Biology 2019 Jamb Examination
Biology 2019 Jamb Examination
Question 1
Which of the following is a behavioural adaptation that protects prey from predators?
Secreting irritating fluids is a behavioural adaptation that helps prey protect themselves from predators by deterring them. Unlike physical adaptations, this behaviour directly influences predator-prey interactions and increases the chances of survival.
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Question 2
The period of inactivity seen in some animals during long period of heat or drought is
Aestivation is a state of prolonged dormancy during hot or dry periods. Animals reduce metabolic activity and avoid water loss to survive extreme conditions, similar to hibernation but in response to heat rather than cold.
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Question 3
The insect trapping movements of the leaves of the venus fly trap is a behavioural adaptation for
The Venus flytrap exhibits a behavioural adaptation by closing its leaves to trap insects. This provides additional nutrients, particularly nitrogen, supplementing its nutritional needs in nutrient-poor soils.
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Question 4
Animals are said to gregarious when
Gregarious animals are those that live or move in groups of the same species. This social behaviour increases protection against predators, facilitates communication, and improves chances for finding food and mates.
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Question 5
The type of nutrition shown by spirogyra is
Spirogyra is a green alga that performs photosynthesis to produce its own food from sunlight, water, and carbon dioxide. This is an example of holophytic (autotrophic) nutrition rather than consuming other organisms.
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Question 6
Raw materials required by green plants to manufacture their food are
Green plants require inorganic substances like water, carbon dioxide, and mineral salts to perform photosynthesis. These raw materials are converted into carbohydrates and other nutrients essential for growth and energy.
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Question 7
Which of the following pairs of organisms are photosynthetic?
Euglena and Chlamydomonas are unicellular organisms capable of photosynthesis. They contain chloroplasts with chlorophyll, which allow them to synthesize food from sunlight, unlike non-photosynthetic organisms listed in the other options.
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Question 8
The type of nutrition in which two organisms of different species live together and derive nutrients from each other is
Symbiotic nutrition involves a mutually beneficial relationship between two different species. Both organisms rely on each other for nutrients, protection, or other survival benefits, making it different from parasitism or autotrophic nutrition.
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Question 9
Which of the following statement about the similarities in plant and animal transport is correct?
Both plants and animals transport materials such as nutrients, water, and hormones in a fluid medium. In plants, this is in the xylem and phloem sap, while in animals it occurs in the blood, allowing efficient distribution to cells and tissues.
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Question 10
Which of the following describes the function of lymph
Lymph is a fluid in the lymphatic system that plays a crucial role in body defense. It transports white blood cells and antibodies, removes pathogens, and contributes to immune responses against infections.
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