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Q.29 The structural basis in sponges is provided by which of the following? (1) Pinacocytes (2) Choanocytes (3) Porocytes (4) Amoebocytes Sponge Body Structure Overview Sponges (Phylum Porifera) lack true […]

Q.28 The six-kingdom classification was proposed by whom? (1) R.H. Whittaker (2) Carl Woese (3) Carolus Linnaeus (4) Herbert Land What is Six-Kingdom Classification? The six-kingdom system expands traditional taxonomy […]

Q.27 Neoteny is exhibited by :- (1) Axolotl larva (2) Zoea larva (3) Bipinnaria larva (4) Planula larva What is Neoteny? Neoteny is a form of paedomorphosis where juvenile traits […]

Q.26 Embryonic cleavage in mammals is (1) Rotational cleavage (2) Radial cleavage (3) Bilateral cleavage (4) Discoidal cleavage What is Embryonic Cleavage? Embryonic cleavage refers to the rapid series of […]

Q.25 Hormone responsible for metamorphosis in frog is :- (1) Ecdysone (2) Juvenile hormone (3) Growth hormone (4) Thyroid hormone Frog Metamorphosis Hormone: Thyroid Hormone Explained Thyroid hormone drives metamorphosis […]

Q.24 Reabsorption of water via the distal convoluted tubule is by which of the following? (1) Rennin and angiotensin (2) Aldosterone (3) Vasopressin (4) Glucocorticoid Water Reabsorption in DCT: Vasopressin […]

Q.23 In the stomach, hydrochloric acid (HCl) is secreted by (1) Chief cells (2) Parietal cells (3) Enterochromaffin cells (4) Mucous cells HCl Secreted by Parietal Cells Hydrochloric acid (HCl) […]

Q.22 Which one of the following is known as pacemaker of the heart? (1) Sino-Atrial Node (2) Atrio-Ventricular Node (3) Purkinje Fibres (4) Bundle of His Pacemaker of the Heart: […]

Q.21 Melatonin is derived from which of the following? (1) Epinephrine (2) Nor-epinephrine (3) Serotonin (4) Histamine Melatonin Derived from Serotonin Melatonin, the sleep-regulating hormone, is biosynthesized directly from serotonin […]

Q.20 In the formation of agarose gel, which one of the following bonds is involved? (1) Van der Waals interaction (2) Intra-chain hydrogen bonding (3) Inter and Intra-chain hydrogen bonding […]