Science MCQs

Wind speed affects transpiration, not the direct light-dependent and light-independent reactions of photosynthesis.

While water enters by osmosis, minerals often enter against their concentration gradient via active transport.

Iodine solution turns blue-black in the presence of starch.

The pericycle is a layer of cells that gives rise to lateral (branch) roots.

Parenchyma tissue is specialized for storage.

The cohesion-tension theory describes the continuous column of water pulled upward through the xylem.

A flat and thin lamina provides a large surface area to absorb sunlight and allows CO2 to diffuse easily.

Glucose is the initial sugar produced, though it is often converted to sucrose for transport.

Xylem vessel elements are dead at maturity and lack a nucleus and other organelles.

Cohesive forces are the attractive forces between molecules of the same substance (e.g. water).