Arrange the following steps in correct sequence with respect to HIV in a host.
(A) Infection of HIV in macrophage cells
(B) RNA replicates to form DNA using Reverse transcriptase
(C) Production of virus particles by host cell
(D) Incorporation of viral DNA in host genome
Choose the correct answer from the options given below:

Resource partitioning among the species is the mechanism to avoid:

Match List-l with List-ll

List-l (Hormones)	List-ll (Functions)
(A) LH	(I) Necessary for maintenance of pregnancy
(B) GnRH	(II) Stronger uterine contractions
(C) Oxytocin	(III) Stimulate secretion of gonadotropins
(D) Relaxin	(IV) Ovulation

Choose the correct answer from the options given below:

Which of the following pair of contrasting traits was not studied by Mendel ?

Which one of the following is not a method of in-situ conservation of biodiversity?

In which region of the fallopian tube, fertilization of sperm and ovum takes place?

Which of the following hormones are secreted by placenta?
(A) hCG
(B) hPL
(C) Estrogens
(D) Progestogens
(E) Relaxin
Choose the correct answer from the options given below:

"The nucleus \( ^{23}_{10}\text{Ne} \) decays by \(\beta\)^- emission. The maximum kinetic energy of the emitted electrons is :
Given that : \( m(^{23}_{10}\text{Ne}) = 22.994466 \text{ u} \), \( m(^{23}_{11}\text{Na}) = 22.989770 \text{ u} \) and \( 1 \text{ u} = 931 \text{ MeV/c}^2 \)

The photoelectric current is directly proportional to the number of photo electrons emitted per second. This implies that

If the area of a triangle whose vertices are \((-2,4),(2,-6)\) and \((k, 4), k>0\), is 35 sq.units, then the value of \(k\) is

Two slits are kept 1 mm apart and the screen is placed 1.0 m away. What is the fringe separation when blue-green light of wavelength 500 nm is used ?

If charge is moving parallel to uniform magnetic field, its path will be:

Read the passage carefully and answer the questions
Ethers with the general formula \(C _n H _{2 n+2} O\) and functional group C-O-C may be divided as symmetrical and unsymmetrical.
Lower symmetrical ether may be obtained by the dehydration of alcohols at low temperatures in the presence of protic acids,
such as \(H _2 SO _4\) and \(H _3 PO _4\) whereas at high temperature intramolecular dehydration takes place.
Formation of ether from primary alcohols is also accompanied by the formation of small amount of alkenes.
Due to the steric hinderance, secondary and tertiary alcohols undergo elimination reaction rather than substitution reaction yielding alkene as major product. Ethers can also be obtained by heating alkyl halides with sodium or potassium alkoxides.
Substituted Ethers (secondary & tertiary) can also be prepared using this method.
If primary halides are replaced with secondary and tertiary halides, alkenes are the major products.
The major product in the following reaction is \(ROH + HOR \xrightarrow{ H _2 SO _4, 140^{\circ} C }\)