b. False
True
Africa experiences a high level of air pollution because it has more old vehicles on the road than industrialized regions do. This fact is because of the less availabilty of new technologies, due to poverty and other socio-political factors. The environment will likely suffer more too, compromising ever more a region that suffers from different problems.
B) gene duplication
C) histone modifications
D) random point mutations
Answer:
A) exon shuffling
Explanation:
Exon shuffling refers to the process of evolution of a new gene that consists of unique combinations of preexisting exons. These novel combinations of preexisting exons are formed when the interspersed repeats of introns of two different genes undergo the process of recombination.
The process of exon reshuffling is responsible for the presence of common domains between two otherwise different proteins of eukaryotes.
Example: Tissue plasminogen activator and epidermal growth factor are very different proteins but share the EGF domain.
B. decrease the amount of nonrenewable resources available.
C. be very explosive.
D. increase the chances of a volcanic eruption.
A. release toxic elements into the groundwater or surface water.
Some viruses uses Lysogenic cycle to insert the viraldna into the host cell dna before it enters a lytic cycle.
The lysogenic cycle also referred to as nonvirulent infection, includes the virus integrating its genome with the genome of the host cell in order to replicate without destroying the host. An example is the structure of a bacteriophage. To reproduce, the phage should first penetrate the host cell.
The lysogenic cycle is characterized by The phage infecting a bacterium and inserting its DNA into its chromosome, enabling the phage DNA (now known as a prophage) to be replicated and transferred on alongside the cell's own DNA.
The lytic cycle includes virus reproduction by utilizing a host cell to produce more viruses, which then ruptured out of the cell. The viral genome is incorporated into the host cell genome during the lysogenic cycle, infecting it from within.
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