a. because the spores are lighted directly by the sun.
b. because the spores are transported by air and wind.
c. because the spores are very small and heavy.
d. because the spores are grafted to another plant.
32. In flowering plants, there are two events that lead to reproduction. What are these two events?
a. Fertilization and fission c. Pollination and fission
b. Pollination and fertilization d. Pollination and sporulation
33. Which of the following sequences shows the correct order of events that occur after an insect brings pollen to a flower?
a. germination, …show more content…
The population may experience exponential growth due to resource depletion.
46. Snakes prey on frogs. In order for the snake population to survive, how many frogs are needed compared to snakes?
a. Fewer frogs than snakes are needed.
b. More frogs than snakes are needed.
c. About the same number of frogs and snakes are needed.
d. There is no relationship between the number of frogs and snakes.
47. The graph below shows that changes in two populations of herbivores in a grassy field. What is the possible reason for these changes? a. all of the plant populations in this habitat decreased
b. population A produced more offspring than population B
c. population A consumed the members of population B
d. population B competed more successfully for food than population A
48. When rain came in from a weekend, she noticed that all of the fish in her aquarium were dead. Which of the following most likely caused this?
a. The light caused the fish to stay to the bottom.
b. The temperature fell and the dissolved oxygen went down.
c. The temperature was very high and the dissolved oxygen decreased.
d. The temperature was very high and the levels of dissolved oxygen went