The excretory material of bony fish is
urea
protein
ammonia
amino acid
A.
urea
The excretory and osmoregulatory organs of fishes are the gills and kidney. Excretion in bony fishes is ureotelic (ie, they excrete urea but some fresh water bony fishes are ammonotelic (ie, excrete ammonia).
Contractile vacuole in protozoan Amoeba is meant for
respiration
excretion
locomotion
osmoregulation
Which of the following is important for muscle contraction and nerve impulse transmission?
Ca2+ ions
Mg2+ ions
Both (a) and (b)
Fe2+ ions
Which one is component of Ornithine cycle?
Ornithine, citrulline and alanine
Ornithine, citrulline and arginine
Amino acid are not used
Ornithine, citrulline and fumaric acid
The leucocytes contain which of the following in large quantity?
Basophils
Neutrophils
Eosinophils
Monocytes
During inspiration, the diaphragm
expands
shows no change
contracts and flattens
relaxes to become dome- shaped
The function of pineal body is to
lighten the skin colours
control sexual behaviour
regulates the period of puberty
All of the above