Biology
Paper 1 | Objectives | 40 Questions
JAMB Exam
Year: 2021
Level: SHS
Time:
Type: Question Paper
Answers provided
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Paper 1 | Objectives | 40 Questions
JAMB Exam
Year: 2021
Level: SHS
Time:
Type: Question Paper
Answers provided
No description provided
This paper is yet to be rated
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| # | Question | Ans |
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| 1. |
One of the functions of the xylem is? A. strengthening the stem B. manufacturing food C. reducing loss of water D. conducting manufactured food
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Detailed SolutionVascular tissue is comprised of the xylem and the phloem, the main transport systems of plants.xylem, plant vascular tissue that conveys water and dissolved minerals from the roots to the rest of the plant and also provides physical support. There is an explanation video available below. |
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| 2. |
Which of the statements below is not characteristic of wind-pollinated flowers? A. Stigmas are usually large and feathery B. Nectary is usually absent C. The pollen grains have rough spiny surfaces D. The flowers are not scented. |
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| 3. |
Some of the features of an animal are scales, teeth, nares, and backbone. The animal is likely to be a? A. toad B. bird C. lizard D. rat
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Detailed SolutionNB: Birds do not have teeth, although they may have ridges on their bills that help them grip food.Birds swallow their food whole, and their gizzard (a muscular part of their stomach) grinds up the food so they can digest it. There is an explanation video available below. |
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| 4. |
Choose the sequence which represents the correct order of organisms in a food chain A. Grass, snake, toad, grasshopper, hawk B. Grass, grasshopper, toad, snake, hawk C. Grass, grasshopper, snake, toad, hawk. D. Grass, snake, grasshopper, toad, hawk
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Detailed SolutionThe functional group in a food chain include:Primary producer → Primary consumer → Secondary consumer Grass, grasshopper, toad, snake, hawk There is an explanation video available below. |
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| 5. |
Flatworms and roundworms are said to be invertebrates because? A. they are small animals B. they can live inside the vertebrates C. some of them are unicellular D. they have no backbones
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Detailed Solution- The most familiar invertebrates include the Protozoa, Porifera, Coelenterata, Platyhelminthes, Nematoda, Annelida, Echinodermata, Mollusca and Arthropoda.- Invertebrates are animals that neither possess nor develop a vertebral column, derived from the notochord. There is an explanation video available below. |
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| 6. |
When a Spirogyra cell is immersed in a salt solution more concentrated than its cell sap, it? A. remains unchanged B. takes tip water and burst C. absorbs a little water D. loses water and shrivels
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Detailed SolutionExosmosis is the movement of water outside the cells when a cell is placed in a hypertonic solution.The cell becomes flaccid by the movement of water outside. There is an explanation video available below. |
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| 7. |
Which of the following is NOT regarded as a pollutant on land or in the air? A. Smoke B. Nitrogen C. Noise D. Sulphur dioxide
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Detailed SolutionAir PollutantsThe primary pollutants of concern in land and soil are heavy metals, such as lead, mercury and others, pesticides and other persistent organic pollutants, and pharmaceuticals, such as antibiotics used for livestock management. Nitrogen (N), nonmetallic element of Group 15 [Va] of the periodic table. It is a colourless, odourless, tasteless gas that is the most plentiful element in Earth's atmosphere and is a constituent of all living matter. There is an explanation video available below. |
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| 8. |
The initial volume of water poured into a bag of dry soil was 50ml and the amount that drained through was 35mI. The percentage water content of the fully soaked soil is therefore? A. 46.7 B. 25.0 C. 20.0 D. 30.0
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Detailed SolutionPercentage of water content (retained) = \(\frac{Water absorbed}{Weight of soil} * 100\)→ \(\frac{50 - 35}{50} * 100\) = 30% There is an explanation video available below. |
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