Study the four statements (A-D) given below and select the two correct ones out of them. The two correct statements are
- B and C
- C and D
- A and D
- A and B
Answer
(3) A and D
Solution
A. Correct — the biological concept of species was given by Ernst Mayr, called the 'Darwin of the 20th century' in NCERT.
B. Incorrect — photoperiod affects reproduction (flowering) in plants; seasonal breeders respond to day length.
C. Incorrect — as per NCERT, the binomial nomenclature system was given by Carolus Linnaeus; R.H. Whittaker proposed the five kingdom classification.
D. Correct — as per NCERT, in unicellular organisms growth and reproduction are synonymous, since the organism grows in number by cell division.
∴ The two correct statements are A and D.
Answer: (3)