571. What percentage of the Earth’s surface is covered with water?
A: 10%
B: 30%
C: 75%
(D: 90%)
572. An antibody is made of _ polypeptide chains?
A: 1
B: 2
C: 3
(D: 4)
573. Enterobius vermicularis is commonly known as____________?
A: Flatworm
(B: Pinworm)
C: Hookworm
D: Tapeworm
574. Red to orange pigments are_____________?
(A: Carotenes)
B: Carotenoids
C: Xanthophylls
D: Chlorophyll
575. Destruction of all life forms is called___________?
A: Sterilization
B: Disinfection
C: Antisepsis
(D: Preservation)
576. Animals of which class of arthropoda are present everywhere_____________?
A: Crustacean
B: Insecta
(C: Arachnida)
D: Myriapoda
577. Pox viruses are_________?
A: RNA non-enveloped
B: RNA enveloped
(C: DNA non-enveloped)
D: DNA enveloped
578. Gaseous exchange in birds occurs at the level of_______________?
A: Alveoli
B: Air sacs
C: Bronchi
(D: Parabronchi)
579. Pollen grains in pinus have __ for dispersal through wind?
A: Flagella
B: Cilia
(C: Wings)
D: Feathers
580. The single healthy megaspore retained within the megasporangium germinates to form an egg-containing female gametophyte called______________?
A: Ovule
B: Seed
C: Fruit
(D: Embryo sac)
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