The answer should be genes.
During the past 100 years, the major causes of death have shifted from INFECTIOUS DISEASES to CHRONIC DISEASES.
About a century ago, most diseases were usually acquired by people as a result of infection, that is, the causative organisms are usually passed from one person to another. But since the advent of microbiology in medicine, the trend has change, because the microbes can now be countered using different antibiotic means.
Answer:
I am not too sure but maybe A?
Explanation:
Because plants are part of the biosphere and land is part of the geosphere
I am sorry if it is wrong
Answer:
B. Depleting wooded areas means fewer habitats for forest organisms
Answer:
a. Hormones can persist much longer than electrical signals
Explanation:
Althought hormonal response is slower than electrical signals it affects a large number of organs and sistems. Example: electrical signals are for the openening or closing channels of sodium/potassium wich causes ionic differences on the cells producing quick reponses like movement or blood pressure changes. Meanwhile hormonal response control larger sistems and more complex process like pregnancy
