What is immigration?
O
A. When animals move into an ecosystem
O
B. When animals die in an ecosystem
O
C. When animals are born in an ecosystem
O
D. When animals leave an ecosystem
SUBMIT
I just need the answers not a whole paragraph please and thank you

Which of the following descriptions of proteins are true? i. proteins can have different sequences of amino acids. ii. proteins can have different shapes. iii. proteins can have different numbers of amino acids. a. only i and ii are true. b. only ii and iii are true. c. only i and iii are true. d. i and ii and iii are all true. e. none are true statements

What is the first step in a life cycle of a plant reproduce sexually

What is called the "building block" of life?