STD 11 - 4. Animal kingdom — NEET STD 11 Science — Question

Which of the following means of reducing birth-rate is not legitimate in India

Rana Tigerinum is the zoological name of

Which of the following statements are correct ?
(A) Multiple step large mutation is called saltation which caused speciation.
(B) Hardy-Weinberg principle states the concept that frequency of occurence of alleles of a gene in a population remains constant from generation to generation.
(C) The total genes and their alleles in a population constitute gene pool.
(D) According to Hardy-Weinberg principle, sum total of all the allelic frequencies is one.
(E) If in a diploid organism, p and q represent the frequency of allele A and a, then probability that allele 'A' will appear on one chromosome and allele 'a' on another chromosome is 2pq.
(F) The five factors that affect Hardy-Weinberg equilibrium are gene migration, genetic drift, mutation, genetic recombination and natural selection.
(G) When original drifted population becomes founders by any chance event, then effect is called founder effect.
(H) When natural selection causes more individuals to acquire value other than mean character value it is called disruptive change and when it causes more individuals to acquire peripheral character value at both ends of the distribution curve, it is called directional.
(I) Jawless fish probably evolved around 350 bya.
(J) The first organisms to invade land were animals.
Choose the correct option given below :-

Platyhelminthes are also called

Assertion : Cocaine has a potent stimulating action on central nervous system, producing a sense of euphoria and increased energy.

Reason : Injecting the microbes intentionally during immunisation or infectious organisms gaining access into body during natural infection induces active immunity.

Modification of leaves as Tendrils & Thorns in plants are an example of

In pea hybrids between red flowered and white flowered strains were crossed back to pure red flowered strain. The progeny of this cross will have