GENERAL HISTOLOGY

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OESOPHAGUS STOMACH

ECHINODERMS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The crustaceans in order Decapoda are important to the fishing industry because they may replace shrimp, lobsters and crabs as a food source.
A
True
B
False
C
Either A or B
D
None of the above
Explanation: 

Detailed explanation-1: -What characteristics do crustaceans in order Decapoda have in common? Ten functional legs. They have claws and an extended carapace that encloses the gills.

Detailed explanation-2: -The largest class in the phylum Cnidaria is Anthozoa a class of marine invertebrate animals containing 6, 000 species including the corals, anemones, sea fans, and sea pens.

Detailed explanation-3: -Sponges have a unique feeding system among animals. Instead of a mouths they have tiny pores (ostia) in their outer walls through which water is drawn. Cells in the sponge walls filter food from the water as the water is pumped through the body and the osculum ("little mouth").

Detailed explanation-4: -Nemertea, or ribbon worms, are distinguished by their proboscis, used for capturing prey and enclosed in a cavity called a rhynchocoel.

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