what are choanocycles or collar cells?
difference between open type and closed type circulatory system in tabular form?
which is the most poisonous snake in the world?
Why are all sponges regardless of size, limited to feeding on microscopic food particles?
what is hypostome ( present in phylum cnidaria or phylum coelentereta)?
what is thallus?
why is octopus kept in phylum mollusca???????
it dosent have any shell????????
In the flow chart for Phylum Chordata
Urochordata and Cephalochordata are known as Protochordates not Prochordates !!!!!!!!!!!!!
why are urochordates called tunicates?
what is metagenesis in CNIDARIANS?
what does ossified endoskeleton mean?
Is there any connecting link between
1.Amphibians and Reptiles
2.Aves and Mammals
What do direct and indirect development mean?
Give one scientific term for the following:
1. Blood filled cavity in arthropods.
2.A collection of nerve cell bodies.
what are book lungs and book gills?
circulatory system of cockroach differs from that of the earth worm in:
1) lacking capillary network
2) lacking large blood vessels
3) possessing valves in large blood vessels
4) having a higher speed of circulation
An example of Pseudocoelom.
what is number of sigma and pi bond in cacl2
all vertebrates are chordates but all chordates are not vertebrates. justify.
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