Question 1 of 20 351 total questions
The process which reduces the nitrogen content of the soil is
A ammonification
B denitrification
C nitrogen fixation
D nitrification
E putrefaction
Dry, horny scales in reptiles help them to
A carryout gaseous exchange
B escape from predator
C facilitate movement
D look for mating partners
E prevent water loss.
Which of these statements best defines pyramid of energy?
A energy flow from one tropic level to another
B energy flow from one habitat to another
C the amount of energy in a given area
D the loss of energy from one organism to another
E the rate of energy flow in an area
Autotrophs include all the following EXCEPT
A chemosynthetic bacteria
B diatoms
C green plants
D phytoplankton
E zooplankton
An example of a carnivorous plant is
A cassytha
B lichen
C mucor
D mushroom
E sundew
The number of chromosomes in a gamete is represented by
Which of the following is NOT a type of exoskeleton?
A Cartilage
B Chitin
C Hoot
D Nail
E Shell
Which of the following enzymes requires acidic medium to function?
A Amylase
B Erepsin
C Maltose
D Pepsin
E Ptyalin
The following can increase crop production EXCEPT
A erosion control
B fertilizer application
C mechanization
D monocropping
E pest control
The tricuspid valve is located between the
A left auricle and left ventricle
B left and right auricles
C right and left ventricles
D right auricle and right ventricle
E right auricle and left ventricle
In terms of evolutionary trend, which of these invertebrates evolved first?
A Annelida
B Arthropoda
C Coelentrata
D Platyhelminthes
E Protozoa
Which of the following is NOT a type of finger print?
A arch
B compound
C loop
D simple
E whorl
Cotton is an example of a/an crop.
A fibre
B food
C latex
D oil
E cereal
Which of the following is NOT a transmissible character?
A dimple cheek
B ability to roll tongue
C colour blindness
D sickle-cell anaemia
E big muscles of a boxer
The function of the ribosomes is the
A absorption of carbon dioxide from the air
B control of all the vital activities of the cell
C provision of energy for cellular activities
D synthesis of secretory products
E synthesis of proteins and enzymes
All of these are vertebrates EXCEPT
A lizard
B rat
C starfish
D tilapia fish
E toad
In which of the following blood vessels does exchange of materials occur
A arteries
B arterioles
C capillaries
D venules
E veins
An ovary with ovules arranged along its walls is said to have ------------ placentation.
A axile
B central
C free central
D marginal
E parietal
Maximum and minimum thermometer is used for measuring
A atmospheric pressure
B highest and lowest amount of rainfall in habitat
C highest and lowest temperature of the day
D light intensity
E relative humidity
The enzyme ptyalin acts in the
A large intestine
B mouth
C oesophagus
D small intestine
E stomach
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