Which of the following eye defects can be corrected with a bi-focal lens?
- A. Astigmatism
- B. Cataract
- C. Hypermetropia
- D. Myopia
- E. Presbyopia
Soil factors in an ecosystems are referred to as
- A. biotic
- B. climatic
- C. edaphic
- D. physiographic
- E. topographic
Which of the following factors does NOT affect photosynthesis?
- A. carbon (iv) oxide
- B. light intensity
- C. relative humidity
- D. soil water
- E. temperature
An organism that transmits pathogens is called a
- A. prey
- B. commensal
- C. parasite
- D. symbiont
- E. vector
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
The glomerular filtrate contains the following substances EXCEPT
- A. blood cells
- B. glucose
- C. mineral salts
- D. Water
- E. urea
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
A feeding relationship in which both organisms benefit is referred to as
- A. commensalism
- B. parasitism
- C. predation
- D. saprophytism
- E. symbiosis
The following are classes of dry in-dehiscent fruits EXCEPT
- A. achene
- B. caryopsis
- C. cypsela
- D. follicle
- E. schizocarp
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
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
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
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
Plants that are found in extreme dry conditions are called
- A. epiphytes
- B. hydrophytes
- C. mesophytes
- D. thallophytes
- E. xerophytes
Simple sugars are also called
- A. cellulose
- B. disaccharides
- C. monosaccharides
- D. polysacchaiides
- E. starch
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
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
Xylem tissue consists of the following cells EXCEPT
- A. sieve tubes
- B. tracheids
- C. vessels
- D. fibres
- E. parenchyma
A typical lumbar vertebra does NOT have
- A. centrum
- B. neural arch
- C. neural spine
- D. neural canal
- E. vertebrartenal canal
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
The removal of undigested food substances from the body is called
- A. assimilation
- B. egestion
- C. excretion
- D. elimination
- E. ingestion