Development of unrelated groups of animals along parallel lines in adaptation to a similar environment is called:
✓
Adaptive convergence
B
Adaptive radiation
C
Adaptive divergence
D
Adaptive induction
Answer
Correct option: A.
Adaptive convergence
When different groups of animals show similar adaptations due to similar environmental conditions, it is called convergent evolution, which is caused by adaptive convergence.
In general, in the developmental history of a mammalian heart, it is observed that it passes through a two$-$chambered fish$-$like heart, three$-$chambered frog$-$like heart and finally to four$-$chambered stage. To which hypothesis can this above cited statement be hypothesis can this above cited statement be approximated?
There is an irregular mating population. If the frequency of an autosomal recessive lethal gene is $0.4,$ then the frequency of the carriers in a population of $200$ individuals is:
Which of the following evidences are related to Darwin finches?
A
Fossils
B
Embryology
C
Anatomy
✓
Optimum utilization of resources.
Answer
Correct option: D.
Optimum utilization of resources.
Darwin finches occupy different niche with in the same geographical area and the distribution is primarily decided by the differences in diet of birds.
The closest relative of modern man is considered to be:
✓
Chimpanzee
B
Orangutan
C
Apes
D
Gibbon
Answer
Correct option: A.
Chimpanzee
Various lines of evidence indicate that our closest relatives are chimpanzees, followed by gorillas and then orangutans, and then gibbons. The closest relative of modern man is considered to be chimpanze on the basis of:
Appearance of antibiotic$-$resistant bacteria is an example of:
A
Adaptive radiation.
B
Transduction.
✓
Pre$-$existing variation in the population.
D
Divergent evolution.
Answer
Correct option: C.
Pre$-$existing variation in the population.
Adaptive radiation is related to evolution of different designs for a single organ according to varied needs of different groups. Transduction is related to transfer of viral or bacterial genetic material. Divergent evolution is related to homologous organs.
Hence, option $'c\ ’$ is correct.
There are two alleles $\mathrm{A}_1$ and $\mathrm{A}_2$, out of which, one $\mathrm{A}_1$ has nil abundance in a population, then the abundance of second allele $\mathrm{A}_2$ is:
The idea that life originates from preexisting life is referred as:
✓
Biogenesis theory
B
Special creation theory
C
Abiogenesis theory
D
Extraterrestrial theory
Answer
Correct option: A.
Biogenesis theory
Biogenesis means life comes from pre existing life, as in modern earth. Now life comes from pre$-$existing life only but life actually evolved from non living components abiogenetically.