How long does it take a child to go to a bathroom? my brothers been in the bathroom for 20 minutes

If bacteria are much too small to see, what is one reason why can we see colonies in the petri dishes that have plenty of food to eat after only a few days?

As the pea seeds respire, the level of coloured liquid in the left hand part of the capillary tube rises. by referring to what is happening in the apparatus, explain why the level of liquid changes

To determine if a particular plant is homozygous or heterozygous, you would have to test cross with a