Which of the following is a contributing reason behind emerging disease?

a. the lack of evolution in hostsb. the overuse of antibioticsc. the absence of migration or travel in organismsd. the lack of evolution in pathogens

The correct answer is option B. The overuse of antibiotics.

Now-a-days use of antibiotics is very common. The antibiotic is used to kill the disease causing pathogen, but the overuse and the senseless use of the antibiotics cause the pathogen to develop antibiotic resistance. once, the antibiotic resistance is developed, the infection cannot be cured by that antibiotic, which is the main cause of increase in the diseases in society.

good one: produce hormones that plants grow.

bad one: the problem with organic matter is that while plant nutrients are needed for crop growth, they can also stimulate excessive growth of the wrong plants – mainly, algae.

c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.