B1 - Characteristics of LIving Cells

Question 1

Define nutrition

Answer 1

Taking in of materials for energy, growth and development; plants require light, carbon dioxide, water and ions; animals need organic compounds and ions and usually need water.

Question 2

Define Excretion

Answer 2

Removal from organisms of the waste products of metabolism (chemical reactions in cells including respiration), toxic materials, and substances in excess of requirements.

Question 3

Define respiration

Answer 3

Chemical reactions which break down nutrient molecules in living cells to release energy. For metabolism.

Question 4

Define sensitivity

Answer 4

The ability of organisms to detect or sense change in the internal environment (stimuli) and to make appropriate responses.

Question 5

Define reproduction

Answer 5

The process which make more of the same kind of organism.

Question 6

Define movement

Answer 6

An action by an organism causing a change of position or place.

Question 7

Define growth

Answer 7

The permanent increase in size and dry mass by an increase in cell number or cell size or both.