Life on Earth BIOLOGY - Life on Earth

Human beings give out carbon dioxide through –

Green plants are –

A unicellular organism is made up of –

…………. is the condition when living beings are no longer alive.

The average life span of a cat is ………….. years.

The ………….. of an organism is the time between its birth and death.

The stem of a plant grows towards the source of ………….

The reaction which an organism produces towards a stimulus is called …………..

A few gram seeds are soaked in water for a few hours. These seeds absorb water and become bigger in size. Can you say that seeds are showing growth ? Why ?

A car engine uses petrol and oxygen to run. It gives off carbon dioxide and: smoke as waste from its exhaust pipe? Can you cad the car a living thing ? Why ?

What isim anaerobic respiration?

Reproduction is the characteristic feature of –
a. plants only.
b. animals only.

You are travelling in a car with all the windows closed in winter. After a while you notice a mist forming on the windows. This mist is made up of tiny droplets of water. Where did they come from ?

What is respiration ? What are the various stages it involves?

What are autotrophs ? How do they differ from heterotrophs ?

How is the movement of a non-living thing different from that of a living being ?

How does growth in unicellular organisms differ from growth in multicellular organisms ?

Why do animals move from one place to another?

Explain how plants and animals excrete waste products.

Name three unicellular animals.

What is the difference between respiration and breathing ?

Differentiate between plants and animals.