A carbon atom has 4 valence electrons
<span>-The nervous system processes information from receptors that detect changes in the environment.
-The nervous system coordinates the systems of the body.
-The nervous system sends out appropriate responses to react to changes in the environment.
-The nervous system maintains homeostasis.</span>
Answer:
Microscopic ecosystems consist of the organisms that are microscopic in nature or that which cannot be seen by naked eyes. They are mostly found in soil oceans and some are even living in association with plant and animals.
Macroscopic ecosystem consist of the organisms that can be observed with naked eyes.
They are mainly of 3 types:
- Terrestrial
- Aquatic
- Aerial.
Answer:
Muscles contract rapidly to produce heat on a cold day.
Explanation:
