Which of the following most likely supports the most sustainable ecosystem?
Which of the following contributes most to promoting sustainability in an ecosystem?
Which factor will negatively affect biodiversity?
Which factor is least likely to determine the biodiversity of an area?
Elephant are considered an important species in east Africa. During droughts, they dig deep holes in dry riverbeds, and the holes fill up with water. These holes are then used by all other animals in the area. Which of the following most accurately describes how the loss of elephants would affect this ecosystem?
Zebra mussels were first discovered in the Great Lakes thirty years ago and have since spread to lakes throughout the region. Zebra mussels reproduce quickly and have few natural predators.
What will most likely happen to other native mussel species in the Great Lakes region?
Which of these relationships is most correct?
Deer are introduced into a grassland ecosystem and their population increases considerably. If the deer population continues to grow, which is the MOST likely outcome for the ecosystem?
Which of these is a threat to the survival of an ecosystem?
Why is a reduction in biodiversity due to loss of plant populations especially destructive to an ecosystem?
Which of these explains why an
ecosystem is healthy when it has a variety of species?