Explanation

Blood group A can have genotypes IAIA (homozygous) or IAi (heterozygous).

Since IAIA is one valid genotype for blood group A.

Explanation

Trypsin works best in a basic (alkaline) environment like the small intestine.

The stomach is highly acidic, which inhibits trypsin’s activity.

Explanation

When an acid reacts with a base, a neutralization reaction occurs.

This produces salt and water as the main products.

Explanation

Plants have a transport system (xylem and phloem) to move water, minerals, and food throughout the plant.

This system ensures that all parts get the nutrients and water needed for growth and survival.

Explanation

When dilute acids react with many metals, they produce hydrogen gas.

For example:

2HCl + Zn → ZnCl2 + H2.

Explanation

Atomic mass = number of protons + number of neutrons → 2 + 1 = 3.

Electrons do not contribute significantly to atomic mass.

Explanation

A neuron is the basic structural and functional unit of the nervous system

It often shown with a long axon, dendrites, and cell body.

It transmits electrical impulses in the body.

Explanation

Magnification refers to increasing the size of an image or object.

It is commonly used in optics, like microscopes or lenses, to enlarge small details.

Explanation

Sodium carbonate (Na₂CO₃) is commonly known as soda ash.

It is used in glass making, detergents, and water softening.

Explanation

Evaporation is the process where liquid water turns into water vapour due to heat.

It is a key part of the water cycle, occurring from surfaces like oceans, lakes, and soil.