Which one of the following statement is incorrect about ecological pyramids?

Read the following passage carefully and answer the given questions.
Cancerous cells just continue to divide giving rise to masses of cells called tumors. Benign tumors normally remain confined to their original location and do not spread to other parts of the body and cause little damage. The malignant tumors, on the other hand are a mass of proliferating cells called neoplastic or tumor cells. Transformation of normal cells into cancerous neoplastic cells may be induced by physical, chemical or biological agents. Ionising radiations like X-rays and gamma rays and non-ionizing radiations like UV cause cancer. Cancer-causing viruses are called oncogenic viruses which have viral oncogenes. The substances to which an immune response is produced are called allergens. The antibodies produced to these are of IgE type. Common examples of allergens are mites in dust, pollens, animal dander, etc. The primary lymphoid organs are bone marrow and thymus. The secondary lymphoid organs provide the sites for interaction of lymphocytes with the antigen, which then proliferate to become effector cells.
The tumors that remain confined to their original location and do not spread to other parts of the body are:

The pollination which involves the transfer of pollen grain from the anther
to the stigma of another flower of the same plant is known as-

Arrange the following events in correct sequence :
(A) Virus infects macrophages
(B) Viral DNA is produced by reverse transcriptase
(C) Viral DNA incorporates into host genome
(D) Viral RNA is introduced into macrophages
(E) New viruses are produced
Choose the correct answer from the options given below :

Match List - I with List - II.

List - I	List - II
(A) Barrier methods	(I) Prevents physical contact between ovum and sperm
(B) IUD	(II) Sterilizes physical contact between ovum and sperm
(C) Oral Contraceptives	(III) Increases phagocytosis of sperms and suppress sperm motility:

Choose the correct answer from the options given below :

Number of births during a given period in a population is called as

Match List-l with List-II

List - l (Terms)	List - lI (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:

Read the following passage carefully and answer the given questions
The separated DNA fragments can be visualized only after staining the DNA with ethidium bromide followed by exposure to UV radiation. Bright orange colored bands of DNA in ethidium bromide stained gel exposed to UV light can be seen. The separated bands of DNA are cut out from the agarose gel and extracted from the gel piece. This step is known as elution. The DNA fragments purified in this way are used in constructing recombinant DNA by joining them with a cloning vector.
The DNA fragments are separated by-

Electric field intensity at a point varies as \( \frac{1}{r^3} \) due to:

for \(|x|<1, \sin \left(\tan ^{-1} x\right)\) equal to:

The general solution of the differential equation \(\frac{d y}{d x}+4 x y^2=0\) is :

The value of determinant \(\left|\begin{array}{lll}a-b & b-c & c-a \\ b-c & c-a & a-b \\ c-a & a-b & b-c\end{array}\right|\) is :

Arrange these ions into decreasing order of their ionic radii :
(A) \(\text{Ce}^{3+}\)
(B) \(\text{Pr}^{3+}\)
(C) \(\text{La}^{3+}\)
(D) \(\text{Nd}^{3+}\)
(E) \(\text{Pm}^{3+}\)
Choose the correct answer from the options given below :