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WAEC BiologySierra Leone

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Question 31

What is the primary function of xylem vessels in plants?
Levels of organizationLevels of organizationmedium

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Question 32

Which pigment primarily captures light energy during photosynthesis?
Photosynthesis and respirationPhotosynthesis and respirationeasy

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Question 33

Which part of the human nephron is primarily responsible for selective reabsorption?
Excretion and osmoregulationExcretion and osmoregulationmedium

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Question 34

Which hormone regulates blood sugar levels by lowering glucose concentration in the blood?
Coordination and responsivenessCoordination and responsivenessmedium

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Question 35

In a monohybrid cross between two heterozygous tall pea plants (Tt), what is the expected genotypic ratio of the offspring?
Heredity and geneticsHeredity and geneticshard

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Question 36

Which of the following best explains natural selection?
Variation and evolutionVariation and evolutionmedium

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Question 37

In an ecosystem, which process involves the conversion of atmospheric nitrogen into a form usable by plants?
EcologyEcologyhard

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Question 38

Which organelle is primarily responsible for producing energy in the form of ATP in eukaryotic cells?
Cell structure and ultrastructureCell structure and ultrastructureeasy

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Question 39

Which process allows the movement of water molecules across a selectively permeable membrane from a region of low solute concentration to high solute concentration?
Cell activities and transportCell activities and transporteasy

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Question 40

During which phase of mitosis do sister chromatids separate and move to opposite poles of the cell?
Division of cellsDivision of cellsmedium

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