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 best describes physiological variation in biology?
Variations in the physiological processes and functions of organisms
Differences in physical characteristics and appearance within a population
Differences in behavior and social interactions among individuals
Variations in the genetic makeup of individuals within a species
Correct answer is A
Physiological variation in biology refers to the variations in the physiological processes and functions of organisms. Physiological variation encompasses the variations in the internal processes and functions of organisms, including metabolic processes, hormone regulation, immune responses, cellular functions, and physiological adaptations.
Which of the following statements best describes courtship behaviors in animals?
Courtship behaviors are solely performed by males to establish dominance within a social group
Courtship behaviors involve displays and rituals performed by both males and females to attract a mate
Courtship behaviors are primarily performed by females to attract males for mating
Courtship behaviors are aggressive interactions between males competing for a female mate
Correct answer is B
The statement that best describes courtship behaviors in animals is that they involve displays and rituals performed by both males and females to attract a mate. Courtship behaviors play a crucial role in mate selection and reproductive success in many animal species. They involve a variety of displays, rituals, vocalizations, dances, or other behaviors that serve to communicate sexual receptivity, readiness, and attractiveness.
Mesophyll
Xylem
Epidermis
Phloem
Correct answer is B
Xylem is the plant tissue responsible for transporting water and nutrients from the roots to the rest of the plant.
Which of the following is a method of asexual reproduction in plants?
Pollination
Vegetative propagation
Seed dispersal
Fertilization
Correct answer is B
Vegetative propagation is a method of asexual reproduction in plants. It refers to the production of new plants from vegetative structures, such as stems, leaves, or roots, without the involvement of seeds or spores. This method allows plants to produce genetically identical offspring to the parent plant.
Which of the following statements is true regarding sexual reproduction in organisms?
It involves the fusion of gametes from two parents, resulting in offspring with genetic variation
It involves the production of offspring through a single parent, resulting in genetically identical offspring
It is a form of asexual reproduction where offspring are produced without the involvement of gametes
It does not involve the formation of gametes or the fusion of reproductive cells
Correct answer is A
The statement that is true regarding sexual reproduction in organisms is that it involves the fusion of gametes from two parents, resulting in offspring with genetic variation. Sexual reproduction involves the production of haploid gametes (sperm and eggs) by two parents, which then fuse during fertilization to form a genetically diverse offspring.