NATURAL SCIENCE 09-10-20
The vital functions in living things
Nutrition: the organism obtains and transforms
the energy it needs for survival.
-
Animals
o
Digestion
o
Respiration
o
Transport
o
Excretion
-
Plants
o
Absorption
o
Transpiration
o
Photosynthesis
o
Respiration
Classification
of nutrition
- - Autotroph: organisms
that produce their own food. Plants are autotrophs.
- - Heterotrophs:
organisms that need other organisms for nourishment, as they are incapable of
producing their own food. Animals and fungi are heterotrophic organisms.
Reproduction: This is a function common to all
living organisms and which ensures continuity of the species.
Types of
reproduction
- -Asexual:
the simplest form of reproduction, consisting of the division of an individual
into two or more parts, each of which forms a new individual.
- - Sexual:
a new individual is formed by the joining of two sex cells or gametes.
Interaction: All living organisms interact with
their environment. The environment produces stimuli that provoke a response in
living organisms.
-
Animals:
o
They
interact with their environment to find food and defend themselves.
o
The
senses and the nervous system are directly involved in the interaction
function.
-
Plants:
o
They
respond to environmental stimuli in various ways such as moving towards the sun
or developing extensive roots.
