Latest Biology General Knowledge(GK) Questions and answers

Biology - General Knowledge Questions

1 .

Plant bends towards the source of light on account of the movement of curvature known as

A)

geotropism

B)

thigmotropism

C)

chemotropism

D)

phototropism

Correct Answer : phototropism

2 .

Prothrombin which helps in clotting of blood is released by

A)

lymphocytes

B)

erythrocytes

C)

monocytes

D)

blood platelets

Correct Answer : blood platelets

3 .

Radical vascular bundles are those in which

A)

xylem is surrounded by phloem

B)

phloem is surrounded by xylem

C)

xylem and phloem occur on the same radius

D)

xylem and phloem occur on the different radii

Correct Answer : xylem and phloem occur on the different radii

4 .

Of the following taxonomic categories which is the most inclusive (i.e. is the highest in hierarchy)?

A)

Order

B)

Subspecies

C)

Class

D)

Genus

Correct Answer : Class

5 .

Poison glands of snakes are homologous to

A)

electric organs of fishes

B)

stings of rays

C)

sebaceous glands of mammals

D)

salivary glands of vertebrates

Correct Answer : salivary glands of vertebrates

6 .

Potato is a modified form (outgrowth) of

A)

root

B)

stem

C)

fruit

D)

leaf

Correct Answer : stem

7 .

Monotremes are unique mammals because they

A)

posses hair

B)

give birth to live young

C)

secret milk in a pouch

D)

lay eggs

Correct Answer : lay eggs

8 .

out of proteins, lipids and carbohydrates present in a cell membrane, what is true?

A)

Lipids are maximum

B)

Carbohydrates are minimum

C)

Carbohydrates are maximum

D)

All three are in equal proportion

Correct Answer : Carbohydrates are minimum

9 .

Monocot root differs from dicot root in having

A)

open vascular bundles

B)

scattered vascular bundles

C)

well developed pith

D)

radially arranged vascular bundles

Correct Answer : well developed pith

10 .

N2 content is kept constant in the biosphere due to

A)

N₂ fixation

B)

industrial pollution

C)

nitrogen cycle

D)

absorption of N₂

Correct Answer : nitrogen cycle

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