Which of the following statement is correct?
(a) Rickettsias lack cell wall
(b) Prions are the smallest free-living cells
(c) The cell wall of Mycoplasmas is made up of amino sugars
(d) Viroids consist of a single-stranded RNA molecule
Answer:
Among living organisms, which one of the following is the most responsible factor for bringing about the origin of a new species?
(a) Sexual Reproduction
(b) Natural Selection
(c) Isolation
(d) Mutation
Answer:
Which of the following is monogamous?
(a) Seal
(b) Deer
(c) Wolf
(d) Walrus
Answer:
Which organelle in the Cell, other than nucleus, contains DNA?
(a) Mitochondrion
(b) Golgi apparatus
(c) Centriole
(d) Lysosome
Answer:
Which of the following is not radioactive?
(a) Zirconium
(b) Tritium
(c) Astatine
(d) Francium
Answer:
Epiphytes are plants which depend on other plants for
(a) Mechanical support
(b) Water
(c) Food
(d) Shade
Answer:
At which stage in its life cycle does the silk worm yield the level is commonly expressed as
(a) Pupa
(b) Imago
(c) Egg
(d) Larva
Answer:
The stones formed in human kidney consist mostly of
(a) Calcium
(b) Magnesium sulphate
(c) Calcium oxalate
(d) Sodium acetate
Answer:
Which of the following can be the blood groups of the parents of a baby having blood group A?
(a) O and AB
(b) A and B
(c) B and AB
(d) All the above
Answer:
Which of the following terms is NOT related to grassland biome?
(a) Pampas
(b) Steppe
(c) Arctic horse
(d) Prairie
Answer: