SECTION III Questions 21-25 (Five questions) Directions: For each of the questions below, ONE or MORE of the response(s) is (are) correct. Decide which of the response(s) is (are) correct. Then choose:

Here are the solutions for the questions: SECTION III Question 21: Statement 1: Producers are autotrophic organisms. (True, they produce their own food). Statement 2: Each organism has many food sources. (False, many organisms have specialized diets). Statement 3: Producers release carbon dioxide during photosynthesis. (False, producers take in* carbon dioxide during photosynthesis and release oxygen). Only statement 1 is correct. The correct option is D. D Question 22: Statement 1: The biceps muscles contract. (True, biceps contract to bend the arm). Statement 2: The triceps muscles relax. (True, triceps are antagonistic to biceps and relax during arm bending). Statement 3: The ulna and radius straighten. (False, these bones are part of the forearm and do not straighten during bending; the elbow joint bends). Statements 1 and 2 are correct. The correct option is B. B Question 23: Statement 1: Occurs as a result of the eyeball being large. (True, an elongated eyeball causes light to focus in front of the retina). Statement 2: Near objects are seen clearly. (True, short-sighted individuals can see near objects clearly). Statement 3: Is corrected with the use of concave lenses. (True, concave lenses diverge light to correct the focus on the retina). Statements 1, 2, and 3 are all correct. The correct option is A. A Question 24: Statement 1: Sweating is inhibited. (False, sweating increases* during overheating to cool the body). Statement 2: Vasodilation occurs. (True, blood vessels near the skin dilate to increase heat loss). Statement 3: The hair erector muscles relax. (True, these muscles relax to allow heat to escape, as they contract to trap air when cold). Statements 2 and 3 are correct. The correct option is C. C Question 25: Statement 1: They have wings. (True, wings are essential for flight). Statement 2: They have hollow bones. (True, hollow bones reduce body weight, aiding flight). Statement 3: They have streamline bodies. (True, streamline bodies reduce air resistance, aiding flight). Statements 1, 2, and 3 are all correct. The correct option is A. A SECTION IV Question 26: First statement: During anaerobic respiration glucose is partially broken down. (True). Second statement: Anaerobic respiration occurs in the cytoplasm. (True). The second statement describes the location of anaerobic respiration but does not explain why glucose is only partially broken down. The partial breakdown is due to the absence of oxygen for complete oxidation. Both statements are true, but the second is NOT a correct explanation of the first. The correct option is B. B Question 27: First statement: Arteries have small lumen and thick elastic walls. (True). Second statement: Arteries carry blood away from the heart. (True). Arteries carry blood under high pressure away from the heart, which explains why they need thick, elastic walls and a small lumen to withstand and maintain this pressure. Both statements are true, and the second is a correct explanation of the first. The correct option is A. A Question 28: First statement: Fresh water Amoeba possesses contractile vacuole. (True). Second statement: The cytoplasm of fresh water Amoeba is more concentrated than the surrounding water. (True). The higher concentration of the Amoeba's cytoplasm compared to freshwater causes water to constantly enter by osmosis, necessitating the contractile vacuole to expel this excess water. Both statements are true, and the second is a correct explanation of the first. The correct option is A. A Question 29: First statement: Acid rain results when Sulphur dioxide and nitrogen dioxide are released into the atmosphere. (True). Second statement: Sulphur dioxide and nitrogen dioxide in the atmosphere originate from the burning of fossil fuels. (True). The second statement explains the source of the pollutants, not the mechanism by which they cause acid rain. Both statements are true, but the second is NOT a correct explanation of the first. The correct option is B. B Question 30: First statement: The body of most mammals is covered with fur or hair. (True). Second statement: Fur or hair assist in the control of body temperature. (True). The presence of fur or hair in mammals is primarily for thermoregulation, providing insulation to control body temperature. Both statements are true, and the second is a correct explanation of the first. The correct option is A. A Drop the next question! 📸