Why Have Some of the World's Most Impressive Rainforests Developed

question 302

Multiple Choice

Why have some of the world's most impressive rainforests developed in Southeast Asia?

• A) The soil is incredibly fertile.
• B) The economy has never involved agriculture, thus preventing the clearing of the rainforests.
• C) The decay of detritus allows for the release of minerals that are taken up directly by the trees.
• D) There is no accepted biological explanation for this phenomenon.

---

Definitions:

Helper T Cell

Secretes lymphokines, which stimulate all kinds of immune cells.

Passive Immunity

Protection against infection, acquired by transfer of antibodies to a susceptible individual.

Antivenom

A substance, typically serum or a purified antibody, used to treat venomous bites and stings by neutralizing the specific toxins involved.

Antibodies

Proteins produced by the immune system that recognize and bind to specific antigens, helping to protect the body from pathogens.