BIOLOGY [2 Mark Question Answer]

There are four types of teeth:

1. Incisors - These are used for cutting.
2. Canines - These teeth are used for tearing.
3. Premolars - For masticating the food.
4. Molars - For grinding and masticating the food.

Holophytic nutrition is the nutrition in which organisms prepare organic food in their body from simple inorganic materials like carbon dioxide, water, etc. whereas in holozoic nutrition, the animals survive by consuming other organisms.

Holozoic nutrition is a nutrition in which animals survive by consuming other organisms whereas saprozoic nutrition is the nutrition in which the animals absorbs soluble organic nutrients from dead and decaying organic matter.

Autotroph is an organism which prepares organic food in their body from simple inorganic materials like carbon dioxide, water, etc. whereas heterotroph is an organism which cannot prepare its own food and depends on ready-made food synthesized by green plants.

Parasites are the organisms that live in or on the body of another organism called host, and obtain nourishment from its body whereas saprophyte is an organism that absorbs soluble organic nutrients from dead and decaying organic matter.

The organisms that feed on plants only are termed as herbivores.

Examples - sheep, cow, goat, etc.

The organisms which feed on all kinds of plant and animal food are called omnivores.

Examples - Cockroach and human beings.

The organisms which feed upon other animals and animal products.

Examples - tiger, lion, cat, etc.

The organisms which cannot prepare their own food and depends on ready-made food synthesized by green plants are called heterotrophs.

Examples - animals and human beings.

These are the organisms which prepare organic food in their body from simple inorganic materials like carbon dioxide, water, etc.

Example - green plants and certain protests.

Nutrition can be defined as the process which involves the utilization of food by an animal to obtain energy for growth and development.