A selectively permeable membrane prohibits the movement of some substances across the membrane. a. True
b. False

Which best explains why there are 64 possible codons in the genetic code and only 20 amino acids that make protiens of living organisms on earth

Apair of fruit flies reproduces and has 1,000 offspring. all 1,000 of the offspring have the alleles gg. what is the most likely combination of alleles for each parent

The transport tubes from food came down the plant are called?