The table given below lists a few interactions between species and the effects that each type of interaction has on the two species involved. Interaction Species 1 Species 2 Commensalism Benefits P Q Benefits Harmed Competition R Harmed P,Q and R indicate:

P : Unaffected Q: Amensalism R : Harmed

P : Harmed Q : Mutualism R : Unaffected

P : Unaffected Q : Herebivory R : Harmed

P : Benefits Q : Symbiosis R : Benefits

In a growing population of the country,

Pre-reproductive individuals are more than reproductive individuals

Reproductive and per-reproductive individuals are equal in number

Reproductive individuals are less than the post-reproductive individuals

Pre-reproductive individuals are less than the reproductive individuals

the functional role played by organism where it lives

the range of temperature that the organism needs to live

the physical space where an organism lives

all the biological factors in the organism's environment

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Alpha Question Bank for Medical: Biology>Chapter 35 - Organisms and Populations>Exercise-3>Q 89

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If "K is the carrying capacity of the habitat, 'N' is the total number of individuals in a population with intrinsic rate of reproduction as Y, the growth rate of such a population will be directly proportional to:

I. $r$

II. $1 / N$

III. $1 / K - N$

IV. $(K - N) / K$

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Important Questions on Organisms and Populations

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Alpha Question Bank for Medical: Biology>Chapter 35 - Organisms and Populations>Exercise-3>Q 91

Accompanying pictures show the closely related species inhabiting environments varying mainly in temperatures. Which of them seems to be from the warmest habitat?

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Alpha Question Bank for Medical: Biology>Chapter 35 - Organisms and Populations>Exercise-3>Q 92

The table given below lists a few interactions between species and the effects that each type of interaction has on the two species involved.

Interaction	Species 1	Species 2
Commensalism	Benefits	P
Q	Benefits	Harmed
Competition	R	Harmed

P,Q and R indicate:

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Alpha Question Bank for Medical: Biology>Chapter 35 - Organisms and Populations>Exercise-3>Q 93

A hydrophyte showed the presence of lance shaped (narrow with pointed ends) leaves and broader heart shaped leaves in the same plant. This plant is most likely to be:

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Alpha Question Bank for Medical: Biology>Chapter 35 - Organisms and Populations>Exercise-3>Q 94

Which of the following biome is tree less

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Alpha Question Bank for Medical: Biology>Chapter 35 - Organisms and Populations>Exercise-3>Q 95

The relationship between the home range size and weight of three kinds of mammals is depicted in the graph.

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Alpha Question Bank for Medical: Biology>Chapter 35 - Organisms and Populations>Exercise-3>Q 96

A climograph of various biomes is given-below. The biomes A, B, C and D represent

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Alpha Question Bank for Medical: Biology>Chapter 35 - Organisms and Populations>Exercise-3>Q 97

If you compare adults of two herbivore species of different sizes, but from the same geographical area, the amount of faeces produced per

kg

body weight would be:

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Alpha Question Bank for Medical: Biology>Chapter 35 - Organisms and Populations>Exercise-5>Q 5

The brown lizard species (Anolis sagrei) was introduced in a habitat where the green lizard (Anolis carolinensis) dwelling. After some years, it was found that low shrubs and grasses were occupied by brown lizards while green lizards lived higher up in the trees and foliage. This is an example of niche separation due to: