Biology 2014 Jamb Examination
Biology 2014 Jamb Examination
Question 41
i2/1, c0/0, pm3/2, m3/3. The general formula above represent that of
The dental formula i2/1, c0/0, pm3/2, m3/3 corresponds to a herbivore. Herbivores have well-developed incisors and premolars for cutting and grinding plant materials, and typically lack prominent canines.
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Question 42
A circulatory system is very essential in mammals but not in smaller organisms like Amoeba because
In unicellular organisms like Amoeba, diffusion across the cell membrane is sufficient for the transport of gases and nutrients, so a circulatory system is unnecessary.
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Question 43
In vascular plants, the sieve tubes and companion cells are present in the
Sieve tubes and companion cells are components of the phloem, responsible for the transport of organic nutrients, especially sugars, throughout the plant.
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Question 44
The stomata of leaves are similar in function to the
Stomata allow gas exchange in plants, similar to spiracles in insects, which permit the passage of oxygen and carbon dioxide.
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Question 45
Which of the following is the most complex according to their cellular level of organization?
The heart is an organ composed of multiple tissues working together, making it more complex than single cells or simple multicellular organisms like Hydra.
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Question 46
Which of the following organisms is multicellular?
Spirogyra is a multicellular green alga, composed of filaments of cells, unlike the other options which are unicellular.
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Question 47
In bryophytes, sex organs are produced in the
In bryophytes, the gametophyte is the dominant generation and produces the sex organs (antheridia and archegonia) for reproduction.
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Question 48
Seed plants are the most dominant vegetation on land because of
Seed plants dominate because their seeds allow for efficient dispersal, survival under adverse conditions, and protection of the embryo, giving them a reproductive advantage.
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Question 49
In a Biuret test, some protein was mixed with sodium hydroxide solution. Which of the following chemicals should be added to the mixture for a positive result?
Copper sulfate reacts with peptide bonds in proteins under alkaline conditions (provided by sodium hydroxide) to give a violet or purple color, indicating a positive Biuret test.
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| Receipts and Payments Account | # | ||
|---|---|---|---|
| Balance b/d | ? | Rent and rates | 30 000 |
| Subscriptions received | ? | General expenses | 10 000 |
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| Insurance | 150 000 | ||
| Balance c/d | ? |
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