Identify the statements which are true for oogenesis.
A. Large number of primary follicles degenerate during the phase from birth to puberty.
B. Antrum a fluid filled cavity surrounded by a new theca is seen in primary follicles.
C. At puberty only 6×105-8×105 primary follicles are left in each ovary.
D. Oogonia are formed in fetal ovary.
Choose the the correct answer from the options given below:

The reason for the survival of the melanised moth, during the post-industrialization period in England was:

Arrange the following steps of retrovirus replication sequentially.
A. Production of viral DNA by reverse transcriptase
B. Introduction of viral RNA in host cell
C. Production of new viral RNA by host cell
D. Incorporation of viral DNA into host genome
Choose the correct answer from the options given below:

Which one of the following plants is the source of cannabinoids commonly used in drug abuse?

Arrange the geological periods in order of occurance from the recent to oldest one.
(A) Tertiary
(B) Permian
(C) Carboniferous
(D) Jurassic Choose the correct answer from the options given below:

Match List-l with List-ll

List-l (Terms related to RNA)	List-II (Features)
(A). Capping	(I). Transcribes rRNAs
(B). Polyadenylation	(II). Removal of introns
(C). RNA polymerase I	(III). 5' end-methyl guanosine triphosphate addition
(D). Splicing	(IV). Addition of 200-300 adenylate residues

Choose the correct answer from the options given below:

Arrange the stages of embryo development in a dicot plant.
(A) Heart shaped embryo
(B) Globular embryo
(C) Zygote
(D) Mature embryo
Choose the correct answer from the options given below:

The first clinical gene therapy was given in 1990 to a 4-year-old girl with ___________ .

If \(y=\sin ^{-1} x\), then \(\left(1-x^2\right) \frac{d^2 y}{d x^2}-x \frac{d y}{d x}\) is :

The general solution of the differential equation \(\frac{d y}{d x}=\sin ^{-1} x\) is :

The simple random sample consists of six observations: \(5, 8, 10, 7, 10, 14\). The point estimate of the population mean is:

Read the passage carefully and give the answers to the question :
Does the number of species in a community really matter to the functioning of the ecosystem? This is a question for which ecologists have not been able to give a definitive answer. For many decades, ecologists believed that communities with more species, generally, tend to be more stable than those with less species. According to the International Union for Conservation of Nature and Natural Resources (IUCN) (2004), the total number of plant and animal species described so far is more than 1.5 million.
The scientist who proved that species richness directly correlates with the stability of a community, was

A vertical electric field of magnitude \( 4.9 \times 10^5 \text{ NC}^{-1} \) just prevents a water droplet of mass \( 0.1 \text{ g} \) from falling. What is the charge on the droplet? Take acceleration due to gravity \( 9.8 \text{ ms}^{-2} \).