Observe the figure and answer the following:

What is the ploidy of the zygote, antipodal cells and primary endosperm nucleus?

Identify the statements true for RNA.
(A) RNA acts as a genetic material for some viruses.
(B) RNA also functions as an adapter molecule.
(C) RNA has hexose sugar as its backbone.
(D) RNA also acts as catalyst in some cases.
Choose the correct answer from the options given below :

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.
In 'rivet popper hypothesis' the 'rivet' signifies :

Which of the following is a part of detritus food chain?

Read the passage and answer the question : There are thousands of varieties of rice in India alone. The diversity of rice in India is one of the richest in the world. Basmati rice is distinct for its unique aroma and flavour and 27 documented varieties of Basmati are grown in India. There is reference to Basmati in ancient texts, folklore and poetry, as it has been grown for centuries. Several attempts have also been made to patent uses, products and processes based on Indian traditional herbal medicine, e.g. turmeric, neem. There has been growing realisation of the injustice, inadequate compensation and benefit sharing between developed and developing countries. The Indian Parliament has recently cleared a Bill that takes such issues into consideration, including patent terms emergency provisions and research and development initiative.
How many varieties of rice India has?

Match List - I with List - II.

List - I (Organism)	List - II (Product)
(A) Aspergillus niger	(I) Lactic Acid
(B) Acetobacter aceti	(II) Citric Acid
(C) Lactobacillus	(III) Butyric Acid
(D) Clostridium butylicum	(IV) Acetic Acid

Choose the correct answer from the options given below:

Which one of the following step is not involved in the genetic modification
of an organism?

Prehistoric cave art developed about 18000 years ago. Such cave paintings by prehistoric humans can be seen in India at :

If matrix \(A=\left[\begin{array}{ccc}x & 2 & 3 \\ a & y & -5 \\ b & c & 0\end{array}\right]\) isa skew-symmetric matrix, then
(A) x + y + c = 5
(B) c = 5
(C) a + b + c = 0
(D) a + b - c = 10
Choose the correct answer from the options given below:

The function of germ pore in a pollen grain is:

Which of the given alkylhalide would undergo racemisation when hydrolysis is done with aq. KOH?

Match List I with List II

LIST I	LIST II
A. Cyclotron frequency	I. \(\frac{N A B}{K R}\)
B. Magnetic field due to a circular coil	II. \(\frac{q B}{2 \pi m}\)
C. Magnetic field inside a toroid	III. \(\frac{\mu_0 N I}{2 \pi R}\)
D. Voltage sensitivity	IV.\(\frac{\mu_0 I}{2 R}\)

Choose the correct answer from the options given below:

A chain reaction in fission of uranium is possible because