1.]what is halophytic nutrition??

2.]what are sessile animals??

3.]what is spicules??

4.] what is an hermaphrodite organism??

difference between open type and closed type circulatory system in tabular form?

what are choanocycles or collar cells?

which is the most poisonous snake in the world?

what is thallus?

In the flow chart for Phylum Chordata

Urochordata and Cephalochordata are known as Protochordates not  Prochordates !!!!!!!!!!!!!

what is metagenesis in CNIDARIANS?

Is there any connecting link between

1.Amphibians and Reptiles

2.Aves and Mammals

what does ossified endoskeleton mean?
 

 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.

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.