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Question (11)

QN008099

A farmer wants disease-free banana plants in large numbers quickly. Which technique is most suitable?

(A) Seed sowing
(B) Layering
(C) Tissue culture
(D) Pollination

Correct Answer: C

Explanation:

Tissue culture helps mass production of healthy banana plants.

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Question (12)

QN008100

Yeast reproduces asexually mainly by

(A) fragmentation
(B) budding
(C) binary fission
(D) pollination

Correct Answer: B

Explanation:

Yeast reproduces by budding.

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Question (13)

QN008101

In hydra, the small outgrowth formed during reproduction is called

(A) embryo
(B) zygote
(C) spore
(D) bud

Correct Answer: D

Explanation:

The outgrowth in hydra is called a bud.

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Question (14)

QN008102

A hydra develops three buds simultaneously. If each bud separates successfully, how many hydra organisms will finally exist including the parent?

(A) 2
(B) 3
(C) 4
(D) 6

Correct Answer: C

Explanation:

1 parent + 3 buds = 4 hydra organisms.

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Question (15)

QN008103

Bread mould reproduces mainly through

(A) seeds
(B) spores
(C) buds
(D) pollen grains

Correct Answer: B

Explanation:

Bread mould reproduces through spores.

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Question (16)

QN008104

Why are spores effective reproductive structures?

(A) They contain roots and shoots
(B) They are heavy and remain fixed
(C) They are produced in huge numbers and spread easily
(D) They require pollinators

Correct Answer: C

Explanation:

Spores are lightweight and produced in large numbers.

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Question (17)

QN008105

A moist bread slice kept in a warm dark place develops mould after 3 days. Which condition mainly helped rapid fungal growth?

(A) Dryness and cold
(B) Warmth and moisture
(C) Bright sunlight
(D) High wind speed

Correct Answer: B

Explanation:

Warm and moist conditions favour fungal growth.

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Question (18)

QN008106

Refrigeration slows spoilage of food because low temperature

(A) increases spore formation
(B) increases fungal metabolism
(C) slows reproduction of microbes
(D) destroys nutrients in food

Correct Answer: C

Explanation:

Low temperature slows microbial reproduction.

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Question (19)

QN008107

If one mould colony produces 2 million spores and only 0.01% germinate successfully, approximately how many spores germinate?

(A) 2
(B) 20
(C) 200
(D) 2000

Correct Answer: C

Explanation:

0.01% of 2,000,000 = 200.

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Question (20)

QN008108

Which of the following organisms mainly reproduces through budding?

(A) Amoeba
(B) Hydra
(C) Rhizopus
(D) Fern

Correct Answer: B

Explanation:

Hydra reproduces through budding.

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Question (11)

A farmer wants disease-free banana plants in large numbers quickly. Which technique is most suitable?

Explanation:

Link:

Question (12)

Yeast reproduces asexually mainly by

Explanation:

Link:

Question (13)

In hydra, the small outgrowth formed during reproduction is called

Explanation:

Link:

Question (14)

A hydra develops three buds simultaneously. If each bud separates successfully, how many hydra organisms will finally exist including the parent?

Explanation:

Link:

Question (15)

Bread mould reproduces mainly through

Explanation:

Link:

Question (16)

Why are spores effective reproductive structures?

Explanation:

Link:

Question (17)

A moist bread slice kept in a warm dark place develops mould after 3 days. Which condition mainly helped rapid fungal growth?

Explanation:

Link:

Question (18)

Refrigeration slows spoilage of food because low temperature

Explanation:

Link:

Question (19)

If one mould colony produces 2 million spores and only 0.01% germinate successfully, approximately how many spores germinate?

Explanation:

Link:

Question (20)

Which of the following organisms mainly reproduces through budding?

Explanation:

Link:

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