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.
The mutation theory of organic evolution was propounded by
Gregor Mendel
Hugo de Vries
Jean Lamarck
Charles Darwin
Correct answer is B
Gregor Mendel, through his work on pea plants, discovered the fundamental laws of inheritance.
Hugo de Vries (1901) put forward a theory of evolution, called mutation theory.
Jean Baptiste Lamarck believed that traits changed or acquired over an individual's lifetime could be passed down to its offspring.
The Theory of Evolution by natural selection was first formulated in Charles Darwin's book "On the Origin of Species" published in 1859.
The movement of part of a plant in response to external stimulus of no particular direction is
taxism
tropism
haptotropic movement
nastic movement
Correct answer is D
Taxism: oriented movement of a motile organism in response to an external stimulus, as toward or away from light.
A tropism is a biological phenomenon, indicating growth or turning movement of a biological organism, usually a plant, in response to an environmental stimulus.
In tropisms, this response is dependent on the direction of the stimulus.
The movement or directional growth of plants or plant organs (as the tendrils of climbing plants) in response to the stimulus of touch.
The non-directional movement (of plants) in response to a stimulus (e.g. humidity, temperature, light irradiance, nutrients, gravity, etc.
The most abundant group of organisms in the animal kingdom is
Mammalia
Aves
Insecta
Annelida
Correct answer is C
The phylum Arthropoda is the largest in the animal kingdom, having its class Insecta as 70% of all known species of animals.
Which of the following is true in blood transfusion?
A person of blood group AB can donate blood only to another person of blood group AB
Persons of blood groups A and B can donate or receive blood from each other
A person of blood group AB can receive blood only from persons of blood group A or B
A person of blood group O can donate only to a person of blood group O
Correct answer is A
People with type AB+ blood are universal recipients because they have no antibodies to A, B or Rh in their blood and can receive red blood cells from a donor of any blood type.
Donors with blood type AB can donate to recipients with blood type AB only.
The correct sequence of the movement of urea during urine formation is
glomerulus → Bowman's capsule → convoluted tubule → Henle's loop → collecting tubule
glomerulus → Bowman's capsule → convoluted tubule → Henle's loop → convoluted tubule → collecting tubule
convoluted tubule → glomerulus → Nettle's loop → Bowman's capsule→collecting tubule
convoluted tubule → Bowman's capsule → Henle's loop → glomerulus → collecting tubule
Correct answer is A
The kidneys filter unwanted substances from the blood and produce urine to excrete them.
There are three main steps of urine formation: glomerular filtration, reabsorption, and tubular secretion.
These processes ensure that only waste and excess water are removed from the body.