It takes of heroin to cause a lethal overdose. a. less than a milligram b. less than half a gram c. less than a gram d. more than a gram

C. less than a gram

Explanation:

Overdoses with drugs vary from person to person while some person can overdose from what other person can only be feeling the effects of the drugs, this can be related to the effect that drugs have on the body, the capacity of the body to eliminate the drugs and other capacities that the body might have, but heroin is a very dangerous drug, and a dose smaller than a gram could provoque a lethal overdose on anyone.

each of the 46 original chromosomes splits into two daughter chromosomes, so there are two sets of 46 daughter chromosomes that end up in each cell. human cells have 46 chromosomes. each chromosome consists of a pair of identical chromatids attached together by a structure called a centromere.

i'd say that the moon rock is about 2.2 billion years old.