Biology - Comprehensive Mock Test 50

Question 491 Medium

The maximum amount of water that a soil can hold, by capillary action is called ?

A) Wilting point B) Water potential C) Field capacity D) Osmotic potential

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Question 492 Easy

Plant succession occurring in a sandy area is ?

A) Xerosere B) Halosere C) Psammosere D) Hydrosere

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Question 493 Medium

In an ecosystem Biotic factors affect the survival of an organism in that ecosystem. They include ?

A) competition for food and water B) competition for shelter C) co-operation to help find food D) All of these

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Question 494 Medium

Which of the followings take part in symbiosis of lichen?

A) Fungus-Fungus B) Alga-Alga C) Alga-Fungus D) Fungus-Gymnosperm

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Question 495 Medium

In a population, if the rate of addition of new members is higher than the rate of individuals lost, it shows ?

A) Exponential growth B) Declined growth C) Zero population growth D) none of these

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Question 496 Medium

Competition is severe in a population that has a distribution which is ?

A) Random B) Uniform C) Irregular D) Non-random

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Question 497 Medium

When one animal copies the appearance, actions, or sounds of another animal to avoid predators, it is called ?

A) Mimicry B) Commensalism C) Competition D) Symbiosis

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Question 498 Easy

Competition is most severe between two ?

A) Distantly related species growing in the same habitat B) Closely related species growing in the same habitat C) Closely related species growing in different niches D) Distantly related species growing in different niches

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Question 499 Medium

Which of the followings is not the characteristic of the anatomy of xerophytes?

A) Well developed conducting tissue B) Spongy parenchyma C) Thick cuticle D) Well developed mechanical tissue

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Question 500 Medium

The abundance of a species population within its habitat is called ?

A) Relative density B) Regional density C) Absolute density D) Niche density

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