Chapter 1 test

Which of the following processes is not an example of excretion?

• breathing out carbon dioxide from the lungs

• passing undigested food from the anus

• removing urea through urination

• excess oxygen formed during photosynthesis

The body temperature of humans is about 37 ^oC. Which of the following processes produce(s) heat to maintain a constant body temperature?

(1) respiration

(2) movement

(3) growth

• (1) only

• (2) only

• (1) and (2) only

• (1) and (3) only

Which of the following is not evidence that plants are living organisms?

• Plants are green in colour.

• Plants carry out respiration all the time.

• Plants excrete by storing the waste products in leaves which then fall off in dry seasons.

• The roots of plants grow towards water.

Which of the following correctly matches the branch of biology with its scope?

• A

• B

• C

• D

Which of the following areas involve the application of biological knowledge?

(1) preservation of food

(2) production of medicines

(3) conservation of the environment

• (1) and (2) only

• (1) and (3) only

• (2) and (3) only

• (1), (2) and (3)

What is a hypothesis?

• a method to examine the idea proposed by scientists

• a prediction of the result of an experiment

• a proposed explanation of observations

• a method to analyse experimental data

Which of the following is the independent variable of the investigation?

• whether the students eat breakfast or not

• whether the students drink milk or not

• whether the students catch a cold or not

• whether the students have diarrhea or not

Which of the following assumption(s) should have been made so that a valid conclusion could be drawn?

(1) All students are in good health condition at the beginning of the investigation.

(2) The type and amount of milk drunk by the students are the same.

(3) The consumption of milk is the only factor that affects the students’ health.

• (3) only

• (1) and (2) only

• (2) and (3) only

• (1), (2) and (3)

The reliability of the investigation can be improved by

(1) involving more students in each group

(2) lengthening the duration of experiment

(3) asking Group 2 students to drink fruit juice instead of water

• (1) and (2) only

• (1) and (3) only

• (2) and (3) only

• (1), (2) and (3)

Based on the results, what conclusion can be drawn?

• Drinking milk can improve health.

• Drinking milk cannot improve health.

• Drinking milk can prevent diarrhea.

• The results did not provide solid evidence for drawing a conclusion.