ORGANISMS AND THE ENVIRONMENT_day one
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Green crabs carry a parasitic worm that can infect organisms that prey on crabs. Which organism is most likely to be infected by this parasite?
The African Savanna is a grassland scattered with shrubs and small trees. The organisms that live in the savanna are shown below. Which two types of organisms have a producer-consumer relationship in this African Savanna?
Zebras and hyenas
Hyenas and cheetahs
Trees and elephants
Fungi and dung beets
A scientist named Joseph Connell studied two species of barnacles on the shore of a Scottish island. In the area between the average tide and the neap high tide, he found that the population of Species A was smaller than that of Species B. He removed Species B from one area but left both Species A and B in a similar area. The graph below shows the results of this study. Based on the data, which hypothesis was Connell most likely testing?
The populations of both species of barnacles increase more in warm water than in cool water.
Barnacles grow larger when they are isolated from other species.
The two species of barnacles compete with each other for resources.
The two species of barnacles are closely related to each other.
Black walnut trees produce a nontoxic chemical that becomes highly toxic when it is exposed to air or soil. How does this chemical help black walnut trees compete with plants growing nearby?
by attracting herbivores to other plants
by suppressing the growth of the other plants
by increasing the photosynthesis rates in other plants
by limiting the amount of water available to other plants
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