Evoultion is the change of the allele frequencies and the inherited traits of a population over time.
The idea of evolution is that the species change over time. The proposed mechanism of evolution is natural selection. Natural selection favors inheritable trait, suitable for survival and reproduction. Organisms with such traits will tend to leave more offspring than others, and thus will evolve over time.
Answer:
B) decreased chromatin condensation
Explanation:
The addition of acetyl groups to the histone tails results in a less packed state of chromatin. The acetylation of multiple Lys residues in the amino-terminal domains of histones H3 and H4 reduces the affinity of the entire nucleosome for DNA. It occurs since acetylation reduces the total positive charge present on histone proteins. Histone proteins are positively charged and pack the negatively charged DNA around them. Therefore, increased acetylation results in decreased condensation of chromatin. The loosely packed DNA is accessible by RNA polymerase and transcription factors for gene expression.
In natural selection, genotype variations that will increase the chance of survival and reproduction of some organism are preserved and will be inherited. If there is no variation, then all individuals have the same chance to survive and nothing will be particularly selected.
B is the answer to this question...
Answer:
Energy Distribution provides products for commercial consumption first. The most common media used to distribute energy are steam, air, hydronics and electricity. These form of media creates products such as the electric power that offer services and career advancement opportunities and Hydronics that delivers home and industries heating technology that give comfort to people and organizations.
Moreover, the steam also provides products that is generated from factories, mines, locomotives or trains and steamboats, which then eventually provides transportation, minerals, food and pharmaceuticals for commercial consumption.
