Slides in this set
There is a range of temperatures within
which organisms can grow and
successfully reproduce. Above or below
that range reproduction doesn't occur
even if the organism survives.
· The environmental
temperature affects the
rate of enzyme-controlled
reactions in plants and
· Some animals have evolved
physiological features that
help them to control their
body temperature.…read more
In water currents, organisms
have to flow with the current,
be strong swimmers or be
able to hang on tight and
resist the force of the water.
Wind and water currents
· Wind increases water and heat loss from the
body and adds to the environmental stress an
organism has to cope with.
· Fewer species can survive in prevailing winds.
· Currents are most damaging to populations
when the strength increases suddenly, e.g.
The availability of water is affected
by several factors such as the
amount of precipitation, the rate of
evaporation and edaphic factors.
· If water stress becomes too severe, the
organisms will die unless they have special
adaptations to help them survive and
· An increase in water availability can lead to a
huge change in a habitat and to a massive
increase in population size of some organisms.…read more