B. The layering of the rock.
Happy to help. Please mark as brainliest!
PCB (Poly-Chlorinated Biphenyls) are the major contaminants of groundwater that must be removed before circulating water among people. PCBs can also enter the food chain by contaminating aquatic organisms. Working on PCBs and removing it from water is a challenging process. Various processes are involved in removal of these contaminants from the groundwater. Among these one is the use of microorganisms. Microbial process is a potent bioremediating method.
DEGRADATION OF PCBs through microorganisms is an effective process as PCBs are susceptible to degradation. PCBs are transformed into smaller parts by microorganisms that make them more soluble and easily degradable.
The rate of reaction in chemistry tells us how fast a reaction will occur from start to end.
From what I know, Its simply an outside force that kills an unsuspecting population, so do with that as you will, im only a highschool fetus
The correct answer is: d. Lethal dominant alleles are harmful whether they are carried in homozygous or heterozygous form, so there is always strong selection against these alleles.
Lethal alleles cause the death (prenatal or after birth, but usually early in development) of the organism that carries them. There are three types of lethal alleles:
• Recessive-both alleles must be defective,
• Dominant-it is sufficient that one allele is lethal to cause the death,
• Conditional depending on the gene or genes involved.
Lethal alleles are usually a result of mutations in genes essential for development of an organism.