B. Oncogenes. Protooncogenes usually mutate to form oncogenes, which codes for a growth factor that is permanently activated, which leads to excessive cell division.
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Answer:
c.Endocrina
Explanation:
El sistema endocrino consta de órganos que producen sustancias químicas especiales llamadas hormonas.
Las hormonas son mensajeros químicos secretados directamente en el torrente sanguíneo que regulan diversas actividades en el cuerpo.
Por lo tanto, el sistema endocrino secreta sustancias químicas en el torrente sanguíneo.
Answer:
Mitochondria
Explanation:
The mitochondria produce ATP, also known as energy. It is coined the power house cell.
Answer:B, 4,3,1,5,2,7
Explanation:
4) The A site is aligned with the mRNA codon for the next amino acid..
3) The charged aminoacylated tRNA and elongation factor.
They are able to obtain enough oxygen because <span>they have more efficient lungs than other vertebrates.
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