quinn shirley

a student estimating the cell size of onion cells observed millimeter marks on the microscope field of view. She counted 20 cells along the diameter of the field of view. Calculate the size of one cell in micrometers

state three roles of active transport in living organisms

in an experiment, serum samples from people with blood groups a and b were mixed with whole blood from another person x. In both cases, agglutination did not take place. explain giving reasons for the blood group of person x.

Explain why a person can catch a cold several times in a year but only catches measles once in his or her lifetime

state two importance of the process of transpiration

explain how sunken stomata reduce the rate of transpiration

what are the characteristics features of respiratory surfaces

name the type of circulatory system found in a class insect

people can die when they inhale gases from burning charcoal in poorly ventilated rooms. what compound is formed in the human body that leads to such deaths

Distinguish between blood, plasma, serum, tissue fluid and lymph