A. Darwin's theory B. Lamarck's theory C. genetic drift D. gene flow Correct Answer: Option B - Lamarck's theory
A. provide birds with plenty of food B. ensure their perpetuation despite predatory pressure C. search for a favourable place…
A. change the colour of their body B. raise their body temperature to become active C. fight to defend their…
A. crushing seeds B. sucking nectar C. tearing flash D. straining mud Correct Answer: Option A - crushing seeds
A. adenine → thymine and guanine → cytosine B. adenine → guanine and thymine → cytosine C. adenine → cytosine…
A. 25% B. 50% C. 75% D. 100% Correct Answer: Option B - 50%
A. non-heritable B. sex-linked C. a recessive trait D. a dominant trait Correct Answer: Option D - a dominant trait
A. person of blood group AB can donate blood only to another person of blood group AB B. persons of…
A. gonorrhoea and poliomyelitis B. typhoid and syphilis C. tuberculosis and cholera D. typhoid and cholera Correct Answer: Option D…
A. clearing farms by burning B. planting one crop type C. adding inorganic fertilizers yearly D. crop rotation and shifting…