Biology 2020 Jamb Examination
Biology 2020 Jamb Examination
Question 11
What is the term used to describe biotic and abiotic factors in the environment of the organism?
An ecosystem comprises both biotic (living) and abiotic (non-living) components interacting in a specific environment. It includes plants, animals, microorganisms, climate, soil, water, and sunlight.
Not clear enough?
Question 12
Which of the following instruments is NOT used in measuring abiotic factors in any habitat?
Abiotic factors are physical and chemical elements of an environment. A microscope measures microscopic organisms, not abiotic factors. Thermometers, hygrometers, and windvanes directly measure temperature, humidity, and wind.
Not clear enough?
Question 13
The smallest living organism which share the characteristics of both living and non-living matter are
Viruses are unique because they exhibit characteristics of both living and non-living matter. They can reproduce only inside a host cell but remain inert outside a host, unlike fully living organisms.
Not clear enough?
Question 14
The process by which a red blood cell placed in distilled water absorbs water until it burst and realease it's content into the surrounding is known as
Hemolysis occurs when red blood cells absorb water via osmosis in a hypotonic solution, causing them to swell and burst. This releases hemoglobin and other cell contents into the surrounding fluid.
Not clear enough?
Question 15
Which of the following waste products in plants is excreted through the stomata and lenticles?
Carbon dioxide is a gaseous waste product produced during respiration. Plants excrete it through stomata and lenticels, allowing it to diffuse into the atmosphere while maintaining gas balance.
Not clear enough?
Question 16
Use the diagram to answer the question
The vertebra illustrated is
The thoracic vertebrae are located in the middle section of the vertebral column and articulate with ribs. Their structure supports the chest region and facilitates respiration.
Not clear enough?
Question 17
Use the diagram to answer the question
The neural arch is labelled
The neural arch forms the dorsal part of the vertebra, protecting the spinal cord. It consists of pedicles and laminae and provides attachment for muscles and ligaments, labeled here as ii.
Not clear enough?
Question 18
The excretory structure in the earthworm is the
Earthworms excrete metabolic wastes through nephridia. Each segment contains nephridia that filter coelomic fluid and blood, excreting nitrogenous wastes, maintaining osmotic balance, and supporting survival.
Not clear enough?
Question 19
In which of the following vertebrates does the skin function as a respiratory surface
Frogs are amphibians that perform cutaneous respiration. Their thin, moist skin allows gases to diffuse directly into and out of the bloodstream, supplementing lung-based respiration.
Not clear enough?
Question 20
The process of walking is under the control of the part of the brain called
The cerebellum coordinates voluntary movements such as walking. It integrates sensory input, maintains balance, and fine-tunes motor activity for smooth, precise motion.
Not clear enough?
You might like
A type of long-term loan granted to companies with fixed interest rate as well as with redeemable and irredeemable features is referred to as
You just installed a Pentium II 800-MHz chip, but the computer only recognizes it as a 400-MHz chip. What is the most likely problem?
Choose the option opposite in meaning to the kind-hearted phrase.
His kind-hearted master bought him a motorcycle?
An object of mass 20kg is released from a height of 10m above the ground level. The kinetic energy of the object just before it hits the ground is