The five main external factors that must be present or provided t sustain life are:
1. Water
2. Oxygen
3. Food
4. Atmospheric temperature
5. Atmospheric pressure
<span>The human body needs water, food and oxygen in order the body functions to work properly.
</span>Not every temperature is temperature at which the human can live. For example: we can not stay alive long period of time at temperature of 60 degrees Celsius.
There would be no seasons.
Answer:
frequency of action potentials
Explanation:
Answer:
<h3>Moving water also picks up and carries particles of soil and rock. The ability to erode is affected by the velocity, or speed, of the water. ... As water slows, larger particles are deposited. As the water slows even more, smaller particles are deposited.</h3>
Explanation:
Ans.
Cell-to-cell communication allows signalling of essential substances between the plant cells, which are surrounded by cell walls. The molecules used by plants for long-distance signalling are known as hormones, such as auxin, ethylene, and gibberelin.
These hormones are secreted by one plant cell and received by another plant cell, where it exerts it affect. Thus, the correct answer to be fill in the blank is 'option A). hormones.'
