Grey crescent develops in (1) Eye of frog (2) Fertilized egg of frog (3) Brain of rabbit (4) Eye of cockroach
Answer: (2) Grey crescent is a crescent-like and grey-coloured area that develops across from the sperm entry point on the... View Article
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Fertilizin is (1) Phospholipid (2) Steroid (3) Carbohydrate (4) Glycoprotein
Answer: (4) Fertilizin is a glycoprotein that is found on the membrane of the ovum. Fertilizin is the chemical substance... View Article
Which is the edible part in cauliflower?
Answer: Cauliflower is a vegetable. Flowers of cauliflower are edible flowers. It is an annual plant reproducing by seed. Usually,... View Article
Inulin is a polymer of (1) Glucose (2) Fructose (3) Galactose (4) Arabinose
Answer: (2) Inulin is a polymer of fructose, present in many plants. It is found in roots and rhizomes. Inulin... View Article
What is meant by aquatic animals and terrestrial animals?
Answer: Habitat is a part of an ecosystem. The climate, plants, and animals are the identities of a habitat. Ecosystems... View Article
What is the chemical formula for marble?
Answer: The chemical name of marble is calcium carbonate. It is an inorganic chemical compound with the chemical formula CaCO3.... View Article
Copper forms two chlorides CuCl and CuCl2 (1) Identify the copper ions in these compounds? (2) What is the valency of copper in each of these compounds? (3) By writing the sub-shell electronic configuration of copper, find out a sub-shells from which the electrons are lost to form these ions. (4) Write the period and group to which copper belongs. (Hint: Atomic number of copper =29)
Answer: Given Copper forms two chlorides CuCl and Atomic number of copper (Cu) = 29.CuCl2 (1) The copper ions in... View Article
Who is known as the Father of Immunology?
Answer: Edward Anthony Jenner is regarded as the Father of Immunology. He received this title because of his achievement in... View Article
Arteries and veins are joined by a network of _________
Answer: Arteries and veins are joined by a network of capillaries throughout the body. The human circulatory system consists of... View Article
From below given colors, which colour is not present in 7 colours of rainbow? (1) Violet (2) Purple (3) Green (4) Indigo
Answer: (2) In the rainbow spectrum, there are seven colours known as VIBGYOR and each colour has a different wavelength.... View Article
Describe in brief the structure and function of placenta.
Answer: Placenta refers to the temporary vascular organ found in mammals, which attaches the fetus to the uterus of the... View Article
Write the general formula of aldehyde.
Answer: Aldehyde is a chemical compound with a functional group -CHO. In aldehydes, the carbonyl group has one hydrogen atom... View Article
What is a balanced chemical equation? Why should chemical equations be balanced?
Answer: The representation of a chemical reaction in the form of substances is known as a chemical equation. The equation... View Article
An athlete completes one round of a circular track of diameter 200 m in 40 s. If he continues to run, what will be the distance covered and the displacement at the end of 2 minutes 20 s respectively ? (1) 2200m , 200m (2) 2200m, 0m (3) 4400m, 400m (4) 2200m, 400m
Answer: (1) Given Diameter (d) = 200 m Radius (r) = 100 m Displacement is defined as the shortest distance... View Article
Who proposed the sandwich model of plasma membrane? (1) Davson and Danielli (2) Rebartson (3) Singer and Nicolson (4) Benson
Answer: (1) The cell membrane also known as a cytoplasmic membrane or plasma membrane is a biological membrane that protects... View Article
Leaf base is sheathing in (1) Wheat (2) Maize (3) Grass (4) All of the above
Answer: (4) Generally leaf base, petiole, and lamina, together form the main parts of a leaf. leaf base is the... View Article
The most abundant metal in the earth’s crust is : (1) Iron (2) Nickel (3) Aluminium (4) Sodium
Answer: (4) In the earth crust, oxygen percentage is 46.6 but oxygen belongs to the non-metal group. The most abundant... View Article
What is the full form of PVC?
Answer: The full form of PVC is polyvinyl chloride. PVC is made of vinyl chloride monomer by condensation polymerization and... View Article
What do you understand by bond pairs and lone pairs of electrons? Illustrate by giving one example of each type.
Answer: In the formation of a covalent bond between two atoms, each atom will share one electron. The electrons present... View Article
What is chyme?
Answer: In the stomach, food and water are mixed properly to form a slurry known as chyme. After this process,... View Article
