Biology 2017 Jamb Examination
Biology 2017 Jamb Examination
Question 1
The appendicular skeleton is made up of the
The appendicular skeleton consists of the limbs and the girdles (pectoral and pelvic) that attach the limbs to the axial skeleton. It includes bones of the arms, legs, shoulders, and hips.
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Question 2
Which of the following factors can reduce the population of a community?
Predation reduces the population size by removing individuals from the prey population. Unlike immigration or mutualistic interactions, predation has a direct negative effect, influencing population dynamics and ecological balance.
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Question 3
In mosses the structure which performs the function of water absorption is the _________?
Rhizoids in mosses anchor the plant and absorb water and minerals from the surrounding environment. Unlike roots in higher plants, rhizoids are simple filamentous structures that perform absorption without true vascular tissues.
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Question 4
How does an enzyme affect the rate of a reaction?
Enzymes act as biological catalysts, lowering the activation energy required for reactions. By doing so, they accelerate metabolic processes without being consumed themselves, ensuring reactions occur efficiently under physiological conditions.
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Question 5
Insects that go through adult stage without becoming pupa are except ________
Crickets, cockroaches, and grasshoppers undergo incomplete metamorphosis, skipping the pupal stage. Bees undergo complete metamorphosis with egg, larva, pupa, and adult stages, differentiating them from insects with direct development.
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Question 6
Gregor Mendel is regarded as the father of ______
Gregor Mendel is recognized as the father of genetics for his work on inheritance patterns in pea plants. His experiments established the principles of segregation and independent assortment, forming the foundation of modern genetics.
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Question 7
The most efficient respiratory structure used by free-living protozoan is ________
Free-living protozoans rely on diffusion across their body surface to exchange gases. Their small size and high surface area to volume ratio allow efficient gas exchange without specialized respiratory organs.
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Question 8
Carbon (IV) oxide is added to the atmosphere when ________?
Carbon dioxide ($CO_2$) is released into the atmosphere when organic compounds are oxidized during cellular respiration in animals. Plants also release some $CO_2$ during respiration, contributing to the carbon cycle.
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Question 9
The host of liver fluke are ______?
Liver flukes are parasitic flatworms with a life cycle that involves snails as intermediate hosts and mammals such as pigs and sheep as definitive hosts, where adult flukes reproduce and release eggs.
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Question 10
Use the diagram to answer the question that follows:
The part labelled I is the ________
The part labelled I is the ________
The part labelled I in the diagram represents the stamen, which is the male reproductive organ of a flower responsible for producing pollen.
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