The scientist who introduced binomial nomenclature in the classification of organisms was A. Charles Darwin
B. Carolus Linnaeus
C. John Ray
D. Louis Pasteur
Which of the following statements is true about arthropods? A. Prothorax bears only legs
B. Mesothorax bears only legs
C. Metathorax bears only wings
D. Prothorax bears only wings
What level of organization is Spirogyra? A. System
B. Organ
C. Cell
D. Tissue
The streaming movement of cytoplasm within the Paramecium is known as A. Transpiration
B. Digestion
C. Cyclosis
D. Osmosis
Which of the following organelles is found only in plant cells? A. Mitochondria
B. Ribosomes
C. Lysosomes
D. Plastids
Active transport differs from diffusion in that active transport A. is a very fast process
B. allows the movement of substances against concentration gradient
C. takes place in both light and dark reactions of photosynthesis
D. occurs in both plant and animal tissues
The type of response demonstrated is A. phototropism
B. geotropism
C. hydrotropism
D. thigmotropism
The conclusion drawn from the experiment in the diagram above is that A. shoots of plants are negatively thigmotropic
B. shoots of plants are negatively geotropic
C. shoots of plants are positively phototropic
D. roots of plants are positively hydrotropic
The odontoid process is found on the A. axis vertebra
B. atlas vertebra
C. thoracic vertebra
D. sacral vertebra
A seedling was made to stand in a solution of red ink for three hours, and a transverse section of the stem was examined under the microscope. The process being investigated was A. the importance of microelements to plants
B. ascent of water through the xylem
C. diffusion of colored substances
D. distribution of food in plants
Which of the following structures would carry out cellular respiration? A. germinating seed
B. decolorized leaf
C. dry leaf
D. boiled cowpea
Which of the following substances is NOT an excretory product of animals? A. carbon dioxide
B. urea
C. sweat
D. oxygen
An example of homeostasis in living organisms is A. cooling effect resulting from evaporation of water from the body surface
B. root hairs of a plant growing towards the source of light
C. changing the body color of a chameleon to match the color of the foliage on which it is resting
D. the release of phosphorus into the phloem of a plant growing in a phosphorus-deficient soil
Ultra-filtration in the kidney takes place in the A. Renal vein
B. Medulla
C. Loop of Henle
D. Bowman’s Capsule
The thyroid gland is found at the base of the A. Midbrain
B. Kidney
C. Neck
D. Liver
Which of the following statements about the response of neurons to stimulus is correct? A. Neurons respond to stimuli of any strength
B. Neurons respond to all stimuli applied in rapid succession
C. Neurons respond more rapidly during the absolute refraction period
D. Intensity of stimulus must reach a threshold value before the neurons can be excited
Which of the following practices may lead to infection of the eye? Use of A. contact lenses
B. convex lenses
C. biconcave lenses
D. concave lenses
The structures for gaseous exchange in breathing roots are A. stomata
B. lenticels
C. cuticle
D. mitochondria
The adult fly in this cycle is called A. Housefly
B. Butterfly
C. Cockroach
D. Mosquito
The larva is also known as A. Nymph
B. Caterpillar
C. Maggot
D. Chrysalis
The source of energy required by plants during food production is A. Photosynthesis
B. Chlorophyll
C. Sunlight
D. Microorganisms
One major difference between plant and animal nutrition is the ability of plants to synthesize A. Food for plants and animals
B. Water for plants
C. Water for animals
D. Food for plants only
By what process is starch converted into maltose? A. Hydrolysis
B. Condensation
C. Translocation
D. Photosynthesis
The ascent of water in tall trees is mainly due to A. adhesive forces
B. transpiration pull
C. root pressure
D. cohesive forces
The duodenum of a person was surgically removed. Which of the following substances would have their digestion affected? A. starch and protein only
B. starch and lipids
C. starch, peptones and maltose
D. starch, protein and lipids
Which of the following dental formulae represents the dentition in rabbits? A. 1 2/1 C 0/0 P 3/2 M 3/3
B. 1 2/2 C 1/1 P 2/2 M 3/3
C. 1 1/2 C 0/0 P 2/3 M 3/3
D. 1 2/1 C 0/1 P 3/2 M 3/3
The property of soil demonstrated is A. particle size
B. capillarity
C. colour
D. texture
Which of the following statements would be a correct observation at the end of the experiment? Water moves A. highest in sandy soil
B. lowest in loamy soil
C. to the same level in all soil types
D. highest in clayey soil
The most important factor(s) that influence(s) the ecological niche of an organism is/are the A. water, light and predator-prey relationship
B. food and water availability
C. physical environment
D. competition for food and space
The diagram above is an illustration of organisms in an air-tight aquarium. The most important factor needed by the organisms is A. light energy
B. low humidity
C. oxygen
D. nitrate
Which of the following instruments is used to determine the turbidity of water? A. hygrometer
B. hydrometer
C. secchi disc
D. rain gauge
In an ecosystem, the least efficient energy transfer link is from the A. secondary consumers to decomposers
B. sun to producers
C. primary consumers to secondary consumers
D. producer to primary consumers
Xerophytes have the following characteristics aimed at conserving water except A. thick cuticle
B. broad leaf surfaces
C. sunken stomata
D. waxy cuticle
An association between living organisms in which one lives on and feeds at the expense of the other is known as A. commensalism
B. predation
C. parasitism
D. mutualism
When large numbers of organisms share limited space and resources, the immediate result is A. extinction
B. emigration
C. competition
D. immigration
Which of the following diseases is caused by a bacterium? A. ringworm
B. poliomyelitis
C. syphilis
D. malaria
Conservation of wildlife is necessary mainly because A. wild species cannot resist disease better than their domesticated species
B. many predator wild animals help in the control of pests
C. it prevents extinction of species
D. many people derive pleasure from observing wild animals
Patients X and Y were likely transfused with blood of genotype A. OO
B. AO
C. BO
D. AA
What should the hospital have done to prevent X from showing the symptom described above? Patient X should have A. undergone an agglutination test
B. been asked for the blood group
C. been screened for HIV
D. undergone malaria test
The greatest contribution to genetic studies was made by A. Gregor Mendel
B. Thomas Morgan
C. Charles Darwin
D. Robert Hooke
The exchange of genes between homologous chromosomes is called A. crossing over
B. back cross
C. test cross
D. mutation
Which of the offspring are all homozygous? A. P
B. Q
C. S
D. R
Genes that remain linked are those A. close to each other on the chromosomes
B. on the same locus on the chromosomes
C. on the homologous chromosomes
D. which are allelic pairs
A plant cell has 14 chromosomes prior to mitosis. What is the number of chromosomes in the daughter cells? A. 14
B. 56
C. 28
D. 7
The chemical bond that holds the bases of the two strands of DNA together is A. oxygen bond
B. hydrogen bond
C. electrovalent bond
D. covalent bond
The chemical bond that holds the bases of the two strands of DNA together is A. oxygen
B. hydrogen bond
C. electrovalent bond
D. covalent bond
Who proposed the theory in the illustration? A. Louis Pasteur
B. Gregor Mendel
C. Robert Hooke
D. Jean Lamarck
The theory supports A. natural selection
B. struggle for survival
C. independent assortment
D. the use and disuse of body parts
In evolution, fossils are naturally preserved in A. rocks
B. water
C. chemicals
D. trees
Which of the following is not a social insect? A. termite
