The answer is (1) !!
it is one direction, from sun to produces to consumer !!
Answer:
HIV (human immunodeficiency virus) is a virus that attacks a type of white blood cell called a T-helper cell (also called a CD4 cell). People who have been infected with HIV develop AIDS. People with AIDS often develop diseases caused by organisms that usually do not harm people who are not infected with HIV. Explain why the organisms are more harmful to people with HIV than to people without HIV
There are two types of population growth: exponetial growth and logistic growth
The heart is a muscle, therefore, if the cardiac muscles stopped contracting, the result would be the ceasing of heart function. That would lead to death, as blood wouldn't be pumped throughout the body. Homeostasis would therefore be interrupted.
