What is a young dog called?

What organ in the human body has the sense of smell?

the centre/center of the nervous system

the line of linked bones running down the back of humans and many animals

the part of a plant or tree from which fruit or seed grows, often brightly coloured and sometimes including the stem on which it grows

What is the name of the virus that causes AIDS?

a part of a plant growing from the side of a stem, usually green, flat and thin, but of various shapes depending on the plant

Which biological system protects an organism from disease?

What's the name of a large animal with a long neck, that lives in the desert and has one or two humps on its back?

How many toes do most cats have on each of their front paws?

the organs in your body involved with the digestion of food

In mammals It includes the bronchi, bronchioles, diaphragm, lungs, and trachea.It has built-in methods to prevent harmful substances in the air from entering the lungs. What is it?

the part of a plant that grows under the ground and draws food and water from the soil