Which of the following is not the alien invasive species?

Gel electrophoresis can separate the DNA fragments because :
(A) Agarose gel has sieving effect
(B) DNA fragments are positively charged.
(C) DNA fragments are of different size.
(D) DNA fragments can move in an electric field.
Choose the correct answer from the options given below :

Which one of the followings is not a common mechanical barrier method for birth control?

Match List I with List II

List I (Terms)	List ll (Features)
(A) Natality	(I) Exit of individuals
(B) Mortality	(II) Entry of individuals
(C) Immigration	(III) Death rate
(D) Emigration	(IV) Birth rate

Choose the correct answer from the options given below:

Identify the statements which are incorrect with respect to medical termination of pregnancy:
(A) MTP is relatively safe during the first trimester of pregnancy
(B) Govt. of India legalised MTP in 1981
(C) MTP is misused to get rid of desired sex determined through amniocentesis
(D) MTP is essential in cases where foetus is found to carrying harmful genes
Choose the correct answer from the options given below:

Observe the illustration and answer the following question:

Meiotic division in primary oocytes is arrested at:

Which one of the following(s) is/ are inverted pyramid in an ecosystem?
(A) Pyramid of energy
(B) Pyramid of biomass (land)
(C) Pyramid of biomass (sea)
(D) Pyramid of Number
Choose the correct answer:

What is the oxidation state of Pt in \(\left( PtF _5\right)_4\) ?

According to Joule's law of heating, the rate of heat produced in a resistor is
(A) directly proportional to the current for the given resistance
(B) directly proportional to the square of the current for the given resistance
(C) directly proportional to the resistance for a given value of current
(D) inversely proportional to the resistance for a given voltage
Choose the correct answer from the options given below:

If the objective function Z = px + qy is maximum at (2,-2) and the maximum value is 8, such that p = 3q, then the values of p and q respectively are:

Answer the question on the basis of passage given below :
A colloid is a heterogeneous system in which a substance is dispersed (dispersed phase) as fine particles in another substance called dispersion medium.
Their particle size is intermediate between that of pure solutions (less than 1 nm) and suspensions (greater than 1000 nm). They are known for interesting properties such as enormous surface area, Tyndall effect, Brownian motion etc.
They are widely used in industries and day to day life.
Some prominent uses of colloids are those in smoke precipitators, purification of water, medicines, cleansers etc.
Which of the following electrolyte exhibits maximum flocculating power in the coagulation of a positive metal hydroxide sol?

Acetaldehyde on treatment with Fehling's solution gives a precipitate of

An electric bulb rated as 220 W, 110 V is used in a circuit having a 220 V supply. For the bulb to deliver 220 W, the resistance to be added in the series is