Q11
In which condition the gene ratio remains constant for any species?
Correct Answer
Option B
Solution
(b) Random mating is required to maintain Hardy-Weinberg equilibrium.
Evolution
Q12
Which of the following is most important for speciation?
Correct Answer
Option B
Solution
(b) Reproductive isolation is most important for speciation.
Q13
Two different species cannot live for long duration in the same niche. This law is
Correct Answer
Option B
Solution
(b) Gause's competitive exclusion principle: two species competing for the same niche cannot coexist.
Q14
Sequence of which of the following is used to know the phylogeny?
Correct Answer
Option B
Solution
(b) rRNA genes are ancient, distributed over all lineages of life, used to infer phylogeny.
Q15
Which of the following are homologous organs?
Correct Answer
Option B
Solution
(b) Wings of birds and pectoral fins of fish have same basic structure and origin — homologous.
Q16
Among the human ancestors the brain size was more than 1000 cc in
Correct Answer
Option D
Solution
(d) Homo neanderthalensis had brain capacity 1300-1600 cc.
Q17
What was the most significant trend in evolution of modern man (Homo sapiens) from his ancestors?
Correct Answer
Option D
Solution
(d) Increasing brain capacity is the most significant trend in human evolution.
Q18
The extinct human who lived 1,00,000 to 40,000 years ago, with short stature, heavy eyebrows, retreating foreheads was
Correct Answer
Option B
Solution
(b) Neanderthals lived in Eurasia until about 40,000 years ago.
Q19
Which of the following had the smallest brain capacity?
Correct Answer
Option C
Solution
(c) Homo habilis had the smallest brain capacity (550-687 cc).
Q20
Which of the following structures is homologous to the wing of a bird?
Correct Answer
Option D
Solution
(d) Wings of a bird and flippers of a whale are both modified forelimbs — homologous organs.
Ready for a full NEET mock test?
Timed · full syllabus · instant results
Take a Mock Test →