In case of poriferans, the spongocoel is lined with flagellated cells called as
Options
(a) Mesenchymal cells (b) Ostia (c) Oscula (d) Choanocytes
Correct Answer:
Choanocytes
Explanation:
Choanocytes (collar cells) form the lining […]
In Bougainvillea thorns are the modifications of
Options
(a) Leaf (b) Stipules (c) Adventitious root (d) Stem
Correct Answer:
Stem
Explanation:
Thorns are hard, pointed straight structures for protection. These are modified stem
Hypersecretion of Growth Hormone in adults does not cause further increase in height, weight.
Options
(a) Muscle fibres do not grow in size after birth (b) Growth Hormone becomes inactive in adults (c) […]
GnRH, a hypothalamic hormone, needed in reproduction acts on
Options
(a) Posterior pituitary gland and stimulates secretion of LH and relaxin (b) Anterior pituitary gland and stimulates secretion of LH and oxytocin (c) […]
Fruit and leaf drop at early stages can be prevented by the application of
Options
(a) Gibberellic acid (b) Cytokinins (c) Ethylene (d) Auxins
Correct Answer:
Auxins
Explanation:
Auxins prevent premature leaf and […]
DNA replication in bacteria occurs
Options
(a) Just before transcription (b) During S phase (c) Within nuleolus (d) Prior to fission
Correct Answer:
Prior to fission
Explanation:
DNA replication in bacteria occurs prior […]
Coconut fruit is a
Options
(a) Capsule (b) Drupe (c) Berry (d) Nut
Correct Answer:
Drupe
Explanation:
Coconut fruit is a drupe. A drupe develops from a monocarpellary superior ovary and is one […]
Anaphase Promoting Complex(APC) is a protein degradation machinery necessary for proper mitosis of animal cells. If APC us defective in a human cell, which of the following is expected to occur?
Options
(a) […]
An important characteristic that Hemichordates share with Chordates is
Options
(a) Pharynx without gill slits (b) Absence of notochord (c) Ventral tubular nerve cord (d) Pharynx with gill slits
Correct Answer:
Pharynx with […]
An example of colonial alga is
Options
(a) Spirogyra (b) Chlorella (c) Volvox (d) Ulothrix
Correct Answer:
Volvox
Explanation:
Volvox is motile colonial freshwater alga with a definite number of vegetative cells.
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