The number of chromosomes in a cell
a) is 50
b) varies from spices to spices
c) is haploid
d) is either 25 or 50

What would be the result if crossing over did not happen during meiosis in humans? a. there would be less genetic variation in humans. b. parents would be more likely to look like their children. c. the human population could not reproduce. d. children would have more chromosomes.

Which of these is true for bacteria because they are prokaryotic cells? a. they can engulf body cells in order to make memory cells. b. they must invade viruses in order to reproduce. c. they are much larger than eukaryotic body cells. d. they can reproduce on their own outside of other cells.

The same agricultural practices are used in every country of the world. select the best answer from the choices provided t f