The biodiversity is ______ at lower altitudes and ______ with increasing higher latitudes.

Arrange the following steps of Polymerase Chain Reaction in correct sequence
A. Denaturation of ds DNA
B. Extension of Primers
C. Amplification of desired DNA
D. Primer Annealing
Choose the correct answer from the options given below:

To avoid the unfavourable conditions, the zooplanktons enter into :

Identify the correct statements about test cross.
(A). It can predict the genotype of the test organism
(B). It can distinguish homozygous and heterozygous among test organisms
(C). It is another name for back cross
(D). It is the law of dominance
Choose the correct answer from the options given below:

Read the given passage and answer the question.
ABO blood groups in human beings are controlled by the gene I. The plasma membrane of the red blood cells has sugar polymers that protrude from its surfaces and the kind of sugar is controlled by the gene. The gene (I) has three alleles IA, IB and I. The alleles IA and IB produce a slightly different form of the sugar while allele i does not produce any sugar. Because humans are diploid organisms, each person possesses any two of the three I gene alleles, IA and IB are completely dominant over I.
The number of phenotypes in ABO blood groups is :

Match List - I with List - II.

List-I	List-II
(A) Cuckoo lays egg in crow’s nest	(IV) Brood parasitism
(B) Orchid grows in mango tree	(I) Commensalism
(C) Ticks live on skin of dogs	(II) Parasitism
(D) Species of Wasp and fig species	(III) Mutualism

Choose the correct answer from the options given below :

Read the Passage carefully and answer the the questions
Insulin consists of two short polypeptide chains : chain A and chain B, that are linked together by disulphide bridges. The first clinical gene therapy was given in 1990 to a 4-year old girl with adenosine deaminase (ADA) deficiency. This enzyme is crucial for the immune system to function. Recombinant DNA technology, Polymerase Chain Reaction (PCR) and Enzyme Linked Immuno-sorbent Assay (ELISA) are some of the techniques that serve the purpose of early diagnosis of diseases. 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 (α-1-antitrypsin) used to treat emphysema. Biopiracy is the term used to refer to the use of bio-resources by multinational companies and other organisations without proper authorisation from the countries and people concerned without compensatory payment.
Deficiency of adenosine deaminase (ADA) can be permanently cured by -

The rate of decomposition is slower if :

Which of the following are autosomal recessive gene disorders?
(A) Thalassemia
(B) Phenylketonuria
(C) Haemophilia
(D) Sickle cell anemia
Choose the correct answer from the options given below:

A transmitting station transmits radio waves of wavelength 300 m. The inductance of the coil required with a capacitor of capacity 1.0 \( \mu F \) in a resonant circuit will be

A concave mirror of focal length 6 cm is placed at a distance 'd' from the convex lens of focal length 8 cm. A beam of light coming from infinity and falling on this convex lens-concave mirror combination returns to infinity. The distance 'd' must be equal to:

An electron is projected with uniform velocity along the axis of a current carrying long solenoid. Which of the following is true ?

The sum of the products of elements of any row with the cofactors of corresponding elements is equal to: