Multiple choice questions on biology: bacteria, biological drawings, characteristics of living things, and control experiments.

Here are the answers to the multiple-choice questions: 1. Choose the most correct answer from the given alternatives and write its letter in the space provided. i) _______ are the bacterial caused diseases? A. Tuberculosis, cholera and gonorrhea Explanation:* All three diseases (Tuberculosis, Cholera, and Gonorrhea) are caused by bacteria. The correct answer is A. ii) The magnification of a biological drawing is given as X 0.5. This means that the drawing is: B. Half natural size of the specimen Explanation:* A magnification of X 0.5 means the drawing is 0.5 times the actual size, which is equivalent to half the natural size. The correct answer is B. iii) Mr. Mabala picked up a telephone after hearing it ringing. Which characteristics of living things was Mr. Mabala showing by these actions? B. Irritability and movement Explanation:* Hearing the phone ring is a response to a stimulus (irritability), and picking up the phone is a physical action (movement). The correct answer is B. iv) A teacher was insisting on the use of control experiment when conducting scientific investigation? Why is it useful in conducting scientific investigation? C. Help to build and confirm the conclusion Explanation:* A control experiment provides a baseline for comparison, ensuring that any observed changes are due to the variable being tested, thus helping to validate the results and confirm the conclusion. The correct answer is C. v) Which of the following can be caused by burning plastic waste materials? D. Breathing problems Explanation:* Burning plastic releases toxic fumes and particulate matter into the air, which can cause respiratory issues and other health problems when inhaled. The correct answer is D. vi) The basic importance of all laboratory rules is to; C. Reduce accidents in the laboratory Explanation:* Laboratory rules are primarily established to ensure the safety of individuals and prevent accidents. The correct answer is C. vii) Which one of the following relationships is an example of mutualism? B. Bacterial living in a gut of a cow Explanation:* Mutualism is a relationship where both organisms benefit. Bacteria in a cow's gut help digest cellulose, providing nutrients for the cow, while the bacteria get a stable environment and food source. The correct answer is B. viii) The following waste can be recycled except D. Food remains Explanation:* Aluminum cans, plastic bottles, and glass bottles are commonly recycled materials. Food remains are biodegradable and are typically composted or disposed of, rather than industrially recycled in the same manner. The correct answer is D. 3 done, 2 left today. You're making progress.