Q. No.In general, which of the following is not an adaptation seen in parasites in accordance with their life style?
1. Loss of unnecessary sense organs
2. Presence of adhesive organs
3. Low reproductive capacity
4. Loss of digestive system
Which type of animal tissue changes the diameter of a blood vessel?
(1) Epithelium
(2) Connective
(3) Muscle
(4) Neural
Organisms with very high intrinsic growth rates have:
1. Long generation times
2. Short generation times
3. No courtship behaviour
4. No carrying capacities
Intraspecific competition is strongest when the:
1. Species overlap in their distribution
2. Populations overlap in their ranges
3. Population is at its carrying capacity
4. Reproductive rate is at its maximum
Asymptote in a logistic growth curve is obtained, when
(1) The value of 'r' approaches zero
(2) K = N
(3) K > N
(4) K < N
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
If '+' sign is assigned to beneficial interaction, '-' sign to detrimental and '0' sign to neutral interaction, then the population interaction represented by '+' '-' refers to
(1) Mutualism
(2) Amensalism
(3) Commensalism
(4) Parasitism
When does the growth rate of a population following the logistic model equal zero? The logistic model is given as dN/dt = rN(1-N/K)
(1) when N nears the carrying capacity of the habitat
(2) when N/K equals zero
(3) when death rate is greater than birth rate
(4) when N/K is exactly one
Gause's principle of competitive exclusion states that
1. Competition for the same resources excludes species having different food preferences
2. No two species can occupy the same niche indefinitely for the same limiting resources
3. Larger organisms exclude smaller ones through competition
4. More abundant species will exclude the less abundant species through competition
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