If the unfertilized egg of a bird contains 18 chromosomes, how many chromosomes would be found in the same bird's muscle cell?

Ineed to know why d is the correct answer asap

The transport tubes for food coming down the plants are called?

Can bacteria reproduce in a way such that when you start out with two bacteria, you get five bacteria? why or why not? * a. yes, because bacteria reproduce sexually, and can produce any number of offspring, just as humans do. b. no, because bacteria grow at an exponential rate. c. no, because when bacteria reproduce, they split into two parts, and two bacteria splitting would result in four bacteria.