PPSC Everyday Science MCQs

Splitting water during photosynthesis releases oxygen.
The gas diffuses out through stomata.

Platelets gather at damaged vessels and activate clotting.
This limits blood loss.

Chlorophyll absorbs mainly blue and red light.
Its green color results from reflected green wavelengths.

Plasma carries cells, nutrients, hormones, wastes, and proteins.
It is mostly water.

Most transpiration occurs through leaf stomata.
It helps pull water upward through xylem.

The anther is part of the stamen.
It contains pollen-producing structures.

The stigma is typically sticky or adapted to catch pollen.
It is part of the female reproductive structure.

Pollination occurs before fertilization in flowering plants.
It may be carried out by wind, insects, or other agents.

Germination begins when suitable moisture, oxygen, and temperature are available.
The embryo resumes growth.

The embryo requires energy for growth.
Respiration releases this energy from stored food.

Roots secure the plant in soil.
Root hairs increase absorption of water and minerals.

The heart contracts rhythmically to circulate blood.
It supplies tissues with oxygen and nutrients.