Which of the following happens during transcription? A. the DNA double helix "unzips" or "unwinds"

B. DNA is split in half and moves into the cytoplasm

C. a sequence of tRNA is made

D. a new double strand of DNA is created

How does a gymnosperm prevent itself from pollinating the same tree

Diabetes is often suspected when glucose shows up in urine tests. use the model to explain how glucose could be present in urine. why do you think this symptom is especially concerning for young people?

Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.