occurs in the human eye?
(A) concave lens
(B) convex mirror
(C) convex lens
(D) concave mirror
convex lenses are used in the human eye to help focus light onto the retina, allowing us to see clearly. The natural lens in the human eye is flexible and can change its shape, allowing it to adjust the focal length and focus on objects at different distances. This process is called accommodation and is essential for clear vision.
What is the end product of anaerobic respiration?
(A) fumaric
(B) pyruvic acid
(C) lactic acid
(D) Water
lactic acid is one of the end products of anaerobic respiration in humans and some other organisms. During anaerobic respiration, which occurs in the absence of oxygen, glucose is partially broken down to generate energy. In the absence of oxygen, cells can convert pyruvate, a product of glycolysis, into lactic acid. This process, called lactic acid fermentation, helps generate energy in the absence of oxygen but also leads to the accumulation of lactic acid, causing muscle fatigue and soreness.
Who used the word histology for the first time?
(A) Memon
(B) schleiden
(C) robert hook
(D) Mayor
The junction between the axon of one neuron and the dendrite of the next is called
(A) A joint
(B) A synapse
(C) Constant bridge
(D) Junction point
The junction between the axon of one neuron and the dendrite (or cell body) of the next neuron is called a synapse. At the synapse, electrical or chemical signals are transmitted from one neuron to another or to an effector cell, such as a muscle cell or gland cell. Synapses play a crucial role in the transmission of nerve impulses within the nervous system.
Which of the following substances is insoluble in water?
(A) Salt
(B) Sugar
(C) Chalk powder
(D) Milk
The two planets which have no satellites are:
(A) Mercury and Mars
(B) Venus and Mars
(C) Earth and Uranus
(D) Mercury and Venus
Mercury and Venus are the two planets in our solar system that do not have any natural satellites (moons).
Why do cat's eyes glow at night?
(A) because of the special lens
(B) no clear cause known
(C) due to gene effect
(D) due to tapetum lucidum
What is the image formed by a plane mirror?
(A) real
(B) Dreamy
(C) Reverse
(D) None of these
The image formed by a plane mirror (also known as a flat mirror) is called a "virtual image." A virtual image is an image that is not real but appears as if it were. It is formed behind the mirror, and it appears to be the same size as the object being reflected. This image is upright (erect) and reversed from left to right, but it is not a tangible object; it exists as a result of the way light rays reflect off the mirror's surface.
Is a mirror always an erect image of a real object?
(A) flat, convex, concave
(B) flat, concave
(C) Convex Concave
(D) flat, convex
Flat Mirror (or Plane Mirror): Reflects light without distorting the image. The image formed is erect (upright) and of the same size as the object, but reversed from left to right.
Convex Mirror: Also produces an erect image. The image formed is virtual (cannot be projected onto a screen), smaller than the actual object, and upright.
Both flat and convex mirrors can create upright (erect) images of real objects.
What type of light beam is obtained from torch?
(A) parallel beam
(B) convergent beam
(C) diverging beam
(D) all of the above
A torch emits a divergent light beam, where light rays spread out as they move away from the source. This spreading allows the flashlight to illuminate a wider area, making it useful for various tasks. Divergent beams are common in flashlights, ensuring efficient coverage and visibility in the dark.
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