Phylum-Arthropoda- Paneus And Lifecycle Of Silkwor
Phylum-Arthropoda- Paneus and lifecycle of silkwor
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Phylum-Arthropoda- Paneus and lifecycle of silkworm Exams Questions and Answers
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Phylum-Arthropoda- Paneus and lifecycle of silkwor
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Phylum-Arthropoda- Paneus And Lifecycle Of Silkwor
Phylum-Arthropoda- Paneus and lifecycle of silkworm
Habit habitat - Answer- Everywhere but this lives in the sea
aka - Answer- giant tiger prawn
Symmetry and germlayers - Answer- Bilateral, Triploblastic
Coelom - Answer- true body cavity filled with visceral organs
Body form - Answer...
Phylum-Arthropoda- Paneus and
lifecycle of silkworm
Habit habitat - Answer- Everywhere but this lives in the sea
aka - Answer- giant tiger prawn
Symmetry and germlayers - Answer- Bilateral, Triploblastic
Coelom - Answer- true body cavity filled with visceral organs
Body form - Answer- Hard exoskeleton made of chitin(reason for its successful
existance), This prevents loss of water through evaporation.
Body divided into Head thorax and abdomen which are further divided into segments
which make it a segmented body.
Two pairs of antennae and one pair of stalked compound eyes.
Head - Answer- A carapace (hard exoskeleton) encloses the cephalothorax. Their
heads have a rostrum (an extension of the carapace in front of the eyes) and six to
eight dorsal teeth, as well as two to four sigmoidally-shaped ventral teeth. A posterior
ridge called the adrostral carina extends from the rostrum to the edge of the
epigastric spine, which reaches to the posterior end of the carapace.
Appendages - Answer- Have jointed appendages(five pairs of swimming legs
(pleopods) and five pairs of walking legs (pereopods), as well as numerous head
appendages.)Their first three pairs of pereopods have claws and they are
distinguished from other shrimp species by the lack of an exopod (an external
branch) on their fifth pleopodia. The telson at the posterior end of the prawn is
unarmed, with no spines.
Sexes - Answer- are sexually dimorphic, with females are larger than males.
Reproduction - Answer- Female stores sperm in thelycum, Male releases
spermatophore aka spermsac in the female while copulation. Then female releases
both eggs and sper in water where external fertilization takes place.
development - Answer- indirect. three larval stages.
Naupilii hatch twelve to fifteen hours after spawning is completed and look like tiny
spiders and survive on yolk not feeding. followed by 6 moults
protozoea, are identified by increased body size and length, the appearance of
feathery appendages and, though still planktonic, beginning to feed. Followed by 3
moults.
Mysis larval stage begins to have characteristics of adult prawns including
segmented bodies, eye stalks, and tails. molt three more times, becoming
postlarvae. At this point in the life cycle, they change from planktonic to benthic
feeding. Follow through juvenile stage by more molts.
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