Which of the following pairs is of unicellular algae?

Match the following joints with the bones involved

\((a)\) Gliding joint	\((i)\) Between carpal and metacarpal of thumb
\((b)\) Hinge joint	\((ii)\) Between Atlas and Axis
\((c)\) Pivot joint	\((iii)\) Between the carpals
\((d)\) Saddle joint	\((iv)\) Between Humerus and Ulna.

Select the correct option from the following

An enzyme catalysing the removel of nucleotides from ends of \(DNA\) is

In Australia, marsupials and placental mammals have evolved to share many similar characteristics. This type of evolution may be referred to as

Select the option which is not correct with respect to enzyme action.

Identify the tissue shown in the diagram and match with its characteristics and its location.

Zygotic meiosis is characteristic of

Given below are two statements: one is labelled as Assertion \(A\) and the other is labelled as Reason \(R\). Assertion \(A\): The potential ( \(V\) ) at any axial point, at \(2 \mathrm{~m}\) distance ( \(r\) ) from the centre of the dipole of dipole moment vector \(\vec{P}\) of magnitude, \(4 \times 10^{-6} \mathrm{C} \mathrm{m}\), is \(\pm 9 \times 10^3 \mathrm{~V}\). (Take \(\frac{1}{4 \pi \epsilon_0}=9 \times 10^9 \mathrm{Sl}\) units) Reason \(R\): \(V= \pm \frac{2 P}{4 \pi \epsilon_0 r^2}\), where \(r\) is the distance of any axial point, situated at \(2 \mathrm{~m}\) from the centre of the dipole. In the light of the above statements, choose the correct answer from the options given below:

Match the following enzymes with their functions

\((a)\) Restriction endonuclease	\((i)\) Joins the \(DNA\) fragements
\((b)\) Restriction exonuclease	\((ii)\) Extends primers on genomic \(DNA\) template
\((c)\) \(DNA\) ligase	\((iii)\) Cuts \(DNA\) at specific position
\((d)\) Taq polymerase	\((iv)\) Removes nucleotides from the ends of \(DNA\)

Select the correct option from the following

Changes in \(GnRH\) pulse frequency in femail is controlled by circulating levels of

Which of the following statements is correct?

Two possible stereo-structures of \(CH_3CHOHCOOH,\) which are optically active, are called

Melotic division of the secondary oocyte is completed