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821.

Cork cells are impervious to water because of the presence of
(a)Suberin
(b)Lignin
(c)Cutin
(d)Cellulose
Comment
Answer is: A

822.

The biotic relationship between insects and plants with reference to pollination is called
(a)Mutualism
(b)Commonsalism
(c)Saprophytism
(d)Parasitism
Comment
Answer is: A

823.

Photosynthesis generally takes place in which portions of the plant ?
(a)Leaf and other chloroplast bearing parts
(b)Bark and leaf
(c)Roots and chloroplast bearing parts
(d)Stem and leaf
Comment
Answer is: A

824.

Opium is obtained from
(a)Latex juice
(b)Tablet type latex
(c)Seed capsule of opium poppy
(d)Poppy leaves
Comment
Answer is: C

825.

Binomial nomenclature system was introduced
(a)Mendel
(b)Darwin
(c)Linnaeus
(d)None of these
Comment
Answer is: C

826.

RNA differs from DNA in containing
(a)Deoxyribose
(b)Cytocine
(c)Phosphate
(d)Ribose
Comment
Answer is: D

827.

Which of the following glands has both an endocrine and an exocrine function ?
(a)Mammary
(b)Thyroid
(c)Adrenal
(d)Pancreas
Comment
Answer is: D

828.

Pepsin converts
(a)Protein into peptides in neutral media
(b)Protein into peptides in acid media
(c)Starch into glucose
(d)Protein into peptides in alkaline media
Comment
Answer is: B

829.

Adrenocorticotrophic harmone (ACTH) is secreted by
(a)Thyroid
(b)Pituitary
(c)Adrenal
(d)Pancreas
Comment
Answer is: B

830.

A green leaf is partially covered and placed in the light for several days. If it is then boiled and tested for starch with iodine, what will be the result ?
(a)Starch will not be found in the leaf at all
(b)Starch will be found in the entire leaf
(c)Starch will be found only in the part of the leaf exposed to light
(d)Starch will be found only in the shaded part of the leaf
Comment
Answer is: C

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