4. A three-carbon alkene contains two double bonds. Predict its molecular formula?

A. C3H4

B. C3H5

C. C3H6

Which carbohydrate makes up the cell wall of fungi? A: Chitin B: Cellulose C: Glycogen

Imagine that you read a study of the effects of exercise on the prevalence of heart disease in women ages 35 to 65. Although you believe the experiment was carried out in an appropriate manner, you still do not believe the results.

Which by-product of photosynthesis was important in altering the atmosphere of the earth so that aerobic organisms could evolve?

What kind of mimicry is it when houseflies try to imitate wasps?

Which six letters will not appear in the coded message? Give a reason for your answer.

Explain the life cycle of plasmodium?

Compared to terrestrial plants, what challenges do aquatic plants have to overcome in order to carry out photosynthesis?

How are living mammals classified into groups? a. type of circulatory system b. method of development c. method of respiration d. method of regulating body temperature

In the european union what is the geographical unit of water pollution control?

Why is food waste harmful to the environment?