7. A new predator is introduced into the ecosystem shown in the food web below. This predator feeds on bees and mice. How will this most likely affect the species in this ecosystem?
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1 point
Captionless Image
There will be a decrease in bees and mice which will cause an increase the black bear population and a decrease in the fox population.
There will be an increase in bees and mice which will cause an increase in the populations of both black bears and foxes.
There will be an increase in bees and mice which will cause a decrease in the black bear population and an increase in the fox population.
There will be a decrease in bees and mice which will cause a decrease in the populations of both black bears and foxes.
There will be a decrease in bees and mice which will cause a decrease in the populations of both black bears and foxes.
7. A new predator is introduced into the ecosystem shown in the food web below. This predator feeds on bees and mice. How will this most likely affect the species in this ecosystem?
*
1 point
Captionless Image
There will be a decrease in bees and mice which will cause an increase the black bear population and a decrease in the fox population.
There will be an increase in bees and mice which will cause an increase in the populations of both black bears and foxes.
There will be an increase in bees and mice which will cause a decrease in the black bear population and an increase in the fox population.
There will be a decrease in bees and mice which will cause a decrease in the populations of both black bears and foxes.
There will be a decrease in bees and mice which will cause a decrease in the populations of both black bears and foxes.
2. Look at the food web shown below. Which organisms get energy from producers?
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1 point
Captionless Image
squid
zooplankton
sperm whales
phytoplankton
zooplankton
15. Some redwood trees reproduce both sexually and asexually. Once a tree reaches maturity, it can reproduce with another tree through pollination and fertilization. The tree then disperses thousands of seeds so that some of them might take root. However, a tree can also reproduce asexually. If it falls down, several smaller trees can sprout from its trunk without the need of fertilization.Why is it advantageous for a redwood to reproduce sexually when it could reproduce asexually instead?
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1 point
It reduces the need to find a mate.
It increases the energy needed to reproduce.
It increases the genetic diversity of the tree's offspring.
It decreases the time needed to reproduce.
It increases the genetic diversity of the tree's offspring.
16. _______ provide evidence that living things evolved from earlier species.
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1 point
Historical fictions
Religions
Fossils
Videos of dinosaurs
Fossils
4. Relationships between organisms may be beneficial or detrimental. Which of the following examples shows a relationship in which both organisms benefit?
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1 point
A tick attaches itself to the skin of a dog and takes a blood meal.
A female black widow spider Latrodectus mactans mates with a male spider; then, she consumes him.
An African wasp Certolsolen arabicus pollinates a fig tree Ficus sycomorus as it eats the tree's nectar.
A species of hyena known as the aardwolf consumes termites for nourishment.