The genes involved in pattern formation and organization of body parts are called homeobox genes, which are a large family of similar genes.
The h<span>omeobox genes direct the formation of many body structures during early development of the embryo. </span>
Answer: (B) Paracrine signaling
Explanation: Paracrine signaling occurs between cells that are relatively within a short distance apart. The signaling triggers quick responses and can last only for a short period of time because of the wearing-off of the paracrine ligands (neurotransmitters).
Cells that exhibit paracrine factors release them into the immediate extracellular environment.
Nucleus is the answer
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Explanation:
In many cases, DNA viruses utilize cellular enzymes for synthesis of their DNA genomes and mRNAs; all viruses utilize normal cellular ribosomes, tRNAs, and translation factors for synthesis of their proteins.