Answer:
<em>The correct characteristics are - tissue, coelom, segmentation, endoskeleton, and backbone from top to bottom boxes.
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Explanation:
Chromosomes. Hope this helps.
A biological community of interacting organisms and their physical environment.
Answer:
False
Explanation:
The papillary muscles of both right and left ventricles began to contract shortly before the other ventricular muscles (systole) so that they can take up the slack on the chordae tendineae as the full force of ventricular contractions sends blood against the atrioventricular (AV) valve flaps.
They prevent the backward flow of blood to atria from ventricles. So if they contract after the ventricle systole they would not be able to perform their job.
