Answer:
Cancer is unchecked cell growth. Mutations in genes can cause cancer by accelerating cell division rates or inhibiting normal controls on the system, such as cell cycle arrest or programmed cell death. As a mass of cancerous cells grows, it can develop into a tumor.
Explanation:
"An organism in which the two copies of the gene are identical — that is, have the same allele — is called homozygous for that gene. An organism which has two different alleles of the gene is called heterozygous."
Answer:
Primary active transport directly uses a source of chemical energy (e.g., ATP) to move molecules across a membrane against their gradient.
Answer:
D. Trees grow back after a forest fire.
Explanation:
<h2>Se denomina fuentes de energía no renovables a aquellas que se encuentran en la naturaleza en cantidades limitadas. No se regeneran o lo hacen en forma extremadamente lenta. Fuentes de energía no renovables son los combustibles fósiles y los isótopos radiactivos utilizados en la energía nuclear.</h2>
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