Ruminants belong to order
Proboscida
Artiodactyla
Marsupials
Edentata
B.
Artiodactyla
Ruminants have the habit of chewing the cud. Stomach of ruminants have four parts, ie, rumen, reticulum, omassum, abomassum. They belong to Order- Artiodactyla of Class- Mammalia, eg, cow, sheep, goat.
Elephants belong to Order- Proboscidea of Class- Mammalia.
Marsupials are the members of subclass- Metatheria, in which a pouch marsupium is present for keeping and nourishing the young ones, eg, kangaroo.
In parasympathetic nervous system, which of the following is released?
Epinephrine
Norepinephrine
Serotonin
Acetylcholine
The velocity of conduction of nerve impulse in frog is
300 m/s
same as of electricity
faster than sound
30 m/s
Entamoeba histolytica differs from Amoeba in absence of
pseudopodia
contractile vacuole
nucleus
ectoplasm
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
Which of the following is important for muscle contraction and nerve impulse transmission?
Ca2+ ions
Ca2+ and Mg2+ ions
Mg2+ ions
Fe2+ ions
Which compound has a very important role in prebiotic evolution?
Sulphur dioxide
Nitric oxide
Methane
Sulphur trioxide