[" Hill reaction occurs in "],[[" A High altitude plants "],[" B Total darkness "],[" (C) Presence of ferricyanide "],[" D) Absence of water "]]

Ascaris is characterized by (a) Absence of true coelom but presence of metamerism (b) Presence of neither true coelom nor metamerism (c) Presence of true coelom but absence of metamerism. (d) Presence of true coelom and metamerism.

In contrast to Annelids, the Platyhelminthes show (a) Radial symmetry (b) Presence of pesudocoel (c) Bilateral symmetry (d) Absence of body cavity

Can photosynthesis occur in a land plant if it is totally submerged in water?

Xylem channels of the rootlets maintain a low water potential due to (a) Maintenance of high salt content (b) Presence of negative pressure or water tension (c) Both a and b (d) Occurrence of positive pressure

Xylem channels of the rootlets maintain a low water potential due to (a) Maintenance of high salt content (b) Presence of negative pressure or water tension (c) Both a and b (d) Occurrence of positive pressure

Which two of the following changes (a-d) usually tend to occur in the plain dwellers when they move to high altitude (3,500 m or more ) (a) Increase in red blood cell size (b) Increase in red blood cell production (c) Increased breathing rate (d) Increase in thrombocyte count Changes occuring are