This biology question covers important biological concepts and processes. The step-by-step explanation below helps you understand the underlying mechanisms and reasoning.
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Fresh day cafu, let's solve. Here are the solutions to the multiple-choice questions: 14. The stage of development between childhood and adulthood in humans is known as A. teenage. B. puberty. C. infancy. D. adolescence. The period between childhood and adulthood is called adolescence. The correct option is D. adolescence. 15. Oxygen gas is represented by the chemical symbol O_2. This symbol represents two A. ions of oxygen. B. atoms of oxygen. C. molecules of oxygen. D. elements of oxygen. The chemical symbol O_2 indicates that two oxygen atoms are bonded together, forming a molecule of oxygen. The correct option is C. molecules of oxygen. 16. Which of the following statements is true of anions? They contain A. more protons than electrons. B. the same number of protons and neutrons. C. less protons than electrons. D. more protons than neutrons. An anion is a negatively charged ion, meaning it has gained one or more electrons. Therefore, it has more electrons than protons. The correct option is C. less protons than electrons. (Note: The question asks about protons relative to electrons. If an anion has more electrons, it must have less protons than electrons to be negatively charged). 17. Which of the following foods contains the greatest amount of protein? A. Mushroom B. Yam C. Plantain D. Cheese Among the given options, cheese is a dairy product known for its high protein content. Mushrooms, yams, and plantains are generally lower in protein compared to cheese. The correct option is D. Cheese. 18. Which of the following methods are used in making magnets? I. Induction II. Stroking III. Hitting A. I, II and III B. I and II only C. II and III only D. I and III only Induction, stroking, and hitting (or hammering) are all common methods used to magnetize materials. The correct option is A. I, II and III. 19. The most suitable tool for transplanting vegetable seedlings is the A. hand trowel. B. hand fork. C. cutlass. D. hoe. A hand trowel is a small, hand-held tool with a scoop-shaped blade, ideal for digging small holes and transplanting seedlings without damaging their roots. The correct option is A. hand trowel. 20. What is formed when the path of light rays is blocked by an opaque object? A. Penumbra B. Umbra C. Shadow D. Echo When an opaque object blocks light, it creates an area where light cannot reach, which is called a shadow. The umbra and penumbra are parts of a shadow. The correct option is C. Shadow. 21. The force that results when a comb is rubbed through dry hair is A. gravitational force. B. electrostatic force. C. frictional force. D. magnetic force. Rubbing a comb through dry hair causes a transfer of electrons, leading to a buildup of static electric charge. The force between these charges is an electrostatic force. The correct option is B. electrostatic force. What's next?