NSO Level 1- Science Olympiad (SOF) Class 12: Questions 5 - 8 of 60

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Question number: 5

» Biology » Ecology

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Assertion-Reason▾

Question

Assertion (Ꭺ)

The variety which is developed by pure line selection can be characterized by complete phenotypic uniformity in different environments.

Reason (Ꭱ)

From a single homozygous plant a pure line variety is developed by self-pollination

Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

b.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

c.

Ꭺ is true but Ꭱ is false

d.

Ꭺ is false but Ꭱ is true

Question number: 6

» Biology » Ecology

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MCQ▾

Question

Moistened mustard seeds and water were filled in a bottle; screw capped tightly and kept in a corner. After about half an hour it blew up suddenly. The phenomenon involved is

Choices

Choice (4) Response

a.

Diffusion

b.

Imbibition

c.

Osmosis

d.

Reverse Osmosis

Question number: 7

» Biology » Reproduction

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MCQ▾

Question

Which of the following statements are correct for ZIFT procedure?

Choices

Choice (4) Response

a.

Zygote is collected from female donor and transferred to the fallopian tube.

b.

Zygote is collected from female donor and transferred to the uterus.

c.

Ova are transferred to uterus after collecting from female donor.

d.

For Zygote formation ova are collected from female donor and are transferred to the fallopian tube.

Question number: 8

» Biology » Biology in Human Welfare

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MCQ▾

Question

When does a person experience recurring chill and fever while suffering from a disease caused by Plasmodium?

Choices

Choice (4) Response

a.

When in spleen, sporozoites released from RBC are killed rapidly and broken.

b.

When maximum growth reached by trophozoites and certain toxins are given out.

c.

When the parasite after rapid multiplication inside RBC ruptures them and releasing stage that will enter fresh RBC.

d.

When WBCs destroy microgametocytes and megagametocytes

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