Answer:
<em>In a population, natural selection acts on phenotype of individuals.</em>
Explanation:
Natural selection tends to favour those organisms of a population which carry traits that allow them to be better adapted to the environment and these traits are passed on to their offsprings. Natural selection tends to act on the phenotype of the population whereas evolution is the phenomenon which changes the allele frequencies. Natural selection acts on individual organisms of a population whereas the change in populations, on the whole, arises due to evolution.
1. The waste products of plant cells are carbon dioxide, water and oxygen. The carbon dioxide which is release during respiration is used up by photosynthesis process. The oxygen which is a by product of photosynthesis exist the plant cells through the stomata and root cell wall. Plant cells get rid of excess water via transpiration and guttation.
2. Protein synthesis within the cell is divided into two major phases, the transcription and the translation stages. In the transcription stage, the genetic information inside the DNA which is located inside the nucleus is transcribed into the mRNA, which then move out of the nucleus into the cytoplasm. In the cytoplasm, mRNA attached to the surface of the ribosomes and initiates the translation stage of protein synthesis. With the aid of tRNA and other elongation factors, a protein chain will be build up until a termination codon is reached, where the growing polypeptide chain will be terminated. The protein is then transported to the golgi apparatus which package the protein and send to the appropriate locations.
Which of the following statements about the secondary structure of a tRNA molecule is true? It has more double-stranded than single-stranded regions It has more single-stranded than double-stranded regions Its single-stranded and double-stranded regions are about the same
Telomeres contain many genes that encode DNA polymerases. True False
Answer:B C D I think because a lysosome is a organelle
Explanation:
Answer:
When two or more organisms have the same type of physical features in them, it shows that the organisms might have evolved from a common ancestor. Such structures are known as homologous structures.
For example, the forelimbs of humans, birds, whales and dogs have the same kind of structural anatomy. Although, their functions might be different but their structures are similar. This similarity depicts that the organisms might have a common ancestor in the past.