Daily NEET MCQ- September 5, 2022 - NEET MCQ

Electromagnetic spectrum is made up of various electromagnetic radiation. They are radio waves, X-rays, gamma rays, UV rays, the visible region, IR waves, and microwaves. Visible rays are the only ones which a human eye can see. They range from 450 – 750 nm.

The relation between wavelength(λ) and frequency(v) of a wave is given by λ = c/v where c is the speed of light of the light. v = c/λ Frequency of the given wave = (3 x 10⁸m/s)/(10 x 10^-9m) = 3 Hz.

As per the formula of the photoelectric effect, we have E = K.E. + W_o. E is the energy of photons; K.E. is the kinetic energy with which electrons are emitted and W_o is the work function. K.E. = 5.2 KJ – 3.8 KJ = 1.4 KJ.

The motion with respect to a stationary frame is called absolute motion. Relative motion is with respect to a moving frame of reference.

The formula for relative velocity is V_R = Vector V_A – Vector V_B. Assuming the cars move in the same direction, the relative velocity = 20-50 = -30 m/s. The relative velocity of the second with respect to the first car is 30 m/s.

Relative displacement of B with respect to A = Displacement of B -Displacement of A. On solving we get, relative displacement = 3 m. Hence B is placed at a distance of 3 m from A.

Chlamydomanas exhibits haplontic life cycle i.e. gametophyte are the dominant phase in this life cycle. In this life cycle, there is no independent existence for Sporophyte. Spores produced are haploid and divide mitotically to form Gametophyte.

Sporophyte is the dominant phase. All spermatophytes exhibit diplontic life cycle. Gametophyte depends on the Sporophyte. Sporophyte has independent existence and can perform photosynthesis and hence can prepare their own food.

Rose plant belongs to the category of Angiosperms. All angiosperms and gymnosperms exhibit diplontic life cycle i.e. Sporophyte is the dominant phase and has independent existence.

Generally most of the algae are haplontic whereas few others are diplontic. Fucus is one such algae that exhibits diplontic behavior i.e. Sporophyte is the dominant phase in case of fucus.