The causative agent of Poliomyelitis is
- A. Virus
- B. Fungus
- C. Protozoan
- D. Bacterium
The soil with highest water-retaining capacity is
- A. Clayey Soil
- B. Stoney soil
- C. Sandy soil
- D. Loamy Soil
Which of the following is a nitrogen-fixing blue-green algae of soil?
- A. Rhizobium
- B. Nitrosomonas
- C. Clostridium
- D. Anabaena
A severe and long dry season is a characteristic feature of
- A. Sahel Savanna
- B. Mangrove Swamps
- C. Sudan Savanna
- D. Guinea Savanna
The study of how and why population size change over time is
- A. Population estimation
- B. Population dynamics
- C. Population ecology
- D. Population Cycle
A characteristic feature of tropical rainforest is that it
- A. Contains trees with narrow leaves
- B. Contains large number of plant species
- C. Contains fewer number of plant species
- D. Has total annual rainfall of less than 50cm
Which of the following group of organisms feeds directly on green plants?
- A. Primary Consumers
- B. Secondary Consumers
- C. Producers
- D. Decomposers
The major limiting factors of productivity in the aquatic habitat include the following except?
- A. Food
- B. Temperature
- C. Water
- D. Sunlight
The genetic make-up of an organism is described as
- A. Allele
- B. Chromosome
- C. Phenotype
- D. Genotype
The influence of soil on organisms in a habitat is referred to as
- A. Edaphic
- B. Physiographic
- C. Biotic
- D. Topographic
Which of the following instruments is used for measuring atmospheric pressure?
- A. Hydrometer
- B. Hygrometer
- C. Thermometer
- D. Barometer
The part of the brain responsible for peristalsis is the
- A. Olfactory Lobe
- B. Medulla Oblongata
- C. Hypothallamus
- D. Thalamus
The Cerebellum of the Brain controls
- A. Reflex Action
- B. Muscular Activity
- C. Emotional Expressions
- D. the Endocrine System
Coordination and regulation of body activities in mammals are achieved by the
- A. nerves and muscle
- B. nerves and hormones
- C. nerves only
- D. hormones only
Alternation of generation is a feature shown in
- A. mosses
- B. fungi
- C. grasses
- D. conifers
An example of an organ of perennation in plants is
- A. rhizome
- B. seed
- C. petal of a flower
- D. calyx of flower
Water in plants is removed as water vapour through the process of
- A. diffusion
- B. osmosis
- C. evaporation
- D. transpiration
The use of moist skin for respiration in amphibians is known as
- A. cellular respiration
- B. cutaneous respiration
- C. buccal respiration
- D. pulmonary respiration
The stomata of leaves are similar in function to the
- A. pharynx of humans
- B. scales of fish
- C. spiracle of insects
- D. trachea of toads
In vascular plants, the sieve tubes and companion cells are present in the
- A. cambium
- B. cortex
- C. xylem
- D. phloem
A circulatory system is very essential in mammals but not in smaller organisms like Amoeba because
- A. Amoeba lives in freshwater
- B. Diffusion is sufficient to transport materials in Amoeba
- C. Amoeba lacks blood containing haemoglobin
- D. Amoeba exibits anaerobic respiration