Answer:
Mechanical barriers — which include the skin , mucous membranes , and fluids such as tears and urine — physically block pathogens from entering the body. Chemical barriers — such as enzymes in sweat , saliva , and semen — kill pathogens on body surfaces.
Answer:
strength: it provides raw material for plants and major component of food.
weaknesses: it increases earth's temperature and change the habitat.
Explanation:
The diagram shows the carbon cycle which is important cycle present on the earth. This carbon is present in carbondioxide form which is used as a raw material by plants in order to make their own food. This carbon is also present in different organic compounds. When its concentration increases in the atmosphere, the temperature of the atmosphere increases and many areas are not suitable to live for many plants and animals.
After looking at the graph represented above, I think I habe recognized the correct answer, <span> so the statement which would best predict the population in generation 4 is being shown in the first option : </span><span>The nonresistant aphid would become extinct. As you can see from the tree pictures, nonresistant ones gradually become lower and lower and in the last one it has the same weak position as resistant in the first picture, then I would say that nonresistant will expire soon.
Hope that helps!</span>
The p53 gene is a recessive tumor suppressor gene which functions as a key regulator for the cell cycle. In the event when only one p53 allele is mutated then the function of the p53 gene will persist and apoptosis (programmed cell death) will proceed if there are significant gene mutations in the cell. If two p53 alleles are mutated then the cell will not receive the signal to apoptose even with significant mutations and cancer will develop.
Wound healing the natural way the body heals or restores broken tissues due to injury. Wound healing consists of four phases: hemostasis, inflammation, proliferation and maturation. During the proliferation stage, epithelialization, fibroplasia and angiogenesis occur during this stage. This is the stage wherein the growth of new tissue occurs.
