Biology (NTSE Stage-2 (National-Level) Scholastic-Aptitude & Language Comprehension): Questions 33 - 37 of 63

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Question number: 33

» Biology » Plant and Animal Nutrition

MCQ▾

Question

One of the most resistant known biological materials is

Choices

Choice (4) Response

a.

Lignin

b.

Sporopollenin

c.

Lignocellulose

d.

Hemicellulose

Question number: 34

» Biology » Reproduction

MCQ▾

Question

Seeds are called the products of sexual reproduction due to

Choices

Choice (4) Response

a.

It can survive for longer periods

b.

It gives rise to new plants

c.

Formation by fusion of pollen tubes

d.

Are formed by fusion of gametes

Question number: 35

» Biology » Human Body

MCQ▾

Question

Which one of the following is called pacemaker of the heart?

Choices

Choice (4) Response

a.

AV septum

b.

Chordae tendinae

c.

AV node

d.

SA node

Question number: 36

» Biology » Micro-Organisms

MCQ▾

Question

Barley is ground to powder. The powder is mixed with water and some yeast. The mixture is kept in a closed and moist container. Which of the following will be produced?

Choices

Choice (4) Response

a.

Ethyl alcohol and carbon dioxide

b.

Alcohol only

c.

Sodium bicarbonate

d.

Carbon dioxide only

Question number: 37

» Biology » Plant and Animal Nutrition

MCQ▾

Question

A few gram seeds were placed in each of the three pots A, B and C containing soil. The soil in pot A is mixed with some green twigs and leaves. The soil in pot B is mixed with old cow dung while soil of pot C is mixed with urea. Pots are watered regularly. Which of the following will be observed after 10 days?

Choices

Choice (4) Response

a.

Very little growth in A but lot of growth in B and C

b.

Lot of growth in B but very little growth in C

c.

Lot of growth in A

d.

Not much growth in B

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