How are organisms grouped in an ecosystem?
a. by their movement
b. by how they get their energy
c. by how they migrate
d. by how they produce

"do a testcross with a homozygous recessive plant."

ionic bonds are two oppositely charged ions that attract. a sodium ion has a 1 positive charge; a chloride ion has a 1 negative charge. sodium and chloride have oppostive charged ions that attract which forms an ionic bond. a chemical bond formed when two atoms share electrons is called