NEET (NTA)-National Eligibility cum Entrance Test (Medical) Biology: Questions 591 - 593 of 3511

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Question number: 591

» Ecology and Environment » Biodiversity and Its Conservation » Loss of Biodiversity

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MCQ▾

Question

Those species whose populations have been seriously depleted and whose ultimate security is not assured are known as

Choices

Choice (4) Response

a.

Rare species

b.

Vulnerable species

c.

Treatenened species

d.

Endangered species

Question number: 592

» Plant Physiology » Photosynthesis » Photorespiration C3 and C4 Pathways

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MCQ▾

Question

Aerobic respiration is more advantageous to a large organism than anaerobic respiration, because aerobic respiration

Choices

Choice (4) Response

a.

Releases more energy from an equal amount of nutrients.

b.

produced oxygen as a waste product

c.

does not require molecular oxygen and hydrogen

d.

does not require sunlight

Question number: 593

» Structural Organization in Animals and Plants » Plant Tissues - Morphology, Anatomy and Functions » Stem

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MCQ▾

Question

In wood dicotyledons, the arrangement of vessels is either diffuse porous or ring porous or ring porous. Based on these data, which one of the following statements is correct?

Choices

Choice (4) Response

a.

Although diffuse porous vessels are not specialized as ring porous vessels, they conduct more water at all periods and through new xylem vessels added gradually during development.

b.

Diffuse porous vessels carry more water and also faster because of a greater number of small vessels having greater capillary force.

c.

Ring porous vessels are specialized and are used for conducting more water for a shorter period only, when tyloses occur early in the vessels.

d.

Ring porous vessels conduct more water as they are formed early during development, when the need for water is great.