The excretory product in protozoans is A. amino acid
B. uric acid
C. ammonia
D. urea
Which of the following is a living organism? A. Muscle
B. Nucleus
C. Yeast
D. Mitochondrion
Which of the following organisms is the most specialized? A. paramecium
B. Amoeba
C. Spirogyra
D. Rhizopus
Active transport can be defined as the movement of A. substances from a region of high concentration to a region of low concentration
B. substances from a region of low concentration to a region of high concentration across a living cell membrane
C. substances across a living cell membrane using energy from the cell
D. movement of molecules in a medium
Which of the following cell inclusions can destroy other cell organelles? A. Centriole
B. Ribosome
C. Lysosome
D. Mitochondrion
In which of the following yam tissues will osmosis occur? A. Boiled and peeled
B. Raw and peeled
C. Boiled and unpeeled
D. Roasted and peeled
The line XZ in the diagram below represents an actual distance of 10.0cm and the length of the diagram is 5.0cm. What is the magnification of the diagram? A. x 0.2
B. x 0.5
C. x 2.0
D. 50.0
The following events occur during mitosis in a cell: I. Chromatids separate; II. Chromosomes become visible; III. Chromosomes align at the equator IV. Cytoplasm divides (Cytokinesis): The correct sequence of the events is A. III, II, IV, I
B. II, III, I, IV
C. II, I, III, IV
D. II, IV, I, III
Which of the following statements about asexual reproduction is correct? It A. always involves one parent but the offspring is genetically different from the parent.
B. may involve two parents but the offspring is always identical to one parent
C. always involves one parent and the offspring is genetically identical to the parent
D. involves two parents but the offspring is not genetically identical to any of the parents
The bone illustrated above is the A. femur
B. humerus
C. radius
D. ulna
Which of the following processes is not a function of the mammalian skin? A. Regulation of body temperature
B. Reception of external stimuli
C. Excretion
D. Gaseous exchange
The legs of an accident victim with a fractured vertebral column and injured spinal cord could not be raised because A. impulses from receptors in the legs cannot travel to the brain
B. impulses from the brain cannot travel to the legs
C. chemical substances will be released at synapses in the central nervous system
D. reflex actions cannot take place in the legs
Which of the following conditions in flowering plants enhance self-pollination? A. Cleistogamy
B. Heterostyly
C. Protandry
D. Protogyny
The diagram above is an illustration of the left side of the human cerebrum. The part labeled X controls A. general memory
B. speech
C. sight
D. respiratory functions
The diagram above is an illustration of A. normal sight
B. short sightedness
C. correction of long sightedness
D. correction of short sightedness
The inability to maintain proper balance of the body in humans may be due to a defect in the A. cochlea
B. Eustachian tube
C. Semi-circular canals
D. oval window
The following substances pass into the blood of the fetus from the mother’s blood via the placenta except A. carbon dioxide
B. glucose
C. viruses
D. antibodies
An inferior ovary of a flower is situated A. below the floral parts
B. above the floral parts
C. at the same level with all the floral parts
D. at the center of the floral parts
Older parts of plant roots do not normally absorb water because A. they lack xylem
B. they have small surface area
C. the phloem is dead
D. they lack root hairs
The amount of starch in a germinating seed decreases because the starch is used up A. for respiration and building up of cells
B. to build cellulose cell wall
C. to develop meristematic tissues
D. for the production of enzymes
The purpose of treating poor soil with lime is to increase the quantity of A. nitrogen
B. phosphorus
C. carbohydrates
D. sulphur
A meal consisting of yam and a lot of vegetables is not balanced because it does not contain A. carbohydrates
B. proteins
C. vitamins
D. minerals
In a Biuret test, some protein was mixed with sodium hydroxide solution. Which of the following chemicals should be added to the mixture for a positive result? A. mercurous nitrate
B. copper sulphate
C. sodium carbonate
D. silver nitrate
A characteristic feature of plant parasites is the A. possession of holdfast
B. possession of rhizoids
C. development of hanging roots
D. development of haustoria
The part of a leguminous plant where bacteria like Azotobacter can be found is A. at the nodes of the stem
B. at the internodes
C. in the root nodules
D. in the spongy mesophyll
The following habitats can be found in West Africa except A. mangrove swamp
B. Sahel savanna
C. savanna grassland
D. temperate grassland
The following adaptations are associated with the flight of birds except A. reduced body weight
B. streamlined shape
C. presence of powerful muscles
D. clawed digits
The difference between a community and population is A. a community is made up of organisms of the same species while a population is made up of organisms of different species
B. a community is made up of populations of living organisms while a population is made up of organisms of the same species
C. an ecological niche does not exist in the community but it does in a population
D. a community attracts competition but a population does not
Which of the following statements about the circulation of water in nature is not correct? Water A. constantly evaporates from seas, rivers, lakes and soil
B. vapour rises, cools, condenses and precipitates as rain and dew
C. removed from ocean is permanently lost
D. is lost in plants by transpiration and decay
The instrument is A. an anemometer
B. a hygrometer
C. a barometer
D. a wind vane
The instrument is used to measure the A. direction of wind
B. speed of wind
C. air pressure in a habitat
D. turbidity of water
The following organisms are consumers except A. earthworm
B. spirogyra
C. bacteria
D. Rhizopus
Which of the following substances constitute domestic waste? A. I only
B. III only
C. IV only
D. II and V only
The atmosphere can be polluted by A. I only
B. III only
C. IV only
D. II and IV only
Which of the towns is likely to be discharging untreated sewage in their river? Town Oxygen level Green plants Fish A High Few Many B Low Many Many C High Few Few D Low Many Few
Which of the following natural resources is non-renewable? A. Water
B. Coal
C. Forest
D. Air
Which of the following statement is not a reason for banning bush burning? It A. allows for quick re-growth of grasses
B. kills soil microorganisms
C. leaves the soil bare of vegetation
D. burns off organic soil nutrients
Which of the following statements below explains why fertilizers are added to soils? A. Increasing the humus content of the soil
B. improving the water-retaining property of the soil
C. increasing the nutrient level of the soil
D. preventing soil erosion
Characteristics that exhibit continuous variation are generally controlled by A. a single gene
B. recessive genes
C. epistatic interactions
D. multiple genes
Differences in characteristics that exist among individuals of the same species is referred to as A. genetics
B. dominance
C. hybrid
D. variation
Which of the following traits is not a morphological variation in humans? A. Ability to taste PTC
B. Colour
C. Fingerprints
D. Size
Which of the following statements about chromosomes is correct? A. All the chromosomes of a species are the same in shape
B. The number of chromosomes present in a species is constant
C. They are neatly arranged in the cytoplasm
D. They bear ribosomes on their outer membranes
A small stem from a hibiscus plant was placed in a nutrient medium, and it developed into a new plant. The new plant was reproduced A. asexually with a different genotype from the parent plant
B. sexually with a different genotype from the parent plant
C. asexually with the same genotype as the parent plant
D. sexually with the same genotype as the parent plant
The F1 generation of a cross between a red cock and white hen were all red because the gene for the A. white colour did not segregate
B. red colour was dominant
C. white colour was dominant
D. red colour was recessive
Which of the following diseases can be inherited? A. pneumonia
B. AIDS
C. sickle cell anaemia
D. goitre
In dihybrid inheritance, Mendel considered A. a pair of contrasting characters
B. two pairs of contrasting characters
C. three pairs of contrasting characters
D. four pairs of contrasting characters
The main reason for nuptial flight in termites is to A. escape unfavourable conditions
B. search for food
C. form new colonies
D. communicate with one another
Which of the following organisms is not a social insect? A. Termites
B. Ants
C. Grasshoppers
D. Bees
Lamarck’s theory of evolution is based on the fact that A. organisms acquire genes from their parents
B. organisms pass on acquired characters to their offspring
C. characteristics of organisms are determined by the creator
D. characteristics of organisms are the sum of their parents’ characters
