Neco Gce 2018 Biology Answer Now Available.

Biology-Obj

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Biology-Theory

(2ai)
reflex action, is an involuntary and nearly instantaneous movement in response to a stimulus.

(2aii)
(i)pineal gland
(ii)pituitary gland
(iii)pancreas
(iv)ovaries

(2bi)
(i)Enzymes are biological catalysts
(ii)They speed up reactions although they are not changed in the reaction
(iii)Enzymes are proteins, and therefore are folded chains of amino acids with a specific shape.
(iv)Enzymes speed up reactions by bringing reactants together and reducing the activation energy required to start the reaction

(2bii)
-Respiration-
(i)It takes place in all the living cells of plant.
(ii)This catabolic process continues throughout the day and night.
(iii)Utilizes oxygen and carbohydrates.
(iv)The end products of respiration are carbon dioxide and water.
(v)The energy released from carbohydrates and other respiratory substrates is trapped in ATP (Adenosine Triphosphate) on oxidation. However, some energy is also lost in the form of heat.

-Photosynthesis-
(i)It takes place only in the cells containing chlorophyll.
(ii)It takes place only in the presence of light.
(iii)Photosynthesis utilizes carbon dioxide and water.
(iv)The end products of photosynthesis are carbohydrates and oxygen.
(v)During photosynthesis, the light energy is converted into chemical energy in the form of carbohydrate.

(2ci)
(i)hydrostatic skeleton
(ii)exoskeleton
(iii)endoskeleton

(2cii)
(i)regulation of PH
(ii)regulation of osmolarity
(iii)production of hormones

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