What are enzymes and how are they important to living things ?

Look at the punnett square for an x-linked recessive disease. is it possible for a female offspring to have the disease?

During the process of meiosis, special cells called gametes are formed. gametes only have half the number of chromosomes that the other cells in the body have. what form of reproduction do organisms that produce gametes use?

The negative change found inside the plasma membrane is created by potassium ions sodium ions hydrogen ions chlorine ions