Archives: Questions and Answers

Sonar system is found in A) Otter B) Bat C) Whale D) Both B and C

All of the following statements are false about red blood cells that have been added to a flask of saturated NaCl solution except that A. The cells will undergo mitosis B. The cells will increase in volume C. The cell will lose water D. The cells are hypertonic relative to the surrounding medium E. The … Read more

Incomplete alimentary canal occurs in A) Fasciola B) Ascaris C) Wuchereria D) Rhabditis

ATPase enzyme needed for muscle contraction is located in (a) Actinin (b) Troponin (c) Myosin (d) Actin

What are the aquaporins in the facilitated diffusion process? A. Membrane proteins B. Carrier proteins C. Channel proteins D. Carrier lipids

What are the possible advantages and disadvantages of a chitinous exoskeleton in arthropods?

A dorsiventral leaf has a. Palisade tissue on both sides b. Spongy tissue on both sides c. Palisade tissue on the upper side and spongy tissue on the lower d. Spongy tissue on the upper side and palisade tissue on the lower

Accumulation of cells and formation of a bud at the site of amputation is A. Morphallaxis B. Reparative bud C. Blastema D. Both A and B

According to the modern theory of stomatal opening proposed by Levitt, the pH of guard cells can rise due to A. CO2 assimilation by guard cells only B. Active efflux of H+ ions by guard cells C. Conversion of starch into PEP D. Active uptake of K+ in guard cells

An ecosystem undergoes a sudden drastic change that now favors organisms with an extreme phenotype. Which one of the following is true for such an ecosystem? A. Genetic drift B. Founder effect C. Artificial selection D. Disruptive selection E. Directional selection