An inactive(dead) version of the disease is given, so that the body can build antibodies but now suffer from the symptoms
Crossing over occurs at the four-strand stage when two homologous chromosomes, each consisting of a pair of sister chromatids, are paired. Each crossover involves just two of the four strands and generates two recombinant strands.
Hope this helps!
This is false the population density will decrease as the area decreases
Since the cell is in a shoebox, we can assume this cell is a plant cell. the balloon most likely represents the vacuole, which is the largest organelle in the plant cell. the marbles could represent ribosomes, but ribosomes aren’t the only round organelle so i’m not sure about that one.
