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 options best describes adaptation for survival in organisms?
Adaptation is the inherited trait that increases an organism's chances of survival and reproduction in its environment
Adaptation is the process by which organisms acquire new characteristics during their lifetime
Adaptation refers to the ability of an organism to change its environment to better suit its needs
Adaptation involves the development of new traits in response to changes in the environment
Correct answer is A
The statement that best describes adaptation for survival in organisms is that it is the inherited trait that increases an organism's chances of survival and reproduction in its environment. It refers to the process by which populations of organisms evolve and become better suited to their environment over time.
Ecological succession refers to
The movement of organisms from one habitat to another
The competition among species for limited resources
The process of natural selection in a population
The gradual and predictable change in a community over time
Correct answer is D
Ecological succession can be primary or secondary. Primary succession occurs in areas where no previous community existed, such as on bare rock or after a volcanic eruption. Secondary succession occurs in areas where a previous community has been disturbed, such as after a forest fire or human disturbance. Throughout the succession process, the community gradually changes in terms of species composition, population sizes, and community interactions, leading to a more stable and mature ecosystem.
What is the primary function of the liver in the human body?
Regulation of body temperature
Regulation of blood pressure
Production of hormones
Detoxification and metabolism of nutrients and drugs
Correct answer is D
The liver is a vital organ in the human body with multiple functions, but its primary function is the detoxification and metabolism of nutrients and drugs. The liver plays a crucial role in various metabolic processes. It detoxifies harmful substances, such as drugs and toxins, by breaking them down into less harmful forms that can be eliminated from the body.
Which of the following statements is true regarding the urinary tubule in the excretory system?
The urinary tubule is responsible for the production of urine
The urinary tubule regulates the water and electrolyte balance in the body
The urinary tubule connects the kidneys to the bladder
The urinary tubule is the site of filtration of blood
Correct answer is A
The urinary tubule, a part of the nephron in the kidney, is indeed responsible for the production of urine. It does this by reabsorbing useful substances from the filtrate, such as glucose and ions, and secreting waste products into it. The modified filtrate, now called urine, is then passed on to the bladder for storage and eventual excretion.
Which of the following statements is true regarding cell growth?
Cell growth is solely influenced by external factors
Cell growth is a continuous process throughout the life of a cell
Cell growth involves an increase in the number of organelles within a cell
Cell growth occurs by cell division
Correct answer is D
Cell growth refers to an increase in cell size or mass over time. Cell growth occurs by cell division, as cells undergo division to increase their numbers and contribute to overall growth in tissues and organisms.