What type of fish is a filter feeder

How can you keep track of variables in a science experiment?

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 phase of the cell cycle ensures that identical copies of the dna are made for daughter cells?