only seeds but no fruit?

A) Sugarcane B) Peanut C) Cycas D) Almond

Discuss

Answer & Solution

Answer: Option C

Solution:

Cycas and Pinus are Gymnosperms, those have seeds but not fruits or flowers.

7

Consider the following plant
1. Guava
2. Mint
3. Sweet potato
The roots of which of these plants bear adventitious buds that developed into new individuals under favourable conditions.

A) 1 and 2 B) 2 only C) 3 only D) 1, 2 and 3

Discuss

Answer & Solution

Answer: Option C

Solution:

The roots of sweet potato bear adventitious buds that developed into new individuals under favourable conditions.

8

Potato is a

A) Root B) Stem C) Bud D) Fruit

Discuss

Answer & Solution

Answer: Option B

Solution:

Potatoes are stem tubers. Enlarged stolons thicken to develop into storage organs. The tuber has all the parts of a normal stem, including nodes and internodes.

9

The "eyes" of potato tubers are

A) Shoot buds B) Flower buds C) Root buds D) Axillary buds

Discuss

Answer & Solution

Answer: Option D

Solution:

The axillary buds of the potato tuber are called “eyes” in common language. They are found at the nodes of the stem tuber.

10

Which of the following is responsible for transport of food and other substances in plants?

A) Xylem B) Phloem C) Chloroplast D) None of these

Discuss

Answer & Solution

Answer: Option B

Solution:

The food which is prepared by the process of photosynthesis in the leaves of a plant has to be transported to other parts like stem, roots, branches etc. Therefore this food is transported to other parts of the plant through a kind of tubes called phloem.