Which of the following is a byproduct of the chemical reactions involved in making glucose as well as necessary for animal life oxygen and fossil fuels
only oxygen
only fossil fuels
only hydrogen gas

Name the plastid and pigment likely to be found in the cells of (a) petals of sunflower (b) ripe tomato.

Explain why phospholipid molecules form a bilayer. (3 marks)

What does the hardy-weinberg principle relate to? a. chances of survival of an organism b. frequency of alleles in a population c. natural selection in a species d. causes of evolution among organisms