In Thoughts of Hanoi what is the author’s tone toward the setting?
hateful and cruel
mournful and nostalgic
apologetic and regretful
jealous and vengeful
mournful and nostalgic
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?
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.
The genetic engineering of crops is a controversial and debated issue in the media and press. Which of the following would be an argument in favor of the genetic engineering of corn?
improved nutritional content
increased crop yields
reduction of pesticide use
all of these
all of these
Which of the following is an example of natural selection
Pesticides are sprayed in a field, resulting in an increase in crop growth and a decrease in insect population.
Cricket frogs prefer to sleep during the day, while red-eyed tree frogs prefer to sleep during the night.
To produce a more desirable fruit, a farmer crosses a tree that produces sweet oranges with a tree that produces large oranges.
Rabbits with a mutation for longer, thicker fur survive an unusually cold winter, while many normal rabbits do not survive.
Rabbits with a mutation for longer, thicker fur survive an unusually cold winter, while many normal rabbits do not survive.
If there were no decomposers, which of the following would most likely happen?
Some plants might die due to a shortage of important nutrients.
The amount of dead plant and animal matter would decrease.
Plants and animals would remain living for a longer period of time.
Animals would start carrying out photosynthesis.
Some plants might die due to a shortage of important nutrients.
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?
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.