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CSAT Prelims Biology - General Knowledge Questions and Answers for UPSC Exam | Page-16

(151) Which one of the following is a useful functional association between fungi and the roots of higher plants?
[A] Lichen
[B] Biofertilizer
[C] Coralloid root
[D] Mycorrhiza

Comment

Answer: Option [D]
(152) Soft drinks such as cocoa contain significant quantities of:
[A] renin
[B] tannin
[C] caffeine
[D] nicotine

Comment

Answer: Option [C]

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(153) Epiphytes are plants which depend on other plants for
[A] shade
[B] food
[C] water
[D] mechanical support

Comment

Answer: Option [D]
(154) When ants bite, they inject
[A] Methanol
[B] Stearic acid
[C] Formic acid
[D] Glacial acetic acid

Comment

Answer: Option [C]
(155) At which stage in its life cycle, does the silk worm yield the fibre of commerce?
[A] Pupa
[B] Egg
[C] Imago
[D] Larva

Comment

Answer: Option [A]
(156) Antigen is a substance which
[A] is used to treat poisoning
[B] stimulates formation of antibody
[C] lowers body temperature
[D] destroys harmful bacteria

Comment

Answer: Option [B]
(157) When one gene controls two or more different characters simultaneously, the phenomenon is called
[A] polyteny
[B] polyploidy
[C] pleiotropy
[D] apomixes

Comment

Answer: Option [B]
(158) Among living organisms, which one of the following is the most responsible factor for bringing about the origin of a new species?
[A] Isolation
[B] Mutation
[C] Sexual reproduction
[D] Natural selection

Comment

Answer: Option [A]
(159) Octopus is
[A] an echinoderm
[B] an arthropod
[C] a hemichordate
[D] a mollusk

Comment

Answer: Option [D]
(160) In human body, which one of the following hormones regulates blood calcium and phosphate?
[A] Thyroxine
[B] Glucagon
[C] Growth hormone
[D] Parathyroid hormone

Comment

Answer: Option [D]

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