Match List-I with List-II

List-I (Causes of biodiversity losses)	List-II ( Examples)
(A) Habitat loss and fragmentation	(I). Parthenium, Lantana and water hyacinth (Eichornia)
(B) Over-exploitation	(II). Co-evolved plant-pollinator mutualism
(C) Alien species invasion	(III). Deforestation for conversion of forest to grasslands
(D) Co-extinctions	(IV). Excessive fishing and over harvesting of certain fish populations

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Which one of the following hormones is produced only during pregnancy?

Meiotic division taking place during oogenesis is an unequal division resulting in the formation of a:

Which of the following does not have direct role in genetic engineering?

Which of the following facts are not true about GM crops ?
(A) They are more tolerant to abiotic stress (cold, drought, heat, salinity, etc.).
(B) They are pest-resistant.
(C) They cause early exhaustion of soil fertility.
(D) The food produced has decreased nutritional value.
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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
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Match List-I with List-II

List-I (Hormones)	List-II (Role/functions)
(A) LH	(I) Causes stronger uterine contractions
(B) FSH	(II) Essential for maintenance of the endometrium during menstrual cycle
(C) Oxytocin	(III) Acts on Leydig cells and stimulates synthesis and secretion of androgens
(D) Progester one	(IV) Acts on Sertoli cells and stimulates secretion of some factors which help in the process of spermiogenesis

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Identify the microbes producing commercially important organic acids and enzymes from the given options:
(A) Trichoderma polysporum
(B) Streptococcus
(C) Clostridium butylicum
(D) Aspergillus niger
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The area of the region bounded by the curve \(y=\sqrt{a^2-x^2}\) and \(x\) - axis included between the lines \(x=0\) and \(x=a\) is

Read the following paragraph carefully and answer the given questions.
In the year 1963 the two enzymes responsible for restricting the growth of bacteriophage in E. coli were isolated. The first restriction endonuclease - Hind II, whose functioning depended on a specific DNA nucleotide sequence was characterized five years later. It was found that Hind II always cut DNA molecules at a particular point by recognizing a specific sequence of six base pairs. This specific base sequence is known as the recognition sequence for Hind II. Besides Hind II, today we know more than 900 restriction enzymes that have been isolated from over 230 strains of bacteria, each of which recognize different recognition sequences.
In EcoR I the latter 'R' is derived from the -

In the conversion of ethanol to ethene, the first step of the reaction involves the formation of

The ratio of speeds of X-rays of wavelength \(10^{-9} m\) and visible light of wavelength \(10^{-7} m\) in vacuum is :

Let A and B be two events. Then which of the following statements are TRUE?
(A) \(P(B \mid A)=\frac{P(A \cap B)}{P(A)}\), provided \(P(A) \neq 0\)
(B) \(P\left(B^{\prime}\right)=1+P(B)\)
(C) \(P(A \cup B)=P(A)+P(B)+P(A \cap B)\)
(D) \(P(A \cap B)=P(A) \cdot P(B)\) if A and B are independent events
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