How do fraternal twins form?

A - two eggs are fertilized by one sperm

B - two sperm fertilize an egg

C - A fertilized egg splits in two

D - two eggs are fertilized by two sperm

In the United States what material is least likely to be recycled

How many genotypes are in the ABO+ / - system?

Diffusion can involve water, and what else?

Benthos are organisms that live

Example of a Water Conservation Technique That Also Reduces Water Pollution

Which phylum includes animals that lack tissues? Cnidaria Porifera Platyhelminthes Arthropoda Chordata

True or False: SIV has a high mortality rate in apes and monkeys who are infected with the virus.

In the absence of lactose, the cell transcription of DNA is blocked when ...

What would be the likely outcome if a microbe could prevent the activation of c3 in the complement cascade?

Thirteen-year-old grace's blood tests indicate that her levels of testosterone are about twice as high as they were a few years ago, and that her estradiol levels are about eight times higher than earlier. grace is most likely experiencing: