Question

Ragweeds are flowering plants, common in North America. Pollen from ragweed causes many people allergy symptoms. The seed of ragweed has no paricular adaptation for dispersal. Most of the seeds of the ragweed plant fall into the soil next to the plant. However, since they often reach high densities in soil, they are easily spread from one site to another in soil clinging to boots, tires of vehicles, etc.



Earthworms live in the soil near the plants. An Ohio State weed scientist found that the earthworms collect the seeds around their burrows, for reasons the researchers have yet to determine. Although the earthworm will collect other weed seeds, giant ragweed seed seems to be the earthworm’s favorite to collect. About two-thirds of the ragweed seed buried by earthworms are capable of producing seedlings that emerge from the soil.

Do earth worms increase, decrease or do not affect the rag weed plants

Answer 1

Which of the following best explains the relatioship between the earthworm and ragweed plant?




Which of the following best explains the relatioship between the earthworm and ragweed plant?




Ragweed plants are harmed by the earthworms since the seeds are taken away from the parents.


Earthworms are helpful to the ragweed plants for reproduction since they disperse the seeds.


Ragweed plants harm the seeds since they do not receive sunlight stuck in the ground burrows.


Earthworms do not affect the ragweed plants since they do not eat the seeds they collect in their burrows.

Answer 2

Plants gain mass as they grow. Which of the following do plants take in during the process of photosynthesis that account for this mass gain? (choose 2)




Plants gain mass as they grow. Which of the following do plants take in during the process of photosynthesis that account for this mass gain? (choose 2)




water


glucose sugar


sunlight


oxygen


soil


carbon dioxide


nutrients in soil