NSO Level 1- Science Olympiad (SOF) Class 12: Questions 42 - 45 of 60

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Question number: 42

» Biology » Ecology

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MCQ▾

Question

Who put forth the Phylogenetic system of classification?

Choices

Choice (4)Response

a.

George Bentham

b.

Theophrastus

c.

Carolus Linnaeus

d.

Adolf Engler and Karl Prantl

Question number: 43

» Biology » Biology in Human Welfare

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Assertion-Reason▾

Question

Assertion (Ꭺ)

In response to infection or vaccine person’s own cells produce antibodies and it develops Active immunity.

Reason (Ꭱ)

Example of Active immunization is injection of snake antivenom against snake bite.

Choices

Choice (4)Response

a.

Ꭺ is true but Ꭱ is false

b.

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

c.

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

d.

Ꭺ is false but Ꭱ is true

Question number: 44

» Biology » Ecology

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MCQ▾

Question

Which phenomenon is seen in both Cyclic and non-cyclic phosphorylation during the light reaction of photosynthis?

Choices

Choice (4)Response

a.

PS I and PS II pigment systems

b.

NADPH formation

c.

ATP formation

d.

O2 release

Question number: 45

» Biology » Reproduction

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MCQ▾

Question

CuT is an intrauterine contraceptive device. What is the role of Cu from the statements given below?

Choices

Choice (4)Response

a.

Cu ions are responsible for making cervix hostile to sperms

b.

Motility of sperms and their fertilizing capacity is suppressed by Cu ions

c.

Uterus is made unsuitable for implantation by Cu ions

d.

All of the above

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