Living Environment Translated Arabic 2014 | Page 14

B. General Notes:
1. A cell is the smallest unit of an organism that carries on the functions
of life.
2. Anything that causes some change in an organism is a stimulus.
3. Organisms use energy to stay organized and perform activities like
homeostasis.
4. All of the changes that take place during an organism’s life are called
development.
5. Living things need a place to live, water, and food.
6. All living organisms carry out basic life processes such as respiration,
excretion, digestion, growth and development, assimilation,
reproduction, and response .
7. Spontaneous generation is the idea that living things come from
nonliving things.
8. The work of Louis Pasteur disproved the theory of spontaneous
generation.
9. Biogenesis is the theory that living things come only from other living
things.
10.A biotic factor is a living organisms in an environment- such as trees,
bacteria, animals.
11.An abiotic factor is a nonliving factor in the environment- such as
water, air, temperature.
12.Size is a limiting factor in all living things. If a cell gets too large it
must divide or die.