PLZZ HELP Which of these are characteristics of bryophytes? (Select all that apply.)
can survive without water for long periods
lack leaves and stems
grow to be relatively tall
contain chlorophyll

How can antibodies "remember" a particular bacterial invader or "antigen" on that invader?

What causes eclipses? check all that apply. earth's rotation on its axis moon's shadow covering the sun earth's shadow covering the moon earth's orbit and moon's orbit occasionally aligning the moon and sun's gravity pulling in the same direction

If a human has 23 pairs of chromosomes in every muscle cell of its body how many chromosomes will be in a human egg or sperm