MHT CET Chemistry Model Test 04 — MHT - CET STD 12 Science — Question

From the following identify the INCORRECT statement/s with respect to the chromosomes.
i. Chromosomes are capable of self replication and play vital role in heredity, mutation, variation, and evolutionary development of eukaryotic species.
ii. Chromosomes are visible during cell division.
iii. Chemically eukaryotic chromosomes are made of mRNA, histone and non-histone proteins.
iv. The number of chromosomes varies within the population of a particular species.

A student of biology wouId suggest which one of the following agricultural practices to control biomagnification of toxic elements in the ecosystem?

A glass tube is open at both ends. A tuning fork of frequency f resonates with the air column inside the tube. Now the tube is placed vertically inside water so that half the length of the tube is filled with water. Now that air column inside the tube is in unison with another fork of frequency f, ____________.

Benzenediazonium chloride on reaction with 'X' gives benzene. Identify X.

If M and N are the midpoints of the sides BC and CD respectively of a parallelogram ABCD, then `overline(AM) + overline(AN)` = ______

____________ is NOT a simple protein.

Three equal masses each of 50 g, are placed at the corners of a right angled isosceles triangle whose two equal sides are 5 cm each. The position of the centre of mass of the system is ____________.

The nervous system of Hydra ____________.

Water absorption takes place through ______.