The-substance secreted by ductless glands is ………
A) Blood
B) Lymph
C) Enzymes
D) Hormones
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Fill in the blanks If heat energy is given to a substance and its temperature remains constant then the substance undergoes a change in_______.
Correct Answer - state
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……………. defined an element as any substance that cannot be decomposed into further simple substance by physical or chemical change.
B) Robert Boyle
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The glands present in eye are A) lachrymal glands
A) lachrymal glands
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The organism which has ductless glands ………
(D) Human being
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When the particles of a substance contain only one type of atoms, that substance is called a / an
Correct option is B) element
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Semen is a gelatinous substance. It is secreted by ……
(C) Seminal vesicles
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The molecular mass of a substance is the sum of the atomic masses of all the atoms in a molecule of the substance.
Correct option is A) 98 U
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Define. 1. Exocrine glands 2. Endocrine glands
1. Exocrine glands: These glands pour their secretions at a specific site. e.g. salivary gland, sweat gland, etc. 2. Endocrine glands: These glands release their secretions directly into the blood stream,...
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Any food substance when placed on the P gets dissolved in the Q secreted by R in the mouth. Find out the parts P, Q & R
D) P – saliva, Q – salivary glands, R – mouth
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A substance is in light yellow colour. If we put it in sunlight, it changes into grey colour. What is the substance ?
C) Silver bromide
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