Because natural selection can only increase or decrease frequency of alleles that already exist in the population
Explanation:
Un estimulo es cualquier cambio que es capaz de producir una respuesta por parte del organismo. Los receptores son estructuras muy especializadas capaces de percibir los estímulos y convertirlos en impulsos nerviosos
DNA is the same in every cell in the body. They all read from the same genetic blueprint, whether they are muscle cells, skin cells, or heart cells.
it is Because they use the same set of genes in different ways, and these cells are different. So despite the fact that every one of our cells has the equivalent of 20,000 or so genes, every cell can choose which ones it needs to "turn on" and which ones it needs to keep "turned off. heart cells have unexpected attributes in comparison to skin cells since heart cells express unexpected genes in comparison to skin cells.
Know more about DNA here: brainly.com/question/264225
#SPJ4
Answer:
True
Explanation:
Amino acids are coded from the DNA sequence in groups of three bases, that is, three bases (three letter codes) also called codon codes for (or specifies) an Amino acid.
in the above DNA sequence each of the prospective 6 Amino acids will each require a triplet of bases. Thus, the simple calculation of 6×3 yields 18. Thus we need at least 18 bases in our DNA sequence, barring stop codon, to code for Amino acids.
Counting, the above DNA sequence contains 18 bases exactly.
Answer:
many breast cancers have no obvious symptoms at all. When there are no symptoms, breast cancer can be found through a screening mammogram. The most important thing is to bring any unusual signs to your doctor's attention, and to talk to your doctor about a breast screening plan that is appropriate for you
Explanation:
