(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
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The table below 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)
(i) State the phenomenon shown above (1mk)Crossing over (ii) What is the genetic significance of the phenomenon above? (2mks)Variations; which may lead to new genetic fruits either advantages or disadvantages to the organism/may lead to evolution
Most terrestrial plants do not grow well in waterlogged soils. Give a reason for this (1mk)Lack of O2for respiration State the functions of the following parts of a nephron:(i) Loop of Henle (1mk)Reabsorption of H2O from the collecting duct (ii) Distal convoluted tubule (1mk)
Secretion of some drugs
The nephron is the minute or microscopic structural and functional unit of the kidney. It is composed of a renal corpuscle and a renal tubule. The renal corpuscle consists of a tuft of capillaries called a glomerulus and a cup-shaped structure called Bowman's capsule.
Insect’s blood is noted to lack a respiratory pigment. Explain (1mk)Insects blood is not used for transportation of respiratory gases
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