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 is an example of an adaptation for survival in social insects?
Migration to warmer climates
Production of venom for defense
Formation of complex caste systems
Hibernation during winter months
Correct answer is C
Social insects, such as ants, bees, wasps, and termites, exhibit complex social structures and behaviors that contribute to their survival and success as a colony. ocial insects organize themselves into specialized groups or castes, each with specific roles and functions. These castes can include workers, soldiers, drones, and queens. This division of labor and specialization enhances the efficiency of tasks within the colony, promoting survival and reproductive success.
Which of the following is evidence of evolution?
All of the above
Similarities in embryonic development
Fossils of extinct organisms
Homologous structures in different species
Correct answer is A
All the options provided are evidence of evolution, which supports the idea that species have evolved and changed over time.
The membrane around the vacuole is known as
Elaioplast
Amyloplast
Tonoplast
Cytoplast
Correct answer is C
The membrane around the vacuole is known as Tonoplast. The tonoplast is the cytoplasmic membrane surrounding a vacuole, separating the vacuolar contents from the cell's cytoplasm. It is also known as Vacuolar membrane.
Which of the following is a characteristic of cells related to irritability?
Ability to respond to stimuli
Ability to synthesize proteins
Ability to generate energy
Ability to replicate DNA
Correct answer is A
Irritability, also known as responsiveness or excitability, refers to the ability of cells to detect and respond to various stimuli or changes in their environment.
Which of the following is an example of a microorganism in action as a disease vector?
Fungi decomposing dead plant material
Mosquito transmitting malaria
Bacteria causing food poisoning
Algae producing oxygen through photosynthesis
Correct answer is B
A disease vector is an organism that transmits disease-causing pathogens from one host to another. Female Anopheles mosquitoes can carry and transmit the Plasmodium parasite, which causes malaria. When an infected mosquito bites a person, it injects the parasite into the bloodstream, leading to the transmission of the disease.