Ques 1. Which of the following best describes sympatric speciation ?
A. Speciation that occurs due to geographic isolation
B. Speciation that occurs in the same geographic region without
physical separation
C. Speciation that occurs due to migration to a new habitat
D. Speciation that occurs through gradual accumulation of small
changes over time
Ans. B
Ques 2. Which of the following causes typhoid fever ?
A. Salmonella typhi
B. Mosquito
C. Plasmodium
D. Nicotine
Ans. A
Ques 3. Which scientists are credited with proposing the transpiration
pull theory, also known as the cohesion-tension theory?
A. Charles Darwin and Francis Darwin
B. Stephen Hales
C. Henry Dixon and John Joly
D. Ernst Münch
Ans. D