Year :
2009
Title :
Biology
Exam :
JAMB Exam
Paper 1 | Objectives
21 - 30 of 50 Questions
| # | Question | Ans |
|---|---|---|
| 21. |
In fresh water marshes and swamps, the most important abiotic factors that organisms have to adapt to is? A. nature of substratum B. high salinity C. high temperature D. low pH Detailed Solutionthe most important abiotic factors that organisms have to adapt to are: low oxygen level and soft substratumThere is an explanation video available below. |
|
| 22. |
Which of the following biomass could be characterized by very low rainfall,cold nights, hot days, and fast blooming plants? A. northern guinea savanna B. sounthern guinea savanna C. tropical desert D. montane forest |
|
| 23. |
Mass of crucible = 10g A. 20% B. 25% C. 40% D. 60% |
|
| 24. |
I. Onchocerciasis A. I and II only B. II, III and IV C. I, II and III D. II and IV Detailed Solution- Onchocerciasis, also known as river blindness, is a disease caused by infection with the parasitic worm Onchocerca volvulus.Symptoms include severe itching, bumps under the skin, and blindness. The disease is spread by repeated bites from infected black flies and these can be found virtually anywhere there is flowing water to serve as habitat for larvae. - Schistosomiasis, also known as bilharzia, is a disease caused by parasitic worms. Infection occurs when your skin comes in contact with contaminated freshwater in which certain types of snails that carry schistosomes are living. - Salmonellosis is an infection with a bacteria called Salmonella, Salmonella live in the |
|
| 25. |
The major cause of global warming is the? A. burning of fossil fuel B. construction of dams C. use of electricity D. exploration of space Detailed SolutionAs greenhouse gas emissions blanket the Earth, they trap the sun’s heat. This leads to global warming and climate change.This global warming is caused by increased concentrations of greenhouse gases in the atmosphere, mainly from human activities such as burning fossil fuels, and farming. There is an explanation video available below. |
|
| 26. |
The uniqueness of an individual organism in a population is accounted for by? A. evolution B. variation C. adaptation D. mutation Detailed SolutionVariation is the differences between individuals within a species.This can be by: Inherited or acquired characteristics There is an explanation video available below. |
|
| 27. |
A phenotypic character with intermediate forms that can be graded from one extreme to the other is referred to as? A. discontinuous variation B. continuous variation C. a mutant D. a genome Detailed SolutionVariations can be:Discontinuous or discrete is either/or and is often caused by the presence or absence of a small number if genes. We can all either roll our tongue or not - there's nothing in between. Others are Eye colour, handedness & lobed/lobeless ears. Continuous or quantitative, smoothly grading between two extremes: Hand span, arm length & height. There is an explanation video available below. |
|
| 28. |
A farmer's assumption that the seed from a good harvest will produce a good yield is explained by the theory of A. evolution B. adaptation C. variation D. heredity |
|
| 29. |
The nephridia in the earthworm form part of the? A. reproductive system B. respiratory system C. circulatory system D. excretory system Detailed SolutionIn earthworms, members of the phylum Annelida, the excretory system consists of structural units called nephridia (the singular is nephridium).There is an explanation video available below. |
|
| 30. |
A woman with the ability to roll her tongue (Tt) marries a man who cannot roll his tongue(tt). what is the probability of each of their children being a tongue roller? A. 100% B. 75% C. 50% D. 25% |
| 21. |
In fresh water marshes and swamps, the most important abiotic factors that organisms have to adapt to is? A. nature of substratum B. high salinity C. high temperature D. low pH Detailed Solutionthe most important abiotic factors that organisms have to adapt to are: low oxygen level and soft substratumThere is an explanation video available below. |
|
| 22. |
Which of the following biomass could be characterized by very low rainfall,cold nights, hot days, and fast blooming plants? A. northern guinea savanna B. sounthern guinea savanna C. tropical desert D. montane forest |
|
| 23. |
Mass of crucible = 10g A. 20% B. 25% C. 40% D. 60% |
|
| 24. |
I. Onchocerciasis A. I and II only B. II, III and IV C. I, II and III D. II and IV Detailed Solution- Onchocerciasis, also known as river blindness, is a disease caused by infection with the parasitic worm Onchocerca volvulus.Symptoms include severe itching, bumps under the skin, and blindness. The disease is spread by repeated bites from infected black flies and these can be found virtually anywhere there is flowing water to serve as habitat for larvae. - Schistosomiasis, also known as bilharzia, is a disease caused by parasitic worms. Infection occurs when your skin comes in contact with contaminated freshwater in which certain types of snails that carry schistosomes are living. - Salmonellosis is an infection with a bacteria called Salmonella, Salmonella live in the |
|
| 25. |
The major cause of global warming is the? A. burning of fossil fuel B. construction of dams C. use of electricity D. exploration of space Detailed SolutionAs greenhouse gas emissions blanket the Earth, they trap the sun’s heat. This leads to global warming and climate change.This global warming is caused by increased concentrations of greenhouse gases in the atmosphere, mainly from human activities such as burning fossil fuels, and farming. There is an explanation video available below. |
| 26. |
The uniqueness of an individual organism in a population is accounted for by? A. evolution B. variation C. adaptation D. mutation Detailed SolutionVariation is the differences between individuals within a species.This can be by: Inherited or acquired characteristics There is an explanation video available below. |
|
| 27. |
A phenotypic character with intermediate forms that can be graded from one extreme to the other is referred to as? A. discontinuous variation B. continuous variation C. a mutant D. a genome Detailed SolutionVariations can be:Discontinuous or discrete is either/or and is often caused by the presence or absence of a small number if genes. We can all either roll our tongue or not - there's nothing in between. Others are Eye colour, handedness & lobed/lobeless ears. Continuous or quantitative, smoothly grading between two extremes: Hand span, arm length & height. There is an explanation video available below. |
|
| 28. |
A farmer's assumption that the seed from a good harvest will produce a good yield is explained by the theory of A. evolution B. adaptation C. variation D. heredity |
|
| 29. |
The nephridia in the earthworm form part of the? A. reproductive system B. respiratory system C. circulatory system D. excretory system Detailed SolutionIn earthworms, members of the phylum Annelida, the excretory system consists of structural units called nephridia (the singular is nephridium).There is an explanation video available below. |
|
| 30. |
A woman with the ability to roll her tongue (Tt) marries a man who cannot roll his tongue(tt). what is the probability of each of their children being a tongue roller? A. 100% B. 75% C. 50% D. 25% |