Study and practice Biology past questions with answers and detailed explanations. Then test your knowledge using our interactive CBT practice platform and prepare confidently for your upcoming examinations.
In natural selection, Darwin proposed that evolution occurred because of the following conditions except
Afood and other needs are abundant
Bthere is a fierce competition among the offsprings
CThat the weaker offsprings are eliminated
DThat nature selects those that will survive to reproduce their kind
View Explanation & Discuss
Question 2
waec2003
Which of the following is not a behavioural adaptation used by social animals?
ACryptic
BMimicry
CFlash
DSeason
View Explanation & Discuss
Question 3
waec2003
Sickle-cell anaemia has persisted in the human race due to
Alack of proper medical care for sicklers
Bcarriers being more resistant to malaria
Cmosquito vectors
Dwildlife intermediate hosts
View Explanation & Discuss
Question 4
waec2003
In Mendel's experiments, it was discovered that the skin of an African can be attributed to
Aa blending of black and white genes
Brecombination of genes
Closs of the epidermis
Dmutation in the skin cells
View Explanation & Discuss
Question 5
waec2003
In an experiment, a red-flowered plant was crossed with another red-flowered plant and the following results were obtained: 448 red flowers and 154 white flowers in the F1 generation.Which of the following represents the genotypes of the parents if R is for red gene and r for white gene?
ARR X Rr
BRR X rr
Crr x rr
DRr x Rr
View Explanation & Discuss
Question 6
waec2003
In an experiment, a red-flowered plant was crossed with another red-flowered plant and the following results were obtained: 448 red flowers and 154 white flowers in the F1 generation.
Which of the following represents the phenotypic ratio of the above genetic cross?
A1:2:1
B4:1
C3:1
D2:2
View Explanation & Discuss
Question 7
waec2003
The organic molecule (s) present in the nucleus is/are
ADNA
BProtein, RNA andDNA
CRNA and ATP
DRNA
View Explanation & Discuss
Question 8
waec2003
Which of following pairs of scientists discovered the Rhesus factor in human blood?
AHooke and Lavine
BDarwin and Landsteiner
CLandsteiner and Lavine
DHooke and Darwin
View Explanation & Discuss
Question 9
waec2003
Which of the following is an example of discontinuous variation?
Athe range in height of a pea plant from 30cm to 50cm
BOffspring, including the two male cats and three female cats
Cthe colour of pear plants grown in the dark
Dthe adult body weight ranging from 50 kg t0 95 kg
View Explanation & Discuss
Question 10
waec2003
Legumes incorporate nitrogen gas into their proteins because
Aof the presence of Azotobacter in their roots
Bthey possess root nodules containing Rhizobium
Cthey have a well developed root system
Dthey are autotrophic
View Explanation & Discuss
Question 11
waec2003
Forest conservation includes the following except
Aprevention of bush-fires
Bextensive felling of forest trees
Creplacing of harvested trees by planting seedlings
Dselective exploitation of forest trees
View Explanation & Discuss
Question 12
waec2003
Renewable resources are formed by
Aanimals that reproduce sexually
Borganisms confined to forest reserves
Corganisms that are constantly regenerating themselves
Dplants and animals that can reproduce sexually
View Explanation & Discuss
Question 13
waec2003
Viruses are pathogens of the following diseases except
Ameasles
Bsmallpox
Cpoliomyelitis
Dtuberculosis
View Explanation & Discuss
Question 14
waec2003
Rabbits cannot survive in an aquatic because they have
Afore-and hind-limbs
Bno gills
Cno fins
Dno scales
View Explanation & Discuss
Question 15
waec2003
Competition among individuals of a population increases the
Anumber of organisms
Bsurvival of the fittest
Cavailability of nutrient supplied
Denlargement of the territory
View Explanation & Discuss
Question 16
waec2003
Which of the following will have the least effect on the rate of change of the numbers in a population?
Afood supply
Bmutation
Cpredation
Ddisease
View Explanation & Discuss
Question 17
waec2003
Pneumatophores are essential for
Anutrition
Bmovement
Cbreathing
Dgrowth
View Explanation & Discuss
Question 18
waec2003
Fish cannot survive on land because it has
Aa body covered with scales
Ba streamlined body
Cno lungs
Dno walking appendages
View Explanation & Discuss
Question 19
waec2003
The gas produced during decomposition of matter is
Ahydrogen sulphide
Bcarbon monoxide
Cchlorine
Doxygen
View Explanation & Discuss
Question 20
waec2003
Which of the following environmental factors is not considered in a terrestial habitat?
