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.
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.
Germination is the process in which a seed
Begins to photosynthesize
Develops into a mature plant
Absorbs nutrients from the soil
Breaks dormancy and starts to grow
Correct answer is D
Germination refers to the process by which a seed breaks dormancy and starts to grow into a new plant. Germination occurs when a seed is exposed to favorable environmental conditions, including proper moisture, oxygen availability, and suitable temperature.
Glaucoma
Myopia
Cataracts
Astigmatism
Correct answer is B
Myopia, also known as nearsightedness, is an eye defect characterized by the inability of the eye to focus light on the retina. Myopia is characterized by the ability to see nearby objects clearly while distant objects appear blurred. It occurs when the eyeball is elongated or the cornea is too curved, causing the incoming light to focus in front of the retina instead of directly on it.
Which of the following is the correct classification of carbohydrates?
Lipid
Phytonutrient
Macronutrient
Micronutrient
Correct answer is C
Carbohydrates are classified as macronutrients. Macronutrients like carbohydrates are a major source of energy in the diet and are classified as such.
Which of the following organs is primarily responsible for excretion in humans?
Liver
Pancreas
Kidneys
Lungs
Correct answer is C
The kidneys are primarily responsible for excretion in humans. The kidneys are the major excretory organs in humans. They filter waste products, excess ions, and water from the blood to produce urine, which is then eliminated from the body.
Metamorphosis is a biological process that involves
The growth and development of an organism from a zygote to an adult
The change in form and structure during the life cycle of certain organisms
The regeneration of lost body parts in an organism
The transformation of an organism from an adult stage to a larval stage
Correct answer is B
Metamorphosis is commonly observed in certain animal groups, such as insects (e.g., butterflies, beetles) and amphibians (e.g., frogs, salamanders). It involves a dramatic change in body form and structure as an organism progresses through distinct stages of its life cycle. These stages may include egg, larval, pupal, and adult phases.
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