AP BIOLOGY

ECOLOGY

ENERGY FLOW AND THE FOOD CHAIN

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Every living thing, or organism, needs energy in order to live-including you! Every time an animal runs, jumps or does anything, it uses energy. Animals get energy from the food they eat.A food chain shows who’s eating what. It’s a sequence that tells us how living things are connected through the food they eat. A plant or animal gives energy to, or gets energy from, the plants or animals connected to it.Which of these organisms needs energy to live?
A
a mouse
B
a maple tree
C
a person
D
all of the above
Explanation: 

Detailed explanation-1: -Answer. Answer: all of these (i.e) a mouse, a maple tree, a person .

Detailed explanation-2: -The food chain describes who eats whom in the wild. Every living thing-from one-celled algae to giant blue whales-needs food to survive. Each food chain is a possible pathway that energy and nutrients can follow through the ecosystem. For example, grass produces its own food from sunlight. A rabbit eats the grass.

Detailed explanation-3: -A heterotroph is an organism that eats other plants or animals for energy and nutrients. The term stems from the Greek words hetero for “other” and trophe for “nourishment.” Organisms are characterized into two broad categories based upon how they obtain their energy and nutrients: autotrophs and heterotrophs.

Detailed explanation-4: -Animals get their energy from the food they eat. Animals depend on other living things for food. Some animals eat plants while others eat other animals. This passing of energy from the sun to plants to animals to other animals is called a food chain.

Detailed explanation-5: -A food chain outlines who eats whom. A food web is all of the food chains in an ecosystem. Each organism in an ecosystem occupies a specific trophic level or position in the food chain or web. Producers, who make their own food using photosynthesis or chemosynthesis, make up the bottom of the trophic pyramid.

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