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K.C.S.E Biology Q & A - MODEL 2010PP1QN24
Why is Lamark’s theory not acceptable?
answer
K.C.S.E Biology Q & A - MODEL 2010PP1QN24
State two ideas proposed by Lamark in his theory of evolution.
answers
K.C.S.E Biology Q & A - MODEL 2010PP1QN23
Explain three ways in which red blood cells are adapted to their function.
answers
K.C.S.E Biology Q & A - MODEL 2010PP1QN22
What is the function of the following structures in the human reproductive organs?
(a) Fallopian tubes. (b) Epididymis. (c) Scrotal sac.
answers
(a) Passage of ova;
(b) Storage of sperms; (c) Hold the testis; K.C.S.E Biology Q & A - MODEL 2010PP1QN21
The diagram below represents part of the human skeleton.
(a) Name the part labelled P.
(b) (i) Name the bone that articulates with the part labelled Q. (ii) What type of joint is formed between the part labelled Q and the bone named in (b)(i) above? .
answers
(a) P sutures;
(b) (i) Atlas; (ii) Hinge joint;
K.C.S.E Biology Q & A - MODEL 2010PP1QN20
State two advantages of internal fertilization in humans.
answers
K.C.S.E Biology Q & A - MODEL 2010PP1QN19
State the changes that occur in arterioles in the human skin during thermoregulation.
answers
K.C.S.E Biology Q & A - MODEL 2010PP1QN18
Give two reasons why animals have specialised organs for excretion as compared to plants.
answers
K.C.S.E Biology Q & A - MODEL 2010PP1QN17
The following is the dental formula of a certain mammal:
(a) State the likely mode of feeding for the mammal.
(b) Give a reason for your answer in (a) above.
answers
(a) Herbivorous;
(b) Lack canines on upper Jaw/lack incisors on upper jaws;
K.C.S.E Biology Q & A - MODEL 2010PP1QN16
What is the role of bile salts in digestion in humans?
answers
K.C.S.E Biology Q & A - MODEL 2010PP1QN15
A potted plant was kept in the dark for 48 hours, Two leaves X and Y were treated as shown in the diagram below.
The experimental set-up was kept in sunlight for 6 hours after which a starch test was carried out on the two leaves. .
(a) What were the results of the starch test on leaves X and Y’? X Y (b) Give reasons for your answers in (a) above.
answers
a) X — Starch present;
Y-Starch absent; b) X - Acts as a control; Y - CO2 absent absorbed by potassium hydroxide pellets; Explain why it is not advisable to be in a poorly ventilated room with a burning charcoal stove.24/6/2020
K.C.S.E Biology Q & A - MODEL 2010PP1QN14
Explain why it is not advisable to be in a poorly ventilated room with a burning charcoal stove.
answer
K.C.S.E Biology Q & A - MODEL 2010PP1QN13
What is meant by the following terms?
(a) Habitat; (b) Ecosystem.
answers
(a) Place or environment in which specified organisms live;
(b) A natural unit with abiotic and biotic factors; K.C.S.E Biology Q & A - MODEL 2010PP1QN12
The diagram below illustrates the structure of bread mould.
(a) Name the part labelled J.
J K (b) State the functions of the structure labelled K.
answers
(a) J – sporangium
K-Rhizoids (b)- Absorption of soluble substances/ digested food - Secretion of digestive enzymes; - Anchorage(of mould on substrate); K.C.S.E Biology Q & A - MODEL 2010PP1QN11
The diagram below shows a transverse section of a leaf.
(a) Name the habitat of the plant from which the leaf was obtained.
(b) Give two reasons for your answer in (a) above.
answers
(a) Aquatic;
(b) Large air space/aerenchyma to enhance transpiration; Sclereids for mechanical support of leaf; Stomata on upper epidermis to enhance transpiration: |
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