3. What are the major differences between C3, C4, and CAM photosynthesis? 

2. What are the important processes during animal fertilization? 

III. Assay questions
1. What is our current understanding about the origin of mitochondria? What evidence supports this hypothesis? 

15. In a field of corn or lettuce on a farm, plants are cultivated with uniform spacing that will maximize plant growth. In natural habitats, however, a uniform pattern of dispersion is much less common. While exceptions do exist, for example in populations of creosote bush in the desert, which of the following best explains why natural populations of plants usually exhibit clumped or random dispersion patterns? (A) Patterns of higher soil moisture, the concentration of soil nutrients, and the distribution of seeds from parent plants may be highly variable. (B) Precipitation across landscapes, especially mountain ranges, is uniform. (C) The competitive interactions between individuals of the same population usually lead to such dispersion patterns. (D) Since nearly all plants are wind-pollinated, the direction of breezes can affect whether plants will produce seeds.

14. Which of the following functions is an advantage of seeds compared to spores? (A) using wind as a dispersal agent (B) containing a nutrient store for a developing sporophyte (C) relying on animals for pollination (D) providing nutrition for animals

13. Which of the following statements correctly describes the colonization of terrestrial habitats by plants? (A) It occurred in conjunction with insects that pollinated them. (B) It occurred in conjunction with fungi that helped provide them with nutrients from the soil. (C) It helped them to escape abundant herbivores in the oceans. (D) It occurred only about 150 million years ago.