Daily NEET MCQ- June 28, 2022 - NEET MCQ

The given dimensional formula matches with that of force. Force = mass x acceleration.

A simple dimensional equation uses three basic parameters – mass, length and time. Hence the maximum number of unknowns that can be found is 3.

The dimensions of acceleration are LT^-2. On doubling both length and time, the new dimensions become (0.5)*LT^-2.

A French physicist named Louis de Broglie proposed that matter exhibits both particle and wave like nature. This means that like photons, electrons also should have both momentum and wavelength.

Louis de Brogie gave the realation between momentum and wavelength as λ = h/p. Here h is Planck’s constant, whose value is 6.626 x 10^-34 J/s. Wavelength = h/mc = 6.626 x 10^-34 Js/(3.313 x 10^-34 kg x 3 x 10⁸ m/s) = 0.67A°.

As we know, Heisenberg’s principle of uncertainty states that Δx. Δp ≥ h/4π, x is position, p is momentum and “h” is the Planck’s constant. Δx = Δp; Δx. Δx = h/4π; Δx = √h/4π

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 alagae that exhibits diplontic behavior i.e. Sporophyte is the dominant phase in case of fucus.