What are life processes?

Why is there a controversy about whether the viruses are truly alive or not?

• Because viruses are invisible

• viruses do not move at all

• viruses show movement only when they infect some cell

What are life processes?( In the context of your syllabus)

• The processes of eating, talking, watching T.V, playing and sleeping

• The processes of enjoying our life

• The processes which work together to maintain our body functions.

What do you mean by the term nutrition?

• The process of transferring a source of energy from outside the body of the organism to inside.

• The process of removing energy from inside the body of the organism to outside

• The process of studying about different kinds of food.

The process of breaking down of food to release energy and using them for cellular needs is called

• excretion

• Nutrition

• Respiration

• Digestion

Why are there no specific organs in amoeba, for taking in food, exchange of gases or removal of wastes because

• They are multicellular organisms so all cells are in direct contact with surrounding

• They are unicellular organisms ,so the entire surface of organism are in direct contact with surrounding

Using visible movement as the defining characteristics of life is not enough because

• Living things do not move

• Some movements in living things are not visible to us like molecular movements

Which of the following is not a life process?

• Skeletal system

• Nutrition

• Respiration

• Transportation

• Excretion

Which of the following is the correct definition of respiration?

• Taking in oxygen and giving out carbon dioxide

• breaking down of food to release energy for cellular needs

Why is diffusion insufficient to meet the oxygen requirements of multicellular organisms like humans?

• Because all the cells of our body ,are not in direct contact with surrounding environment

• Because multicellular organisms need more oxygen

Why is there , a controversy about whether viruses are truly alive or not?

• Because viruses are not talking to us

• Because viruses do not show any molecular movement until they infect some cell.