How many layers does the wall of the eyeball have?
(A) 1
(B) 2
(C) 3
(D) 4
The internal structures of the eye consist of three layers of tissue arranged concentrically: The sclera and cornea make up the exterior layers. The uvea is the vascular layer in the middle, subdivided into the iris, ciliary body, and choroid. The retina constitutes the innermost layer and is made up of nervous tissue.
Which of these joints is a hinge joint?
(A) Hip
(B) Elbow
(C) Shoulder
(D) Wriest
The hinge joints of the body include the elbow, knee, interphalangeal (IP) joints of the hand and foot and the tibiotalar joint of the ankle.
Which of the following tissues has the most regenerative power?
(A) Epithelial tissue
(B) Connective tissue
(C) Muscular tissue
(D) Neural tissue
Epithelial tissue and connective tissues are tissues that have the greatest capacity to regenerate.
Which of the following structures protects the eyes of a frog in water?
(A) Tympanum
(B) Eyelashes
(C) Eyelid
(D) Nictitating membrane
The eyes of frogs are protected by a nictitating membrane.
What is the approximate time difference between an actual sunset and a virtual sunset?
(A) 2 minutes
(B) 1 minute
(C) 4 minutes
(D) 3 minutes
As a result, the Sun appears to be raised above the horizon and we are able to see the Sun 2 minutes before the actual sunrise. Same phenomenon occurs during sunset, i.e., we can see the Sun 2 minutes after the actual sunset. Thus, the time difference between actual sunset and the apparent sunset is about 2 minutes.
Which physical quantity is obtained from the ratio of momentum and velocity of matter?
(A) Velocity
(B) mass
(C) Angular velocity
(D) Acceleration
The correct answer is Mass. Mass is a quantitative measure of inertia, a fundamental property of all matter. It is the resistance that a body of matter offers to a change in its speed or position upon the application of a force. Mass is represented by the ratio of momentum and velocity of the body.
What is the force due to which the body is pulled towards the center of the earth?
(A) mass
(B) impulsive force
(C) Gravity
(D) momentum
Everything is pulled towards center of the Earth because of the force of gravity. Gravity is an invisible pull which attracts the objects towards the center of a planet.
Light year is a unit of which of the following physical sign?
(A) Short time interval
(B) mass
(C) Work
(D) distance
Light-year is the unit of length to measure large distances (astronomical distances).
The total distance travelled by light in 1 year is called 1 light year.
1 light-year = 9.46 × 1012 km.
Explanation for the incorrect options
The second (sec) is the unit of time.
A kg is the unit of mass.
Therefore, the Light year is the unit of distance. So, option (D) is correct.
The difference between the isotopes of an element is due to the presence of different numbers of
(A) Proton
(B) Newton
(C) Electron
(D) Photon
Isotopes are atoms of the same element that have different numbers of neutrons but the same number of protons and electrons. The difference in the number of neutrons between the various isotopes of an element means that the various isotopes have different masses.
When passing through a prism under deflection, which color has the maximum deviation of light?
(A) Red color
(B) Green color
(C) Blue color
(D) violet
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