Year :
2010
Title :
Biology
Exam :
JAMB Exam
Paper 1 | Objectives
41 - 49 of 49 Questions
| # | Question | Ans |
|---|---|---|
| 41. |
If both parents are heterozygous for a trait, the probability that an offspring will be recessive for that trait is? A. \(\frac{1}{2}\) B. \(\frac{3}{4}\) C. \(\frac{1}{4}\) D. 1 Detailed SolutionThe expected genotype ratio when two heterozygotes are crossed is 1 (homozygous dominant) : 2 (heterozygous) : 1 (homozygous recessive).There is an explanation video available below. |
|
| 42. |
 Use the diagram above to answer this question.In which plantation are all the trees between the height of 2-4m? A. lll B. ll C. l D. lV |
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| 43. |
 Use the diagram above to answer this question.Which of the following is a true feature of plantation ll? A. it has the highest number of trees of about 2m high. B. it has highest number of trees C. it has the highest number of tall trees D. the height of all its trees range between 2m and 6m |
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| 44. |
 Use the diagram above to answer this question.The movement of material in the xylem and phloem tissues of the plant are represented by the arrows labeled? A. lV and III respectively B. ll and l respectively C. l and ll respectively D. l and lll respectively Detailed Solutionxylem, plant vascular tissue that conveys water and dissolved minerals from the roots to the rest of the plant and also provides physical support.Phloem is a living tissue in vascular plants which conducts the soluble organic compounds synthesized during photosynthesis downwards from the leaves. There is an explanation video available below. |
|
| 45. |
 Use the diagram above to answer this question.During photosynthesis, the arrow labeled ll represents the? A. escape of mineral salts B. absorption of energy from the sun C. release of carbon (IV) oxide D. release of oxygen as a by-product |
|
| 46. |
 Use the diagram above to answer this question.The main function of the feathers covering the part labeled I is to? A. prevent ectoparasites from attacking the animal B. generate heat to keep the animal warm C. provide some power for flight D. serve as insulator to maintain body heat |
|
| 47. |
 Use the diagram above to answer this question based on the shape and structure of the beak and feet, the bird represented is likely to feed mainly on? A. flesh B. fruits C. seeds D. nectar |
|
| 48. |
 Use the diagram above to answer this question.With respect to their decreasing dependence on aquatic conditions for reproduction, which of the following is the correct arrangement of the animals represented? A. l,IV,II and lll B. IV, lll, ll and l C. l, ll, IV and lll D. lll, ll, IV and l Detailed Solution- Like frogs, most toads lay their fertilized eggs in water, where they hatch into tadpoles before developing into adult toads. These amphibians need a safe, undisturbed body of water to lay their eggs in. However, a few species breed on land.- the mother alligator typically lays about 35 eggs in a nest made of mud, sticks and other plant matter. - Rabbits sometimes dig a burrow in which to give birth There is an explanation video available below. |
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| 49. |
 In the diagram, which of the animals represents the oldest creatures in terms of evolutionary history? A. iii B. ii C. i D. iv Detailed SolutionEmbryos of vertebrates can be used to show evolutionary trend:- Fishes → Amphibians → Reptiles → Birds → Mammals There is an explanation video available below. |
| 41. |
If both parents are heterozygous for a trait, the probability that an offspring will be recessive for that trait is? A. \(\frac{1}{2}\) B. \(\frac{3}{4}\) C. \(\frac{1}{4}\) D. 1 Detailed SolutionThe expected genotype ratio when two heterozygotes are crossed is 1 (homozygous dominant) : 2 (heterozygous) : 1 (homozygous recessive).There is an explanation video available below. |
|
| 42. |
Use the diagram above to answer this question.In which plantation are all the trees between the height of 2-4m? A. lll B. ll C. l D. lV |
|
| 43. |
Use the diagram above to answer this question.Which of the following is a true feature of plantation ll? A. it has the highest number of trees of about 2m high. B. it has highest number of trees C. it has the highest number of tall trees D. the height of all its trees range between 2m and 6m |
|
| 44. |
Use the diagram above to answer this question.The movement of material in the xylem and phloem tissues of the plant are represented by the arrows labeled? A. lV and III respectively B. ll and l respectively C. l and ll respectively D. l and lll respectively Detailed Solutionxylem, plant vascular tissue that conveys water and dissolved minerals from the roots to the rest of the plant and also provides physical support.Phloem is a living tissue in vascular plants which conducts the soluble organic compounds synthesized during photosynthesis downwards from the leaves. There is an explanation video available below. |
|
| 45. |
Use the diagram above to answer this question.During photosynthesis, the arrow labeled ll represents the? A. escape of mineral salts B. absorption of energy from the sun C. release of carbon (IV) oxide D. release of oxygen as a by-product |
| 46. |
Use the diagram above to answer this question.The main function of the feathers covering the part labeled I is to? A. prevent ectoparasites from attacking the animal B. generate heat to keep the animal warm C. provide some power for flight D. serve as insulator to maintain body heat |
|
| 47. |
Use the diagram above to answer this question based on the shape and structure of the beak and feet, the bird represented is likely to feed mainly on? A. flesh B. fruits C. seeds D. nectar |
|
| 48. |
Use the diagram above to answer this question.With respect to their decreasing dependence on aquatic conditions for reproduction, which of the following is the correct arrangement of the animals represented? A. l,IV,II and lll B. IV, lll, ll and l C. l, ll, IV and lll D. lll, ll, IV and l Detailed Solution- Like frogs, most toads lay their fertilized eggs in water, where they hatch into tadpoles before developing into adult toads. These amphibians need a safe, undisturbed body of water to lay their eggs in. However, a few species breed on land.- the mother alligator typically lays about 35 eggs in a nest made of mud, sticks and other plant matter. - Rabbits sometimes dig a burrow in which to give birth There is an explanation video available below. |
|
| 49. |
In the diagram, which of the animals represents the oldest creatures in terms of evolutionary history? A. iii B. ii C. i D. iv Detailed SolutionEmbryos of vertebrates can be used to show evolutionary trend:- Fishes → Amphibians → Reptiles → Birds → Mammals There is an explanation video available below. |