Answer:
Heterotroph obtain chemical energy from other organisms.
Explanation:
Heterotroph are the organisms which are unable to make their own food like plants. They get energy from feeding on other animals. Some animals are herbivores which feed on plants and take energy from it. Some organisms feed on herbivores are called carnivorous animals. Some animals are omnivores which feed on both plants and animals.
Examples of heterotrophic organisms are cow, lion and human etc.
Answer:
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The study of all the interactions between organisms and the living and nonliving components of their environment is
Ecology
It's the 4 the answer I hope it has served you
These chemical substances released to the synaptic cleft are known as neurotransmitters
example
dopamine
