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
The vacuole is lined by a membrane called
tonoplast
jacket
cell membrane
tonoplasm
A.
tonoplast
The vacuole is lined by a membrane called tonoplast.
Jacket layer is present around archegonia and antheredia in bryophytes.
Tonoplasm is the content or liquid present inside the vacuole enclosed by a tonoplast membrane.
Cell membrane is the semi- permeable membrane enclosing the protoplasmic material of a cell.