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Which of the following is correct for r-selected species?CorrectIncorrect
Which one of the following is categorised as a parasite in true sense?CorrectIncorrect
The salinity in sea water in parts per thousand (ppt) ranges betweenCorrectIncorrect
A population of 500 that experiences 55 births and 5 deaths during a one-year period. What is the reproductive rate for the population during the one-year period ?CorrectIncorrect
Within biological communities, some species are important in determining the ability of a large number of other species to persist in the community. Such species are calledCorrectIncorrect
Plants which produce characteristic pneumatophores and show vivipary belong toCorrectIncorrect
If N is the population density at time t, then its density at time t + 1 isCorrectIncorrect
Read the following statements and choose the correct option.
(i)Light is essential for life to exist on the earth.
(ii)Many species of small plants under the canopy to tall trees in forest show optimal use of available light due to having large sized antenna and higher number of thylakoids.
(iii)UV rays are not harmful to many organisms.
(iv)Photoperiodic requirement is essential for many plants for flowering.
(v)Red algae can live in deeper water of sea because of having pigment, phycoerythrin.CorrectIncorrect