How well do you understand living things and their vital processes? Whether you are preparing for JAMB, WAEC, NECO and Post-UTME, these Biology past questions and answers cover such subjects as the chemistry of life, botany, evolution, genetics, ecology etc to help you know what to expect, improve your speed and confidence and be really prepared for the actual aptitude test.
Which of the following processes is involved in the reproduction of developing organisms?
Budding
Germination
Fertilization
Pollination
Correct answer is C
Fertilization is the process by which the male and female gametes (reproductive cells) fuse to initiate the development of a new organism.
Which of the following is an example of an abiotic ecological factor?
Temperature
Competition
Predation
Symbiosis
Correct answer is A
Abiotic ecological factors are non-living factors that influence an ecosystem. They include physical and chemical factors such as temperature, sunlight, water availability, soil composition, and air quality.
Xylem
Epidermis
Parenchyma
Phloem
Correct answer is A
The tissue responsible for transporting water and minerals from the roots to the rest of the plant is called xylem. Xylem is a complex tissue composed of specialized cells, such as tracheids and vessel elements, which form long, interconnected tubes. These tubes facilitate the upward movement of water and minerals through the plant. Xylem also provides mechanical support to the plant.
Homozygous
Dominant
Heterozygous
Recessive
Correct answer is C
In monohybrid inheritance, the inheritance of a single gene is considered. An organism that carries two different alleles for a particular gene is referred to as heterozygous. The alleles may have different versions or variations of the gene. Heterozygous individuals carry two different alleles, with one being dominant and the other recessive.
Which gland is responsible for producing the hormone insulin?
Thyroid gland
Pituitary gland
Pancreas
Adrenal gland
Correct answer is C
The pancreas is an organ located in the abdomen, and it serves both digestive and endocrine functions. In terms of hormone production, the pancreas is responsible for producing insulin. Insulin plays a crucial role in regulating blood sugar levels by facilitating the uptake of glucose into cells.
Which of the following is the primary organ involved in gas exchange during respiration in humans?
Diaphragm
Bronchi
Lungs
Trachea
Correct answer is C
The primary organ involved in gas exchange during respiration in humans is the lungs. The lungs are a pair of respiratory organs located in the chest cavity. They are responsible for the exchange of oxygen and carbon dioxide between the air and the bloodstream.
Constructing dams for hydroelectric power
Introducing invasive species for pest control
Clear-cutting forests for timber extraction
Establishing marine protected areas
Correct answer is D
Ecological management and conservation involve strategies and practices aimed at preserving and protecting natural ecosystems and their biodiversity. Among the options provided, the establishment of marine protected areas is an example of such management and conservation through a biological association.
Which of the following are components of the skeletal system in humans?
Cartilage and blood vessels
Ligaments and tendons
Muscles and nerves
Bones and joints
Correct answer is D
The skeletal system in humans is composed of bones and joints. Bones and joints are the primary components of the human skeletal system.
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