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What is the significance of transpiration in plants? (3mks)
(a) What are meristems? (1mk)Regions of plants where active cell division and differentiation takes place. (b)(i) What is the role of cork-cambium in secondary growth? (1mk)Form the bark of the stem (ii) Name the meristem that is responsible for increase in length of stems (1mk)apical meristem K.C.S.E Biology Q & A - MODEL 2016PP1QN28
The diagram below shows a transverse section of a plant organ
​(a) Name the plant organ from which the section was obtained.
(b) (î) Name the class to which the organism from which section was obtained belongs. (ii) Give a reason for your answer in b (i) above. ​(c) Name the part labeled X
answers
(a) Stem
(b) (i) Monocotyledonae (ii) Vascular bundles are scattered and not arranged in a ring Absence of pith/ cambium (c) Epidermis K.C.S.E Biology Q & A - MODEL 2014PP1QN23
Below is an illustration of a cross section of a plant root showing the transportation of substances in the plant.
​(a) Name the substances transported along the paths labelled K and L.
K L (b) Give a reason for your answer in L above.
ANSWERS
​(a) K - Photosynthetic products/manufactured foods example vitamins/alicose/proteins/sucrose/maltose/fructose/lipids/nitrates;
L - Water and mineral salts; (b) The substances are moved into the star shaped xylem;
K.C.S.E Biology Q & A - MODEL 2013PP1QN25
State one adaptation of xylem vessels to their function.
answers
K.C.S.E Biology Q & A - MODEL 2013PP1QN07
Explain how the following forces contribute to the movement of water up the xylem vessels:
(a) cohesion; (b) adhesion.
answers
(a) Water molecules cling to each other maintaining a continuous column of water/preventing the break of water column;
(b) Water molecules cling to the sides of the xylem vessel walls;
K.C.S.E Biology Q & A - MODEL 2012PP1QN18
Why are plants able to accumulate most of their waste products for long?
answers
K.C.S.E Biology Q & A - MODEL 2010PP1QN04
The diagram below shows a specialized plant cell.
(a) (i) Name the cell.
(ii) Name the parts labelled D and E. D E (b) State the function of the part labelled C.
answers
(a)(i) Root hair cell;
(ii) D—cell wall; E — cellsap vacuole; (b) Controls the functioning of the cell; K.C.S.E Biology Q & A - MODEL 2010PP1QN02
The diagram below shows a transverse section of a plant organ.
(a) Name the plant organ from which the section was obtained.
(b) (i) Name the class to which the plant organ was obtained. (ii) Give a reason for your answer in (b)(i) above. (c) Name the part labelled X.
answers
(a) Stem:
(b) (i) Monocotyledonae; (ii) Vascular bundles scattered/not arranged in a ring (c) Epidermis; K.C.S.E Biology Q & A - MODEL 2009PP2QN05
Name a support tissue in plants thickened with
(i) Cellulose (ii) Lignin
answers
(i) Collencyma
(ii) Xylem/ tracheid/ vessels/ schlerencyma
K.C.S.E Biology Q & A - MODEL 2009PP2QN05
what happens when a wilting young plants is well watered
answers
K.C.S.E Biology Q & A - MODEL 2009PP1QN29
Explain why the rate of transpiration is reduced when humidity is high
answers
State two ways in which aerenchyma tissues in aquatic plants are adapted to their function23/6/2020
K.C.S.E Biology Q & A - MODEL 2009PP1QN25
State two ways in which aerenchyma tissues in aquatic plants are adapted to their function
answers
K.C.S.E Biology Q & A - MODEL 2009PP1QN15
Name the type of movement that occurs within a plant cell
ANSWER
K.C.S.E Biology Q & A - MODEL 2009PP1QN14
Name a support tissue in plants that is not thickened with lignin
ANSWERS
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