Can you help me please i will give you a branlist and it’s science

What protects the lining of the stomach from acidic gastric juices?

Photosynthesis converts light energy to chemical energy. which molecules are the end product of this transformation of energy in this reaction?

Which of the following occurs most often in a population when genetic variation and overproduction are present? some organisms have a lower reproductive success than others. some organisms have a higher reproductive success than others. some organisms have no reproductive success. some organisms do not have genetic variation.