Daily NEET MCQ- June 4, 2022 - NEET MCQ

Here we will use the second equation of motion, s = ut + (1/2)at². Here, u = 0, s = 3600, t = 60s. On solving, we will get a = 2 m/s².

There are primarily 3 equations of motion. These are v = u + at, s = ut + (1/2)at² and v² = u² + 2as.

Here we will use the third equation of motion. The third equation of motion is v² = u² + 2as, u = 0, a = 10, v = 5. Therefore, on solving, we get s = 1.25m.

Henri Becquerel discovered that elements emit radiation and termed this phenomenon as radioactivity. Later Curie on research found out about α-rays, β-rays and γ-rays. Later Rutherford concluded that α particles are helium nuclei.

In this effect, a thin foil (thickness 100nm) made up of gold and coated with fluorescent ZnS screen which is circular around it. α particles mostly move through the gold foil having zero deflection, a small fraction is deflected and one in twenty thousand turns 180°.

For an element, Atomic number(Z) = number of protons in that atoms = numbers of electrons in that atom; Mass number = number of protons + number of neutrons. So Z = 13 and A = 13 + 14 = 27. Hence that element is Aluminium.

Plant cells contain an extra layer outside their cell membrane called cell wall. Cell wall plays a major role in the metabolic activities of a plant cell. It helps in controlling of osmotic pressure.

Artificial classification is based on morphological structures of the plant i.e. artificial classification focuses on external structure of the plants than their internal structure.

The mode of classifying plants as shrubs, herbs and trees come under artificial classification. In this mode of classification, morphological characteristics of plants are considered to be the basis of classification.

Phylogenetic classification considers evolutionary relationships between organisms. Fossil records, cytotaxonomy, chemotaxonomy and numerical taxonomy help in studying their evolutionary structures.