Arrange the following evolutionary human species in order of their appearance on earth from the current to the oldest one.
(A) Homo erectus
(B) Neanderthal man
(C) Dryopethicus
(D) Homo sapiens
Choose the correct answer from the options given below:

Arrange the following steps of experiments performed by Griffith in correct series.
(A) 'S' strain injected into mice → Mice died
(B) 'S' strain (Heat killed) → injected into mice Mice lived
(C) 'R' strain injected into mice → Mice lived
(D) 'S' strain (Heat killed) + 'R' Strain (Live) → injected into mice Mice died
Choose the correct answer from the options given below :

Read the following passage carefully and answer the given questions.
Insulin consists of two short polypeptide chains- chain A and chain B, that are linked together by disulphide bridges. Some strains of Bacillus thuringiensis produce proteins that kill certain insects such as lepidopterans, coleopterans and dipterans. Bt toxin protein is converted into an active form of toxin due to the alkaline pH of the gut which solubilise the crystals. Transgenic animals that produce useful biological products can be created by the introduction of the portion of DNA (or genes) which codes for a particular product such as human protein (alpha-1-antitrypsin) used to treat emphysema. Plants, bacteria, fungi and animals whose genes have been altered by manipulation are called Genetically Modified Organisms (GMO). GM plants have been useful in many ways. Genetic modification has: (i) made crops more tolerant to abiotic stresses. (ii) reduced reliance on chemical pesticides (pest-resistant crops). (iii) helped to reduce post harvest losses. (iv) increased efficiency of mineral usage by plants (this prevents early exhaustion of fertility of soil). (v) enhanced nutritional value of food.
The beetles that infest Bt cotton plant are killed:

Transgenic animals are used to understand the contribution of genes in the development of diseases such as:

Gause's 'Competitive Exclusion Principle' states that :

The pioneer species of primary succession in water are:

The density of a population in a given habitat during a given period, fluctuates due to changes in -
(A) Natality
(B) Immigration
(C) Emigration
(D) Mortality
Choose the correct answer from the options given below:

In a 500 m race, the ratio of speeds of two participants, A and B, is 4 : 5 respectively.
If A has a start of 180 m, then the distance by which A wins is :

By increasing the temperature, the specific resistance of a conductor and a semiconductor

A charge q moves with a velocity of \(2 m s^{-1}\) along x-axis in a uniform magnetic field \(\vec{B} = \hat{i} + 2\hat{j} + 3\hat{k}\), then charge will experience a force

In cyclotron, an ion is made to travel successively along semi circles of increasing radius under the action of magnetic field. Which of the following factor on which angular velocity of the ion is not dependent?

The total number of ions produced from the compound \(\left[ Cr \left( NH _3\right)_6\right] Cl _3\) in aqueous solution will be:

Solution of \(\frac{d y}{d x}+y=2\) is: