A) tend to be active and move forward.
B) tend to exhibit cephalization.
C) have right and left sides when cut longitudinally.
D) All of the choices are correct.
F) A) and B)
Correct Answer
verified
Correct Answer
verified
A) presence or absence of segmentation.
B) mode of reproduction.
C) type of body symmetry.
D) number of germ layers.
E) molecular data.
G) All of the above
Correct Answer
verified
Correct Answer
verified
A) proglottids.
B) cercariae.
C) sporocysts.
D) scolexes.
E) glycocalyxes.
G) C) and D)
Correct Answer
verified
Correct Answer
verified
A) Mollusca
B) Arthropoda
C) Chordata
D) Echinodermata
E) Annelida
G) A) and D)
Correct Answer
verified
Correct Answer
verified
A) lack the setae that earthworms have.
B) have paddle-like parapodia that earthworms do not have.
C) have segments,whereas marine annelids do not.
D) lack a larval form,whereas earthworms have a larvae form.
E) marine annelids have a well-developed coelom,whereas earthworms do not.
G) A) and D)
Correct Answer
verified
Correct Answer
verified
A) There are three layers of tissues in the body.
B) Roundworms have a tube-within-a-tube body plan.
C) There is an internal body cavity called a pseudocoelom.
D) Roundworms have a smooth unsegmented outside body wall.
E) Roundworms are all parasitic.
G) B) and E)
Correct Answer
verified
Correct Answer
verified
A) They are free-swimming invertebrates.
B) They contain a capsule called a nematocyst.
C) They produce movement by the beating of cilia.
D) Much of the body is composed of a jellylike substance called mesoglea.
E) These species can be found in the marine environment.
G) C) and D)
Correct Answer
verified
Correct Answer
verified
A) have a trochophore larvae.
B) have a body cavity that is completely lined with mesoderm.
C) have the anus arise at or near the blastopore.
D) periodically shed their outer covering.
E) No answer choice is correct.
G) A) and D)
Correct Answer
verified
Correct Answer
verified
B) False
Correct Answer
verified
Correct Answer
verified
A) a water vascular system that regulates water pressure.
B) cilia transporting hemolymph from chamber to chamber.
C) sticky threads leading from the mouth and primitive brain.
D) actin and myosin fibers that slide and give muscle actions to the five arms or "rays."
F) B) and C)
Correct Answer
verified
Correct Answer
verified
B) False
Correct Answer
verified
Correct Answer
verified
A) In radial symmetry,two identical halves are obtained regardless of how the animal is sliced longitudinally.
B) The evolution of bilateral symmetry is accompanied by cephalization.
C) Asymmetrical animals have no body shape.
D) Bilaterally symmetric animals are usually sessile.
E) Radial symmetry is useful because the animals can reach out in all directions.
G) A) and D)
Correct Answer
verified
Correct Answer
verified
Correct Answer
verified
Both of these groups have true tissues,h...View Answer
Correct Answer
verified
View Answer
Showing 41 - 53 of 53
Related Exams