If in a pond there were 20 lotus plants last year and through reproduction 8 new plants are added, taking the current population to 28, the birth rate is:

The basic steps involved in the genetic modification of an organism inlcude -
(A) Identification of DNA with desirable genes
(B) Production and clinical trial of drugs
(C) Introduction of the identified DNA into the host
(D) Maintenance of introduced DNA in the host and transfer of the DNA to its progeny
Choose the most appropriate combination from the options given below.

Find out the odd one out among the following structures in relation to evolution?

Homologous structures have :

Secondary productivity is :

Mature mRNA is a fully processed

Arrange the given steps in correct sequence of their occurrence when lactose is provided in the growth medium of bacteria:
(A) Operator got free, RNA polymerase binds to promoter
(B) Lactose is hydrolysed to glucose and galactose
(C) Lactose binds to repressor protein
(D) Gene z, y, a are transcribed
Choose the correct answer from the options given below :

The solution of the differential equation \(y d x+\left(x-y^2\right) d y=0\) is :

If 4 individuals in a laboratory population of 40 fruitflies died during a specified time interval, say a week, the death rate in the population during that period is -

If \(A=\left[\begin{array}{cc}1 & -1 \\ 0 & 2\end{array}\right]\) and \(I=\left[\begin{array}{ll}1 & 0 \\ 0 & 1\end{array}\right]\), and \(A^2=3 A+k I\), then the value of \(k\) is:

"The correct statement regarding the basicity of arylamines is :
A. Arylamines are generally more basic than alkylamines because of aryl group.
B. Aryl amines are generally more basic than alkylamines because the nitrogen atom in arylamines is 𝑠⁢𝑝 hybridised.
C. Aryl amines are generally less basic than alkylamines because the lone pair of electrons of nitrogen are delocalised by interaction with the pi electrons of the aromatic ring.
D. Aryl amines are generally more basic than alkylamines because the lone pair of electron of nitrogen are not delocalised by interaction with the pi electrons of aromatic ring.
E. Aryl amines are generally weaker bases than alkylamines due to electron withdrawing nature shown by aryl group.
Choose the correct answer from the options given below:"

Match List-I with List-II

List-I (Physical Quantity)	List-II (SI UNIT)
(A) Mobility of a charge carrier	(I) \( \Omega^{-1} \text{ m}^{-1} \)
(B) Resistivity	(II) \( \text{A m}^{-2} \)
(C) Current Density	(III) \( \text{m}^2 \text{ V}^{-1} \text{ s}^{-1} \)
(D) Conductivity	(IV) \( \Omega \text{ m} \)

Choose the correct answer from the options given below:

What happens when light is refracted into a medium ?