NSO Level 1- Science Olympiad (SOF) Class 12: Questions 46 - 48 of 60

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Question number: 46

» Biology » Reproduction

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MCQ▾

Question

There is a reduction in anterior pituitary function in a man which causes decrease in sperm production and low testosterone levels. He is given testosterone only. Will the sperm production start being normal?

Choices

Choice (4)Response

a.

No because administered testosterone will not work in normal environment of body.

b.

No because FSH from Sertoli cells is required for stimulation of spermatogenesis.

c.

Yes it will act locally on Leydig’s cells.

d.

Yes there will be positive feedback sent by testosterone for LH production.

Question number: 47

» Biology » Ecology

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MCQ▾

Question

Scientist observed population interaction pattern between two plant species and they concluded that:

  1. B species is benefited from species A but, species A is harmed.

  2. There is temporary or permanent contact between species A and B.

  3. Species B show higher productivity when they are alone compared to when grown near species A.

Which type of population interaction is it?

Choices

Choice (4)Response

a.

Commensalism

b.

Parasitism

c.

Mutualism

d.

Amensalism

Question number: 48

» Biology » Ecology

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MCQ▾

Question

Which of the following substance is obtained from plant roots and is used as coffee substitute and additive?

Choices

Choice (4)Response

a.

Milk powder

b.

Cardamom powder

c.

Chicory powder

d.

Cinnamon powder

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