Year :
2020
Title :
Biology
Exam :
JAMB Exam
Paper 1 | Objectives
21 - 30 of 40 Questions
| # | Question | Ans |
|---|---|---|
| 21. |
The ability of the eyes to focus on both near and distance objects is termed A. image formation B. refraction C. hypermetropia D. accommodation Detailed SolutionThe ability of the eye to focus distant as well as nearby objects clearly on the retina of the eye is called accommodation. When our eyes see distant objects then the ciliary muscles relax and the focal length is maximum in this position.There is an explanation video available below. |
|
| 22. |
A group of organism of different species living in a particular area is described as a A. colony B. community C. population D. niche Detailed SolutionA community is formed by populations of different species living together and interacting with each other. A community forms an ecosystem by its interaction with the abiotic environment.There is an explanation video available below. |
|
| 23. |
The biological association that contributes directly to succession in a community is A. competition B. predation C. parasitism D. commensalism Detailed Solutioncompetition between species in a particular habitat is a biotic factor of ecological primary succession.There is an explanation video available below. |
|
| 24. |
Floating microscopic heterotrophs are mostly grouped as A. phytoplankton B. zooplankton C. microbes D. nekton Detailed SolutionPhytoplankton are microscopic marine organisms that sit at the bottom of the food chain, most phytoplankton are buoyant and float in the upper part of the ocean. However, they are not heterotrophic like the zooplanktons.microbes are living organisms around us that we can't see with our naked eyes. nektons are organisms that are able to swim and move independently of current. There is an explanation video available below. |
|
| 25. |
Vaccination is carried out in order to A. check the production of poison B. increase the activities of white blood cells C. increase the number of red blood cells D. stimulate the production of anti-bodies |
|
| 26. |
For growth to occur in organisms, the rate of A. anabolism must exceed that of catabolism B. catabolism must exceed that of anabolism C. food storage must be low D. food storage must be high Detailed SolutionAnabolism centers around growth and building the organization of molecules. In this process, small, simple molecules are built up into larger, more complex ones while Catabolism is what happens when you digest food and the molecules break down in the body for use as energy.There is an explanation video available below. |
|
| 27. |
The probability of a baby being a boy or a girl depends on the contribution of the A. father's sex cells B. father's stomatic chromosome C. mother's sex cell D. mother's X-chromosome |
|
| 28. |
Both recesssive and dominant characters are found A. on different chromosome in the cell B. at the same logus of a homologous chromosome C. at a different loci of a homologous chromosome D. on the same chromatid in a chromosome |
|
| 29. |
In a population of living things, the parameters of size, height, weight and colours are examples of A. continuous variation B. non-heritable variation C. discontinuous variation D. physiological variation |
|
| 30. |
 Use the diagram to answer the question.The process of water loss and intake indicated by the arrows labelled i and ii are respectively A. evaporation and osmosis B. osmosis and exhalation C. osmosis and diffusion D. urination and diffusion |
| 21. |
The ability of the eyes to focus on both near and distance objects is termed A. image formation B. refraction C. hypermetropia D. accommodation Detailed SolutionThe ability of the eye to focus distant as well as nearby objects clearly on the retina of the eye is called accommodation. When our eyes see distant objects then the ciliary muscles relax and the focal length is maximum in this position.There is an explanation video available below. |
|
| 22. |
A group of organism of different species living in a particular area is described as a A. colony B. community C. population D. niche Detailed SolutionA community is formed by populations of different species living together and interacting with each other. A community forms an ecosystem by its interaction with the abiotic environment.There is an explanation video available below. |
|
| 23. |
The biological association that contributes directly to succession in a community is A. competition B. predation C. parasitism D. commensalism Detailed Solutioncompetition between species in a particular habitat is a biotic factor of ecological primary succession.There is an explanation video available below. |
|
| 24. |
Floating microscopic heterotrophs are mostly grouped as A. phytoplankton B. zooplankton C. microbes D. nekton Detailed SolutionPhytoplankton are microscopic marine organisms that sit at the bottom of the food chain, most phytoplankton are buoyant and float in the upper part of the ocean. However, they are not heterotrophic like the zooplanktons.microbes are living organisms around us that we can't see with our naked eyes. nektons are organisms that are able to swim and move independently of current. There is an explanation video available below. |
|
| 25. |
Vaccination is carried out in order to A. check the production of poison B. increase the activities of white blood cells C. increase the number of red blood cells D. stimulate the production of anti-bodies |
| 26. |
For growth to occur in organisms, the rate of A. anabolism must exceed that of catabolism B. catabolism must exceed that of anabolism C. food storage must be low D. food storage must be high Detailed SolutionAnabolism centers around growth and building the organization of molecules. In this process, small, simple molecules are built up into larger, more complex ones while Catabolism is what happens when you digest food and the molecules break down in the body for use as energy.There is an explanation video available below. |
|
| 27. |
The probability of a baby being a boy or a girl depends on the contribution of the A. father's sex cells B. father's stomatic chromosome C. mother's sex cell D. mother's X-chromosome |
|
| 28. |
Both recesssive and dominant characters are found A. on different chromosome in the cell B. at the same logus of a homologous chromosome C. at a different loci of a homologous chromosome D. on the same chromatid in a chromosome |
|
| 29. |
In a population of living things, the parameters of size, height, weight and colours are examples of A. continuous variation B. non-heritable variation C. discontinuous variation D. physiological variation |
|
| 30. |
Use the diagram to answer the question.The process of water loss and intake indicated by the arrows labelled i and ii are respectively A. evaporation and osmosis B. osmosis and exhalation C. osmosis and diffusion D. urination and diffusion |