Connecting link between annelids and molluscs is
Neopilina
Peripatus
Periplaneta
Limulus
A.
Neopilina
Neopilina (mollusc) is considered as a connecting link between Annelida and Mollusca.
Which one is component of Ornithine cycle?
Ornithine, citrulline and alanine
Ornithine, citrulline and arginine
Amino acids are not used
Ornithine, citrulline and fumaric acid
The velocity of conduction of nerve impulse in frog is
300 m/s
same as of electricity
faster than sound
30 m/s
Which of the following is important for muscle contraction and nerve impulse transmission?
Ca2+ ions
Ca2+ and Mg2+ ions
Mg2+ ions
Fe2+ ions
In parasympathetic nervous system, which of the following is released?
Epinephrine
Norepinephrine
Serotonin
Acetylcholine
Entamoeba histolytica differs from Amoeba in absence of
pseudopodia
contractile vacuole
nucleus
ectoplasm
Which compound has a very important role in prebiotic evolution?
Sulphur dioxide
Nitric oxide
Methane
Sulphur trioxide