Darwinian fitness is represented by:
1. Low r value
2. High r value
3. High K value
4. Low K value
Subtopic: Â Life History Variations |
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Under a particular set of selection pressures, organisms evolve towards the most efficient:
1. Thermoregulation
2. Water conservation
3. Respiration
4. Reproduction strategy
Subtopic: Â Life History Variations |
 62%
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Which of the following is correct for r-selected species?
(1) Large number of progeny with small size
(2) Large number of progeny with large size
(3) Small number of progeny with small size
(4) Small number of progeny with large size
Subtopic: Â Life History Variations |
 71%
NEET - 2016
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Evolution of population
(1) Maximizing Reproductive fitness
(2) Low r value
(3) Minimizing Darwinian fitness
(4) Both B and C
Subtopic: Â Life History Variations |
 76%
From NCERT
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Semelparity is a reproductive strategy also known as "big bang" reproduction. This is because the single reproductive event of semelparous organisms is usually large as well as fatal. A classical example is seen in:
1. Most perennial plants
2. Mollusks
3. Pacific salmon
4. Humans
1. Most perennial plants
2. Mollusks
3. Pacific salmon
4. Humans
Subtopic: Â Life History Variations |
 71%
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Most birds and mammals:
| 1. | breed many times during their lifetime and produce a small number of large-sized offspring. |
| 2. | breed only once during their lifetime and produce a small number of large-sized offspring. |
| 3. | breed many times during their lifetime and produce a large number of small-sized offspring. |
| 4. | breed only once during their lifetime and produce a large number of small-sized offspring. |
Subtopic: Â Life History Variations |
 74%
From NCERT
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Identify the correct statements:
| I: | Pacific salmon and bamboo breed many times during their lifetimes. |
| II: | Birds and mammals breed many times during their lifetimes and produce a small number of large-sized offspring. |
| III: | Oysters and pelagic fishes produce a large number of small-sized offspring. |
| 1. | Only I and II | 2. | Only I and III |
| 3. | Only II and III | 4. | I, II and III |
Subtopic: Â Life History Variations |
 89%
From NCERT
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