D. radial symmetry evolved at least twice in unrelated invertebrates groups
Answer:
Smooth Muscle Definition Smooth muscle is a type of muscle tissue which is used by various systems to apply pressure to vessels and organs. Smooth muscle is composed of sheets or strands of smooth muscle cells. These cells have fibers of actin and myosin which run through the cell and are supported by a framework of other proteins.
Explanation:
Answer:
DOMAIN is the broadest level of classification and ______ is the most specific.
Explanation:
I DONT KNOW THE SECOND ONE SORRY
Answer:
It would be mutualism because they both benefit from the situation
Explanation:
Not to be too picky, but the question ought to say a positively charge ion rather than atom.
I will assume that is what you mean. An ion, using ordinary means, will be positive if it loses electrons (which are negative).
An ion can never gain protons. Left alone, the nucleus will remain unchanged for the rest of eternity. D is wrong.
C is wrong. If electrons are gained, the ion will go negative.
B is wrong for the same reason D is. An ion can't gain protons and it can't lose them.
A is the answer.
