(I) Speciation
(II) Mass extinction
(III) Adaptive radiation
Choose the correct answer:
Long-term evolutionary patterns are influenced by significant events and processes that operate on broad timescales. Let's examine the given factors:
All three processes—speciation, mass extinction, and adaptive radiation—are recognized as major drivers that shape the large-scale patterns of evolution observed over long periods. Speciation generates biodiversity, mass extinctions cause major turnovers, and adaptive radiation fills the resulting ecological space.
Therefore, all the listed items (I), (II), and (III) are relevant.
Considering the role of each process:
All these factors significantly influence the long-term patterns of evolution.
The correct option includes all three: (I), (II), and (III).
The frequency of homozygotes in a diploid population is 0.68. Assuming that the population is in Hardy-Weinberg equilibrium, the frequencies of the two alleles are
Convergent evolution creates:
Given below are the possible reasons of high probability for extinction of species:
(i) Increased homozygosity of alleles
(ii) Increased heterozygosity of alleles
(iii) Decreasing population sizes
(iv) Increasing demographic stochasticity
(v) Decreasing environmental stochasticity
Which one of the following options represents the correct combination of reasons that can lead to the highest probability of extinction of species?
Given below are proposed analogous structures among organisms.
A. wings of birds and bats
B. wings of bats and tetrapod digits
C. tendrils of Vitis and tendrils of pumpkin
D. tubers of potatoes and sweet potatoes
E. fins of fish and flippers of a whale
Which one of the following options correctly states the analogous structures?
According to Hamilton's rule, 'r' is the coefficient of relatedness between two interacting individuals, 'B' is the benefit to thr recipient and 'C' is the cost to the donor. Which of the following relationships will result in an altruistic behaviour?