Question

(b) Give the biological technical terms for the following: 151
(i) Chemicals found in the blood which act against
antigens.
(ii) A constituent that causes pollution.
(iii) The onset of menstruation in a young girl.
(iv) Structure which connects the placenta with the
foetus.
(v) The fluid present between the layers of
e
meninges.
(vi) Permanently open structures seen on the bark
of an old woody stem.
(vii) The biological process which is the starting
point of the food chain.
(viii) The change in an organism resulting due to
stimulus.
(ix) An Antiseptic substance present in tears.
(x) A solution in which the relative concentration
of water molecules and the solute on either side of the
cell membrane is the same.
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Answer 1

(i) Chemicals found in the blood which act against antigens.

➟ Immunoglobulin

(ii) A constituent that causes pollution.

➟ Pollutant

(iii) The onset of menstruation in a young girl.

➟ Menarche

(iv) Structure which connects the placenta with the foetus.

➟ Umbilical cord

(v) The fluid present between the layers of meninges.

➟ Cerebrospinal fluid

(vi) Permanently open structures seen on the bark of an old woody stem.

➟ Lenticels

(vii) The biological process which is the starting

point of the food chain.

➟ Photosynthesis

(viii) The change in an organism resulting due to

stimulus.

➟ Response

(ix) An Antiseptic substance present in tears.

➟ Lysozyme

(x) A solution in which the relative concentration

of water molecules and the solute on either side of the cell membrane is the same.

➟ Isotonic

_____________________

Answer 2

i) Immunoglobulin

ii) Pollutant

iii) Menarch

iv) Umbilical cord

v) Cerebrospinal fluid

vi) Lenticels

vii) Photosynthesis

viii) Reflex action

ix) Lysozymes

x) Isotonic solution

         

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