In animals like Annelids, Molluscs, organs have associated to form functional systems, each system concerned with a specific physiological function. This pattern is called ________ system level of organization.
organ
open
closed
coelom
A.
organ
Animals in which the cells are arranged in two embryonic layers are called ________.
Diploblastic
Extoderm
Tripoblastic
Endoderm
A healthy adult man has, on an average, ............ (in millions) of RBC mm-3 of blood.
5 - 5.5
4 - 4.5
3 - 3.5
6 - 6.5
A multicellular organism grows by ..............
cell addition
cell explosion
cell implosion
cell division
Sycon (Scypha), Spongilla (Fresh water sponge) and Euspongia (Bath sponge) are examples of which Phylum?
Coelenterata
Platyhelminthes
Ctenophora
Porifera
................ being a higher category, is the assemblage of families which exhibit a few similar characters.
Order
Species
Genus
Class
............. influences are the rate of weathering and humus in soil formation.
Flora & Fauna
Time
Parent rock
Climate