Biology, 23.11.2019 10:31 InnocentSoul

All of the following have an internal skeleton except
a. sand dollars.
b. sand fleas.
c. sea stars.
d. sea lilies.

Answers: 1

Show answers

Other questions on the subject: Biology

Biology, 21.06.2019 20:40, jaycie16

Match the following terms describing electrical events with the correct phases of the cardiac cycle. the ventricular muscle cells depolarize at the start of this phase. during this phase, na+ entry through the funny channels causes the pacemaker potential of sa nodal cells to gradually become less negative until it reaches threshold. the ventricular muscle cells repolarize right before this phase. the cytosolic concentration of calcium in the contractile cells of the ventricle is highest during this phase. a. isovolumetric relaxation b. ventricular ejection c. isovolumetric contraction d. ventricular filling

Answers: 3

continue

Biology, 21.06.2019 21:00, hayleighhurt

What is the answer for the complicated molecules that make up living things usually contain carbon. why is carbon so important in these molecules?

Answers: 3

continue

Biology, 22.06.2019 04:30, nefertitihorne12

Why is it incorrect to say that mitochondria function only as energy factories with cell

Answers: 1

continue

Biology, 22.06.2019 08:30, janely6017

The image below shows a weather service map. which details best describe this map? check all that apply