Biology Questions and Answers
- Do echinoderms present
internal or external
fecundation? Is there sex
division among individuals?
The fecundation in external, gametes arechinoderms ise liberated in water (^)
where fecundation occurs.
The majority of echinoderms are
dioecious with individuals. male and female
- Is there a larval stage in
echinoderms?
In echinoderms embryonic dis indirect, with ciliated larvae.evelopment
- What are the classes into
which the phylum
Echinodermata is divided?
The five echinoderm classesasteroids (starfishes), ophiuroids, are: (^)
crinoids, holothuroiand echinoids (sea urchins ands (sea cucumd sandbers)
dollars).
- Echinoderm identity card.
How are echinoderms
characterized according to
examples of representing
beings, basic morphology,
type of symmetry, germ layers
and coelom, digestive system,
respiratory system, circulatory
system, excretory system,
nervous system and types of
reproduction?
Examples of representing beings: sea
cucummorphology: ber, sea urchin, starfishes. Basiccalcareous endoskeleton
with spines, ambulacral system. Type of
symmetry: slayers and coelom: econdary triploblastics,radial. Germ
coelomates.complete, deuterostomes. Res Digestive system:piratory (^)
system: nonexistent. Circulatory
system: nnonexistent.onexistent. Nervous system: Excretory system: simple,
nerve network without ganglia or
cephalization. Tsexual, with larval stage.ypes of reproduction:
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