Small number of progeny with large size
Small number of progeny with small size
Large number of progeny with large size
Large number of progeny with small size
r-selected species are the ones that are found in the sparsely crowded ecological niche to exploit it and aim at the production of a large number of small-sized progeny with lower survival rates due to the short gestation period and early attainment of maturity. k-selected species are characterized by exponential growth in population size till carrying capacity of the niche only. These species produce a small number of large-sized progeny and have longer gestation periods to allow proper embryological development. Therefore, the correct answer is option D.