When one element is involved in opening and closing of stomata, the other helps to maintain the ribosome structure. They are
Options
(a) potassium and calcium (b) phosphorus and sulphur (c) potassium and […]
The ‘U’ shaped bone present at the base of the buccal cavity is
Options
(a) zygomatic (b) ethmoid (c) Malleus (d) hyoid
Correct Answer:
hyoid
Explanation:
The hyoid bone is situated in the […]
Choose the wrong statement about excretion
Options
(a) In ureotelic organisms, ammonia is not a product of metabolism (b) In mammals, some amount of urea may be retained in the kidney matrix of ureotelics […]
The electromagnetic waves detected using a thermopile and used in physical therapy are
Options
(a) gamma radiations (b) x-rays (c) ultraviolet radiations (d) infrared radiations
Correct Answer:
infrared radiations
Explanation:
The electromagnetic waves […]
when a magnetic field is applied on a stationary electron, then it
Options
(a) remains stationary (b) spins about its own axis (c) moves in the direction of the field (d) moves perpendicular […]
A toroid having 200 turns caries a current of 1 A. The average radius of the toroid is 10 cm. The magnetic field at any point in the open space inside the toroid is
Astigmatism is corrected by using
Options
(a) cylindrical lens (b) plano-convex lens (c) plano-concave lens (d) convex lens
Correct Answer:
cylindrical lens
Explanation:
In this defect, eye cannot perpendicular directions clearly that is horizontal […]
Two lenses of power 15 D and -3 D are placed in contact. The focal length of the combinations is
Options
(a) 10 cm (b) 15 cm (c) 12 cm (d) 8.33 cm
Choose the wrong statement.
Options
(a) In ureotelic organisms, ammonia is not a product of metabolism (b) In mammals, some amount of urea may be retained in the kidney matrix of ureotelics to […]
An electric dipole of dipole moment p is placed in a uniform external electric field E. Then the,
Options
(a) torque experienced by the dipole is E x p (b) torque is zero, […]
2017 Copyright Doctor Dreams Training Academy