Question 1 of 20 53 total questions
Which of the following are not causative organisms of plant diseases?
A Fungi
B Viruses
C Bacteria
D Nematodes
E Cercariae
The causative organism of sleeping sickness is the?
A Trypanosome
B Plasmodium
C Vibrio bacterium
D penicillin
E tsetse fly
Which of the following statements is not true of a climax vegetation? It
A is an ecological phenomenon
B is a stable community
C eliminates competition
D results from succession
E involves the colonization of a habitat
Terrestrial organisms which are capable of maintaining their body temperature constant within fairly close
A thermoclines
B homotherms
C poikilotherms
D eurytherms
E stenotherms
Which of the following factors is not associated with aquatic habitat?
A Temperature
B Light intensity
C Humidity
D Turbidity
E Wave action
Which of the following is not a characteristic feature of tropical rain-forest habitat?
A Trees with longer boles than those in Savannah
B Fewer canopy strata than the savannah
C Many more trees and climbers than savannah
D Plenty of leaf litter on the ground
E More diverse communities than the savannah
Which of the following does not contribute to the biomass in an ecosystem?
A Producers
B Food chains
C Consumers
D Micro-organisms
E Saprophytes
Which of the following is not classified as a terrestrial habitat?
A Forest
B Guinea Savannah
C Afro Alpine
D Littoral zone
E Desert
Autotropic nutrition may be defined in terms of food obtained
A from other organisms in exchange for some products.
B by the breakdown of complex substances
C by an organism utilizing its own store of energy
D by synthesizing simple substances using energy from an external source
E in a synthesized form from other living organism.
The relationship between a herbivore and the bacteria which live in its caecum is known as
A parasitism
B symbiosis
C commensalism
D saprophytism
E predation
In a water culture experiment a plant showed poor growth and yellowing of the leaves. These symptoms
A calcium
B phosphorus
C iron
D zinc
E copper
Which of the following is not regarded as a micro-nutrient or trace element for plant growth?
A Phosphorus
B Zinc
C Boron
D Silicon
E Molybdenum
Even though some flowering plants contain accessory pigments which give them colours they still contain
A melanin
B chlorophyll
C xanthrophyll
D carotene
E chlorocruorin.
Which of the following does not occur during photosynthesis?
A Energy from sunlight is absorbed
B Carbondioxide is evolved
C Glucose is synthesized
D Oxygen is given
E water is split
Which structure in the maize grain stores food?
A Radicle
B Embryo
C Cytoplasm
D Seed coat
E Endosperm.
Which of the following is not correct about a fruit? lt
A may contain many seeds
B is a mature ovary
C is covered by the pericarp
D may develop from the receptacle
E possesses only one scar.
Which of the following specialized structures are stimulated by touch, pressure, pain, heat and cold?
A Receptors
B Synapse
C Cell bodies
D Myelin sheath
E Relay neurones
The brain and the spinal cord make up the
A pheripheral nervous system
B automatic nervous system
C central nervous system
D somatic nervous system
E sympathetic nervous system
Auxins are produced in the
A petiole of leaves
B parenchyma of roots and shoots
C epidermis of roots and shoots
D apical regions of roots and shoots
E sclerenchyma tissues of roots and shoots
The pituitary is called 'master gland' because
A it is locatd in the brain
B its secretion are the more numerous than those of the other gland
C its secretion controls the other glands
D it is the only organ that produces hormone
E it regulates muscular movements
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