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22

An organism that transmits pathogens is called a

  • A. prey
  • B. commensal
  • C. parasite
  • D. symbiont
  • E. vector
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23

The mouth part of a mosquito through which it sucks the blood of its victim is called

  • A. hypopharynx
  • B. mandible
  • C. labium
  • D. labrum
  • E. stylet
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24

The glomerular filtrate contains the following substances EXCEPT

  • A. blood cells
  • B. glucose
  • C. mineral salts
  • D. Water
  • E. urea
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25

When a plant shows yellowing of leaves and stunted growth, the plant is deficient in

  • A. copper
  • B. iron
  • C. manganese
  • D. silicon
  • E. zinc
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26

A feeding relationship in which both organisms benefit is referred to as

  • A. commensalism
  • B. parasitism
  • C. predation
  • D. saprophytism
  • E. symbiosis
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27

The following are classes of dry in-dehiscent fruits EXCEPT

  • A. achene
  • B. caryopsis
  • C. cypsela
  • D. follicle
  • E. schizocarp
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28

The plant cell is different from an animal cell because it has

  • A. cellulose cell-wall
  • B. cytoplasmic content
  • C. centriole
  • D. mitochondria
  • E. nucleus
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29

The part of the kidney tubule where ultra filtration takes place is the

  • A. Bowman’s capsule
  • B. distal convoluted tubule
  • C. Henle’s loop
  • D. main collecting tubule
  • E. proximal convoluted tubule
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30

Which of the following is released from car exhaust due to incomplete combustion of fuel?

  • A. carbon dioxide
  • B. carbon monoxide
  • C. nitrogen dioxide
  • D. oxygen
  • E. sulphur dioxide
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31

Which of the following is NOT a characteristic of digestive enzymes?

  • A. changes in pH affect enzymes
  • B. enzymes react best at high temperature
  • C. enzymes react reversibly
  • D. they are affected by intake of poisons
  • E. they are protein in nature
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32

Plants that are found in extreme dry conditions are called

  • A. epiphytes
  • B. hydrophytes
  • C. mesophytes
  • D. thallophytes
  • E. xerophytes
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33

Simple sugars are also called

  • A. cellulose
  • B. disaccharides
  • C. monosaccharides
  • D. polysacchaiides
  • E. starch
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34

Which of these is NOT a method of improving crop yield?

  • A. spraying the crops with chemicals
  • B. mechanized farming
  • C. sowing pest resistant varieties of seeds
  • D. storing the crops in barns or silos
  • E. sowing of viable seeds
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35

The correct sequence of energy transfer among living organisms in an ecosystem is

  • A. consumers - decomposers – producers
  • B. consumers - producers - decomposers
  • C. decomposers - producers- consumers
  • D. producers - consumers- decomposers
  • E. producers - decomposers- consumers
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36

Xylem tissue consists of the following cells EXCEPT

  • A. sieve tubes
  • B. tracheids
  • C. vessels
  • D. fibres
  • E. parenchyma
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37

A typical lumbar vertebra does NOT have

  • A. centrum
  • B. neural arch
  • C. neural spine
  • D. neural canal
  • E. vertebrartenal canal
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38

The part of the skin which is excretory in function is the

  • A. adipose tissue
  • B. erector muscle
  • C. hair follicle
  • D. sebaceous gland
  • E. sweat gland
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39

The removal of undigested food substances from the body is called

  • A. assimilation
  • B. egestion
  • C. excretion
  • D. elimination
  • E. ingestion
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40

The tropical rainforest region is characterized by the following EXCEPT

  • A. abundant grasses
  • B. abundant rainfall
  • C. abundant trees and shrubs
  • D. high humidity
  • E. low temperature
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41

Reflex action is controlled by

  • A. cerebellum
  • B. cerebrum
  • C. medulla oblongata
  • D. olfactory lobe
  • E. pineal body
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42

The end product of glycolysis is

  • A. acetic acid
  • B. citric acid
  • C. ketoglutaric acid
  • D. oxaloacetic acid
  • E. pyruvic acid
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