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 mouthparts of a grasshopper are adapted for
sucking
chewing
grinding
absorption
Correct answer is B
Grasshoppers are herbivorous insects that primarily feed on plant material. Their mouthparts are well adapted for chewing, allowing them to consume various parts of plants, such as leaves, stems, and flowers.The mouthparts of a grasshopper consist of several structures that work together during feeding:
Mandibles, Maxillae and Labium and Labrum.
community
biosphere
niche
population
Correct answer is A
A community in ecology refers to a group of different species that inhabit the same geographic area and interact with one another. These species share a common habitat and are interconnected through various ecological relationships. In a community, the interactions between different species can be complex and can include competition, predation, mutualism, commensalism, and parasitism.
The diagram below is an illustration of a mango leaf drawn by a student in a Biology test. The student failed the test. Study it and answer the question.
which features of the diagram would have earned the student more marks if shown
colour and size
spelling the label and length of midrib
habitat and agricultural qualities of leaf
title and margin
Correct answer is D
No explanation has been provided for this answer.
The diagram below is an illustration of a mango leaf drawn by a student in a Biology test. The student failed the test. Study it and answer the question.
The likely reason why the student failed the test was that the
labels were wrong and the guidelines were not touching the structures
net venation shown were few, rough, not properly drawn and wrongly placed
leaf venation should have been parallel and the midrib should be thicker
leaf was too tapered at the apex, the leaf stalk was too short and the shape of leaf was wrong
Correct answer is A
The likely reason why the student failed the test was that the labels were wrong and the guidelines were not touching the structures
The structure that its action could result in choking when talking and eating at the same time is
oesophagus
epiglottis
oesophagus
liver
Correct answer is B
The structure that could result in choking when talking and eating at the same time is the epiglottis.
The epiglottis is a flap-like structure located at the base of the tongue, near the entrance of the windpipe (trachea). Its primary function is to prevent food and liquids from entering the trachea and lungs during swallowing. When you swallow, the epiglottis covers the opening of the trachea, directing food and liquids into the esophagus, which leads to the stomach. This prevents choking and aspiration of food into the respiratory system.
A sudden change in the genetic composition of an organism is termed
mutation
linkage
variation
epistasis
Correct answer is A
Mutation is the process by which there is a permanent alteration in the DNA sequence of an organism's genome. These changes can occur due to various factors such as exposure to radiation, chemicals, or errors during DNA replication. Mutations can happen in somatic cells, which affect only the individual, or in germ cells (egg or sperm cells), which can be passed on to offspring.
Paternity disputes could be resolved accurately through
finger printing
tongue rolling
DNA test
blood group
Correct answer is C
Paternity testing, also known as DNA testing for paternity, is a reliable and accurate method used to determine the biological father of a child. It is based on the analysis of DNA (deoxyribonucleic acid), which is the genetic material found in cells. Every individual inherits their DNA from their biological parents, half from the mother and half from the father.
The capturing and digestion of insects by a pitcher plant is a special form of nutrition that is
heterotrophic
saprophytic
chemosynthetic
autotrophic
Correct answer is A
Heterotrophic nutrition is a type of nutrition in which an organism obtains its food by consuming organic matter from other organisms. In the case of pitcher plants, they capture and digest insects as a source of nutrients to supplement their diet, especially in nutrient-poor environments. This carnivorous adaptation is a specialized form of heterotrophic nutrition, as the pitcher plant relies on consuming other living organisms (insects) to meet its nutritional needs. The pitcher plant is a carnivorous plant that has modified leaves forming pitcher-like structures.
The following activities are associated with termites except
nuptial flight
searching for food
communication
pollination
Correct answer is D
Pollination is not an activity associated with termites. Pollination is primarily carried out by various animals, such as bees, butterflies, birds, and bats, which transfer pollen from one flower to another, leading to fertilization and seed production. While some insects, like bees, are important pollinators, termites are not known for their role in pollination.
Use the information below to answer the question
I - making shoes from crocodile skin
II - making tables with plastic
III - using elephant tusk for decoration
IV - using firewood for cooking
encourage over-utilization of forest resources
enact and enforce laws towards conservation of resources
encourage indiscriminate killing of wildlife
promote felling of trees without planting new ones
Correct answer is B
In order to avoid some of the acts that would have negative effects on conservation. Government should enact and enforce laws towards conservation of resources
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