What do bacteria and humans have in common that makes it possible for a human gene to be expressed in bacteria?

Which is not an example of a culture hearth? A. Mayan influence on Central America B. Olmec influence on Mexico C. China's influence on East Asia D. United States' influence on Canada

Some insecticides, such as chlorpyrifos, work by inhibiting the enzyme acetylcholinesterase (AChE), which normally breaks down the neurotransmitter acetylcholine. Where does this insecticide most likely bind to inhibit the enzyme's activity?

Situations in which one allele for a gene is not completely dominant over another allele for that gene are called ...

1. Can two individuals from different subspecies interbreed? Explain your answer 2. What is a major caused of extinction? 3. What mechanism of reproductive isolation caused the original fish population to diverge?

how many atoms in the compound A1 (NH3) 2

Desert animals, such as the kangaroo rat, need to conserve water. These animals have larger kidneys than do animals that live in moist environments and thus need not conserve water.

What is the function of a nucleus in a cell the nucleus A. controlls the cells activity B. the nucleus identifies the cell as belonging to a plant C. the nucleus determines what substances enter and leave the cell D.

Which best describes emerging scientific ideas? a. never been tested b. unpublished c. supported by most, but not all, scientists d. not studied by many scientists

A sonic boom is produced by a jet. What can you determine about the jet's motion? a) It is near a mountain where echos can be produced b) Its engines produced backfire c) It is increasing in altitude d) It is traveling faster than the speed of

What happens when someone dies?