Answer: a) relies on the uptake of an external signal molecule from the cell
Explanation: Signal transduction is known as the transmitting of any signal of a molecule from exterior of cell to interior of cell.This technique is termed as critical is taken care of successful transmission of signal effectively and positive result and reception is done by the cell surface receptors.It is also known as cell signalling. Thus,option(a) is the correct option of all.
Answer:
A basic condition of nature which means that the quantities of available labor, capital, land and entrepreneurship used for the production of goods and services are finite
Explanation:
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Living things differences are important because it helps classify and signify one from another
Correct do not use fossil fuels is the answer
