​List three characteristics that distinguish arthropods from organisms in kingdom Monera1/11/2021 List three characteristics that distinguish arthropods from organisms in kingdom Monera (3mks)
![]() The graph below is of sewage on the population of a species of bacteria in a certain river11/9/2021 (a) Account for the charges in population of bacteria between 2 and 10 kilometers down the river (2mks)
Distinguish between interspecific and intra-specific competition (2mks)
![]() ​State the characteristics that distinguish the following organisms into their respective classes9/9/2021
State the characteristics that distinguish the following organisms into their respective classes (3mks)
Millipedes, spider and tsetse fly
![]() CLASSIFICATION 1. 1995 Q3 P1 State two ways in which some fungi are harmful to man (2 marks) 2. 1995 Q6 P1 The diagram below represents a fern Name (a) The parts labelled A and B ( 2 marks) (b) The division to which the plant belongs ( 1 mark) ![]()
K.C.S.E Biology Q & A - MODEL 2019PP1QN21
Make a diagram of a simple, bibbed leaf with a serrated margin.![]()
K.C.S.E Biology Q & A - MODEL 2019PP1QN02
Explain why the bat is classified as a mammal yet it flies.
answers
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K.C.S.E Biology Q & A - MODEL 2019PP1QN02
Besides venation, state two other external characteristics of leaves that can be used to classify plants.
answers
(a) shape of the leaf blade/lamina(broadness or narrowness); leaf margin(smooth or serrated); leaf apex(pinnate dot rounded);leaf arrangement; leaf colour ; (leaf texture(smooth or rough); leaf type(simple or compound)leaf sheath/petiole(absence or presence)
(b) has mammary gland; body covered with fur/hair; gives birth/does not lay eggs; has external ears/pinnae; has seven cervical vertebrae; has sweat glands; heterodonts/four types of teeth ![]() K.C.S.E Biology Q & A - MODEL 2019PP1QN01
Name the characteristic of living organisms illustrated by each of the activities described below:
(a) Dressing heavily (b) Bursting of the sporangium in the Rhizopus sp
answers
![]() K.C.S.E Biology Q & A - MODEL 2018PP2QN05
The photograph below represents a plant in a Certain Division
​(a) (i) Name the Division to which the plant belongs.
(ii) With reference to the Photograph, state three observable features of the Division named in a(i) above. (b) Name the part labelled N and P. N P (c) Explain how the part labelled Q is adapted to its function
answers
​a) i. Bryophyta;
ii. Has capsules (for enclosing spores); Has (long) setae (for supporting the capsules/for effective propagation of spores); (Developed) rhizoids (for anchorage/absorption of water/mineral salts); Thalloid in nature/Thallus/undifferentiated; b) N — Capsule; P—Seta; (c)Numerous/hair-like to increase the surface area for absorption;/to enhance rate of absorption of water/nutrients/dissolved mineral salts; Numerous/hair-like to hold firmly on the surface/not to be easily blown away/displaced/anchorage; ![]()
K.C.S.E Biology Q & A - MODEL 2018PP1QN02
State two observable features that place a millipede into its Class.
answers
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K.C.S.E Biology Q & A - MODEL 2016PP1QN22
State three characteristics of the class Crustacea.
answers
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K.C.S.E Biology Q & A - MODEL 2016PP1QN03
State the important of tactic response among some members of the kingdom protista.
answer
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K.C.S.E Biology Q & A - MODEL 2015PP1QN16
State four structural differences between millipedes and centipedes.
answers
Millipedes Centipedes
Cylindrical body Dorso - ventrally flattened Head has two clumps of many simple eyes Head has a pair of simple eyes Each segment has two pairs of walking Each segment has a pair of waking legs legs (except the first thoracic segment) Head has a pair of short antennae; Head has a pair of long antennae. No poison claws Has poison claws Three body parts - head short, throrax, Two body parts - head and trunk and trunk Has anterior genital aperture Has aposterior genital aperture Has 9 - 100 segments Has 15 - 21 segments ![]()
K.C.S.E Biology Q & A - MODEL 2015PP1QN05
How is the low power objective lens manipulated to focus a specimen for observation under a light microscope?
answers
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K.C.S.E Biology Q & A - MODEL 2015PP1QN05
State two advantages of using a coverslip when preparing a specimen for observation under a light microscope.
answers
​(i) To hold the specimen in place;
(ii) Protects specimen from dehydration/drying up/dust particles; (iii)Protect objective lens from staining. ![]() |
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