what are choanocycles or collar cells?
Give True or False.
a) Gymnosperms differ from Angiosperms in having covered seed.
b) Non-flowering plants are called Crytogamae.
c) Bryophutes have conducting tissue.
d) Funaria is a moss.
e) Compound leaves are found in many ferns.
f) Seeds contain embryo.
difference between open type and closed type circulatory system in tabular form?
which is the most poisonous snake in the world?
In cyclostomes ....are sexes separate and is development direct or indirect?
what is hypostome ( present in phylum cnidaria or phylum coelentereta)?
what is thallus?
What is the difference between pectoral and pelvic fins ? please provide a diagram as well.....
In the flow chart for Phylum Chordata
Urochordata and Cephalochordata are known as Protochordates not Prochordates !!!!!!!!!!!!!
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?
What is the difference between phyla and phylum?
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
what are ostia?
An example of Pseudocoelom.
what are the exceptions in biology?
all vertebrates are chordates but all chordates are not vertebrates. justify.
At one time sponges were classified as plants. Why?
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