Multiple Choice
The circulatory system in the earthworm
A) is absent.
B) is an open type.
C) uses the dorsal vessel as the main pumping organ.
D) has no pumping structure and depends on the action of body muscles to move the blooD.
Correct Answer:
Verified
Correct Answer:
Verified
Q10: Leeches typically lack both setae and septa.
Q11: The following characteristics are typical of annelids:<br>A)segmentation,open
Q12: The Errantia<br>A)belong to the smallest and most
Q13: The most diverse class of annelids is
Q14: The Errantia have separate sexes,but the earthworms
Q16: Reproduction in the earthworm involves<br>A)asexual budding.<br>B)self-fertilization.<br>C)cross-fertilization between
Q17: Echiurans<br>A)live in fresh water.<br>B)have a proboscis used
Q18: The cocoon in the earthworm is produced
Q19: Annelids may be characterized as protostomes,with spiral
Q20: Errantia differ from other annelids because errantia