Science M.C.Q. [1 M]

(c) June to October
Explanation:Kharif crops are the crops grown in rainy season extending from June to October hence are also called as monsoon crops. These crops are totally rain dependent crops. Kharif crops include paddy, soybean, sugarcane.

(b) X, Y, Z, W
Explanation:The gas having lowest boiling point i.e., highly volatile will be distilled out first and the gas having highest boiling point i.e., least volatile will be distilled out at the last. So, the correct order of gases distilling out is X, Y, Z, W.

(d) corrosion and it is a chemical change
Explanation: corrosion and it is a chemical change

(c) Protein synthesis
Explanation:Ribosomes are the site of protein synthesis on rough endoplasmic reticulums. Long-chain of polypeptides are synthesized on the ribosomes.

(d) Sclerenchyma
Explanation: Sclerenchyma Tissue makes the plant hard and stiff, thickened due to lignin and no inter cellular space. Cells of this tissue are dead and commonly seen in the husk of coconut.

(b) Number of neutrons + Number of protons
Explanation: Atomic number: The total number of protons in the nucleus of an atom gives us the atomic number of that atom. It is represented by the letter Z. All the atoms of a particular element have the same number of protons, and hence the same atomic number. Atoms of different elements have different atomic numbers.
Mass number: The number of protons and neutrons combined give us the mass number of an atom. It is represented using the letter 'A.' As both protons and neutrons are present in the nucleus of an atom, they are together called nucleons.

(a)
Explanation: Uniform motion of a moving object

(a) 5 gwt
Explanation:The reading on the spring balance when suspended freely in the air.

(d) basement membrane
Explanation: Epithelial tissues are physically separated from underlying connective tissues by a basement membrane or basal lamina. The portion of an epithelial cell attached to the basement membrane is called its basal surface.

(a) osmosis
Explanation: Osmosis is the spontaneous net movement of solvent molecules through a semi-permeable membrane (example-cell membrane) into a region of higher solute concentration, in the direction that tends to equalize the solute concentrations on the two sides.

(c) collenchyma
Explanation: Collenchyma cells are refractile, non lignified, living cells with pectocellulose thickening in specific areas of walls, and without intercellular spaces. It provides mechanical strength with flexibility thus allows bending. Besides, it shows growth and elongation of organs, photosynthesize, and stores food and prevents tearing of leaves.

(a) both hybridisation and genetic modification
Explanation: The genetic modification provides an avenue for variety improvement. In other omamentals, there are particularly good varieties with excellent post-harvest qualities, disease resistance, and productivity.
One advantage of hybridization is that it can combine disease resistance of one organism with the production capacity of another. Crop yields increase dramatically when hybridization is used to exceed one or more of the parents in size and reproductive potential.

(c) Golgi apparatus
Explanation: Golgi bodies consist of a system of membrane-bound vesicles arranged in stacks parallel to each other called cisterns. These membranes have connections with the membrane of endoplasmic reticulum (ER). Functions:
1. It also stores, modifies and helps in the packaging of products in vesicles.
2. In some cases, complex sugars may be made from simple sugars in it.
3. It also helps in the formation of lysosomes.

(c)(A) Vapourisation (B) Condensation
Explanation: The correct figure is: