The process of squeezing food through the digestive tube by contractions of the outer wall is:
a. digestion
b. enzyme action
c. peristalsis
d. hydrolysis

The concept of keystone species is controversial among ecologists because most organisms are highly interdependent. if each of the trophic levels is dependant on all others how can we say one is most important

Does anyone know what a poms statement is for biology? i don't know what it is and i have an assignment on it tomorrow, will award the best answer a brainliest!

Identify two examples of chemical reactions that you have encountered during the last week. identify an exothermic and endothermic reaction. explain.