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klio [65]
3 years ago
13

In any food chain or web, the original source of energy is _______. the sun. Earth. the producers.

Biology
1 answer:
AfilCa [17]3 years ago
8 0
The sun because of photosynthesis in plants, then herbivores who eat plants then the carnivores who eat the herbivores who ate the plants.
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Which of the following is NOT a freshwater ecosystem? a . a river b . a lake c . an estuary d . a stream
JulijaS [17]
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8 0
3 years ago
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Which is a characteristic of all vertebrates?
Bond [772]

The presence of vertebral column or notochord at any stage of life in any organism is the characteristic of vertebrate.

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Humans embryo has notochord which becomes a vertebral column.

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6 0
2 years ago
How can identical twins be distinguished with forensic serology?
Inga [223]
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3 years ago
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