​Identify the part of the light microscope which serve each of the functions described below9/9/2021
Identify the part of the light microscope which serve each of the functions described below
(i) Making rough focus (1mk)
Name the causative organism of the following diseases
(i) Malaria (1mk)
State the functions of the following parts of the human ear(a) Ossicles (1mk)
(b) Pinna (1mk)
Parts of a ear
Name the excretory products eliminated by the following animals(i) Tilapia (1mk)
Ammonia
(ii) Chicken (1mk)
Uric acid
State two functions of the spleen (2mks)
(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 Explain how the following occur during gene mutation(i) Substitution (2mks)
Replacement of a portion of the gene with new portion
(ii) Insertion (2mks)
the addition of an extra base onto an existing DNA 
(a) What biological process was being investigated in the experiment (1mk)Gas produced during anaerobic respiration (b)Write down a word equation that represents the reaction above (1mk)Glucose > Ethanol + Carbon (IV) oxide +Energy (c) In the above set up, why was it important to boil and cool glucose before adding yeast? (1mk)To remove O2; cooling to provide suitable temperature for enzymatic reactions/ avoid destroying/killing yeast Distinguish precisely between diabetes mellitus and diabetes insipidus (2mks)
The diagram above represents a pyramid of biomass derived from a certain ecosystem
(a) Suggest the type of ecosystem from which the pyramid was derived (1mk)Aquatic ecosystem (b)State the significance of short food chains in an ecosystem (1mk)The shorter the fluid chain, the more energy can be derived from it, hence the larger the population it can support The table below show the percentage composition of carbon (IV) oxide and oxygen inhales and exhales air.
The table above show the percentage composition of carbon (IV) oxide and oxygen inhales and exhales air
(a) Explain the differences in the percentage of the two gases in inhaled and exhaled air (2mks)O2 is used by body cells for respiration (b) Carbon (IV) oxide (2mks)CO2 is released by body cells during respiration A small boy remarked that his dog looks larger on cold days than on hot days. Give a biological explanation for this (2mks)
Name the organelle that is likely to be found in abundance in:(a) an enzyme secreting cell (1mk) ……………Golgi bodies (b) Cells producing lipid related secretions (1mk) …………………Smooth endoplasmic reticulum (c) Areas where the cells have raptured (1mk) ………………Lysosomes Give two destinations of food translocated from the leaves of plants. (2mks)
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