biology MCQs – Page 54

Practise multiple-choice questions from biology for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

biology Mcqs
1061. The characteristic which enable animals to tolerate dehydration is called__________?
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A. Anhydrobiosis

B. Osmoregulaton

C. Anhydrosis

D. Osmoconformation

1062. Sub- phylum vertebrate is also known as__________?
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A. Craniata

B. Amphibia

C. Aves

D. Pisces

1063. Cuticular transpiration is _________ of total transpiration?
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A. 4-6%

B. 7-9%

C. 5-7%

D. 6-8%

1064. Sporogony of malaria parasite occurs in _______ ?
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A. RBC of man

B. Liver of man

C. Salivary glands of mosquito

D. Stomach wall of mosquito
1065. A pressure created by active secretion of salts and other solutes from other cells into xylem sap is called___________?
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A. Root pressure

B. Osmotic pressure.

C. Transpiration pull

D. None of these

1066. Which is not a vertebrate ?
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A. Fish

B. None of these

C. Insect

D. Reptiles

1067. Vacuoles are fluid filled sacs surrounded by a membrane called__________?
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A. cell membrane

B. tonoplast

C. nuclear membrane

D. cell wall

1068. Unlike other algae, diatoms do not readily decay due to___________?
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A. Water proof cell

B. Mucilaginous wall

C. Nonliving cells

D. Siliceous wall
1069. The nephridia of earthworm open into the coelom by_________?
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A. Flame cell

B. Anus

C. Nephridiopore

D. Nephrostome
1070. In the root cells _______ pathway becomes discontinuous in the endodermis due to the presence of casparian strip.
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A. Symplast

B. Apoplast

C. Vacuolar.

D. Tonoplast

1071. In which phase of cell cycle cell organelles are formed?
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A. G1 Phase

B. G2 Phase

C. S Phase

D. G0 Phase

1072. Cytoplasmic strands that extend through pores in adjacent cell walls are known as___________?
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A. Pseudopods

B. Plasmodesmata

C. Symplasts

D. Pili

1073. Centric discoid form of diatoms is__________?
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A. Diplaneis

B. Stephanodis

C. Camphyloneiscus

D. Coscinodiscus
1074. 95% of the cytoplasm of red blood cells is the___________?
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A. Hemoglobin

B. Enzymes

C. Proteins

D. Antibodies

1075. Marine fish can keep their internal environment hypertonic with respect to the surrounding salty water by retaining.
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A. Excessive urea which will increase their internal solute concentration and prevent body shrinkage in hypertonic environment

B. Trimethyl alanine

C. Ammonia

D. Trimethylamine oxide
1076. Sweat glands occur in greatest number in the skin of the__________?
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A. Armpits

B. Back

C. Palm of hand

D. Forehead

1077. Cooleys anemia is another name used for___________?
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A. None of these

B. Sickle cell anemia

C. Leucemia

D. Thalassaemia
1078. In mouth cavity of many molluscs there is a rasping tongue like structure_________provided with many horny teeth.
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A. Radula

B. Muscle

C. Ligule

D. Mantle

1079. Malphighian tubules absorb waste materials and salts from__________?
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A. Hemolymph

B. Blood

C. Lymph

D. Gut

1080. Active transport is dependent on____________?
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A. None of these

B. Photophosporylation

C. Photosynthesis

D. Respiration