biology general knowledge questions

19.

Photosynthesis takes place faster in
A.     yellow light
B.     white light
C.     red light
D.     darkness
Answer & Explanation

Answer: Option B

Explanation:

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20.

Nucleus, the genetic material containing rounded body in each cell, was first discovered in 1831 by
A.     Robert Hooke
B.     Robert Brown
C.     Rudolf Virchow
D.     Theodore Schwann
Answer & Explanation

Answer: Option B

Explanation:

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21.

Primary phloem develops from
A.     lateral meristem
B.     protoderm
C.     extrastelar cambium
D.     provascular tissue
Answer & Explanation

Answer: Option D

Explanation:

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22.

Other than spreading malaria, anopheles mosquitoes are also vectors of
A.     dengue fever
B.     filariasis
C.     encephalitis
D.     yellow fever
Answer & Explanation

Answer: Option B

Explanation:

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23.

Plants that grow in saline water are called
A.     halophytes    B.     hydrophytes
C.     mesophytes    D.     thallophytes
Answer & Explanation

Answer: Option A

Explanation:

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24.

Pyorrhoea is a disease of the
A.     nose    B.     gums
C.     heart    D.     lungs
Answer & Explanation

Answer: Option B

Explanation:

Pyorrhoea, or periodontal disease, to give it a proper medical term, is a disease of the gums, it is one of the most widely prevalent diseases. It affects the membrane surrounding the roots of the teeth and leads to loosening of the teeth, pus formation, and shrinkage of the gum. This disease is the primary cause for tooth loss among adults.

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