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Leokris [45]
3 years ago
14

Who created the earliest system for the classification of animals?

Biology
1 answer:
horsena [70]3 years ago
5 0
ARISTOTLE first classified organisms.... in 4th century B.C.
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Suggest an intracellular regulatory molecule (from your text) that growth factors might stimulate to control cell division. Plea
vlabodo [156]

Answer:

E2F transcription factors  

Explanation:

The E2F transcription factors (TFs) encode intracellular factors associated with the control of the cell cycle. E2F are TFs that bind to promoter consensus sequences in order to activate transcription. These TFs control the expression of target genes involved in cell proliferation including, among others, genes for DNA replication and mitotic activation. Moreover, the E2F proteins also may act as a link between cell fate and the cell cycle. The retinoblastoma (Rb) is a protein that modulates the activity of the E2F family of TFs, and it has been shown that the Rb/E2F pathway is a key molecular mechanism associated with cell proliferation.

7 0
3 years ago
When the acetylcholine receptor sites are not occupied _____?
andre [41]
<span>Sodium channels close when not occupied

</span><span>Sodium ions diffuse through and enter the cell.
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Then they leave the cell.





The sodium diverts in the cell layer have receptor locales for acetylcholine.
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3 years ago
N a dihybrid cross for round and yellow seeds (RrYy x RrYy), what is the probability of having green and wrinkled seeds?
tigry1 [53]
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6 0
4 years ago
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What happens to a fat molecule in our digestive tract?
Gnoma [55]
The digestive system uses mechanical and chemical methods to break food down into nutrient molecules that can be absorbed into the blood. Once in the blood, the food molecules, including fat molecules, are routed to every cell in the animal's body.
5 0
3 years ago
During a trip to the Galapagos Islands, which observation led Charles Darwin to suspect that organisms change over time?
drek231 [11]

Answer:  B) Island finches resembled mainland finches, but were not the same species.

Explanation: I took the test

4 0
4 years ago
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