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Correct Option (c) 2 A 

Explanation :

Applying Kirchhoff's first law

Correct Option (c) 3 < 2 < 1

Explanation :

Figure 3 is stream lined, so air resistance of it will be least. For figure 1 surface area is maximum so air resistance for it is minimum

 :. Correct order is 3 < 2 < 1

Correct option (b) ε_r = 1.5, μ_r = 0.5    

Explanation:

For diamangnetic material 0 < μ_n < 1

and for any material ε_n > 1

so, (b) is correct

Correct option [d] squamous epithelium

Correct option [d] a mantle and non-segmented body

Correct option [b] ciliated epithelium 

Correct option [a] Haemoglobin 

Correct option [d] sea horse

Correct Option (a) Determine any hereditary disease in the embryo

Correct Option  (c) Is opaque to infrared rays

Correct option [c] Nitrate 

Correct Option (a) 639 

Correct Option (c) Papilionaceae 

Correct Option (b) Hybridisation of DNA of one organism to that of others

Correct option [a] cellulose 

Correct Option (a) Hypothalamus

Correct option [b] carbonic anghydrase

Correct Option (c) Double fertilization

Correct Option (b) Sagittaria

Correct Option (b) salivary gland of larvae

Correct Option  (d) acetyl Co–A

Correct option [b] influx of K⁺ ions

Correct Option (d) reduced mechanical tissue and xylem

Correct option [b] caused by a change in a single base pair of DNA

Correct Option (c) Conservation of water

Correct option [c] O₃ 

Correct Option  (b) digestion or breakdown of organic compounds

Correct Option (a) nephron

Correct Option (c) secondary meristem

Correct option [a] S-phase 

The correct option is(1) Grasses

Explanation:

Secondary growth occurs due to the presence of vascular cambium. Grasses are monocot and lack vascular cambium. Therefore, they do not show secondary growth.

Deciduous angiosperms are usually woody dicot plants and show secondary growth. Conifers and cycads are gymnosperms and usually show anomalous secondary growth.

Correct Option(2) Biopiracy

Explanation:

Biopiracy is referred to the use of bioresources bl multinational companies and other organisations without proper authorisation front the countries and people concerned without compensatory payment. Bio-infringement is the commission of a prohibited act with respect to a patented invention without permission from the patent holder. Bio-exploitation means taking advantage of biological resources of other countries without permission. Biodegradation is a biological breakdown of organic material by bacteria, fungi, etc.

The correct option is(2) Adventitious root

Explanation:

Sweet potato is a modified adventitious root which is meant for storage of food. It does not assume a definite shape and occurs singly. 

Tap roots develop from the radicle of the embryo. They gradually become narrow towards the tip. Stem is usually the above-ground erect ascending part of the plant body. It bears leaves and flowers. Rhizome is modified underground stem, e.g, Zingiber Officinale.

Correct option (a) Step I 

Explanation:

Rate law suggest that rate determining step is ste (I)

Correct Option (b)

Correct Option (c) Epididymis 

Correct Option (a) I and IV 

Correct Option (a) Both A and R are true and R is the correct explanation of A

Correct Option (d) Normal

Answer is : (c) They function as promoters

Enhancers are DNA sequences that facilitate the expression of a given gene. They may be located few hundred base pairs away from the gene.

Whereas, promoter is a DNA sequence at which RNA polymerase may bind, leading to the initiation of transcription.

Correct Option (c) ATP production in respiration

Correct Option (a) Photo-oxidation during photosynthesis

Correct option [a] chloroform 

The correct option is (2) Goblet Cells.

Explanation:

Goblet Cells -  The intestinal mucosal epithelium has goblet cells which secrete mucus.  

- wherein

The secretions of the brush border cells of the mucosa along with the secretions of the goblet cells constitute the intestinal juice or succus entericus 

Secretion of globet cells i.e. mucus protects the GI tract from various enzyme.

Answer is : (a) incomplete dominance

Tay-Sachs disease is an example of incomplete dominance. In this disease, mutations in the gene coding for an enzyme, hexosaminidase that causes neurological dysfunction. This enzyme breaks down lipid byproducts gangliosides in the cell’s lysosomes. In Tay-Sachs disease, homozygous recessive individuals are severely affected with a fatal lipid-storage disorder, whereas, heterozygous individuals have only 50% of enzyme activity found in normal individuals.

Answer is : (d) 7 : 108

For first line of Lyman series, n₁ = 1 and n₂ = 2

\(\therefore\frac{1}{\lambda_1}=R\left(\frac{1}{1^{2}}-\frac{1}{2^{2}}\right)\) \(=R\left(1-\frac{1}{4}\right)=\frac{3R}{4}\)

For first line of Paschen series, n₁ = 3 and n₂ = 4

\(\therefore\frac{1}{\lambda_2}=R\left(\frac{1}{3^{2}}-\frac{1}{4^{2}}\right)\) \(=R\left(\frac{1}{9}-\frac{1}{16}\right)=\frac{7R}{144}\)

\(\frac{\lambda_1}{\lambda_2}=\frac{7R}{144}\times\frac{4}{3R}=\frac{7}{108}\)

Correct Option (b)

Correct Option (b) thymus 

Correct Option (b) 0.19 

Answer is : (b)

(A) Astigmatism-It can be corrected with the use of cylindrical lens.

(B) Hypermetropia-To overcome from this problem a convex lens is used.

(C) Myopia-It is also know by short sightedness and can be corrected with the use of concave lens.