All of the following are biotic factors of a pond except
A. sunlight
B. fish
C. algae
D. ducks

Four types of motile cells in human body?

Which statement correctly identifies the scientific question and describes why the question is scientific? question 1 refers to the supernatural.question 2 reflects a moral or social value.question 3 refers to something that can be measured.question 4 reflects a question that can’t be observed.

Explain how sequences of amino acids in proteins can be used to reveal relationships among organisms.