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.
bot?
No, I am an AI language model created by OpenAI.
whats the answer
It increases the genetic diversity of the tree's offspring.
Evolution is a ______?
theory because it is an explanation that is supported by extensive observations, experimentation, and reasoning.
prediction because it makes an educated guess about events that will occur in the future
variable because it is a factor that can be changed during experimentation.
law because it has been proven without exception under certain stated conditions.
theory because it is an explanation that is supported by extensive observations, experimentation, and reasoning.
Which of the following is a method of reproduction that generally occurs very rapidly?
hybridizing
sexual
asexual
germination
asexual
Over time, the climate of a region becomes cooler. How will this most likely affect the species living in that region?
Some species that already have or that develop cold-weather adaptations through natural selection will survive, while species without cold-weather adaptations may go extinct.
All of the current species living in the region will migrate to warmer areas, while species adapted to cold-weather climates will migrate into the region.
All of the current species living in the area will become extinct, and new species better adapted to the climate will form and populate the region.
Most of the current species living in the area will develop beneficial mutations, which will lead to adaptations that help them survive in the new climate.
Some species that already have or that develop cold-weather adaptations through natural selection will survive, while species without cold-weather adaptations may go extinct.
Many sponges can reproduce asexually. Ladybugs, on the other hand, reproduce sexually. When small bits of a sponge are broken off—often by currents or by predators—they can float to new regions and regenerate as new sponges. A ladybug must find a mate before it can reproduce. One disadvantage of the sponge's method of reproduction is that
it requires more energy.
its offspring have little genetic diversity.
its offspring have greater genetic diversity.
it must devote a greater portion of its life cycle to reproduction.
its offspring have little genetic diversity.
Cheetahs are one example of a population that has very limited genetic variation. Which of the following groups of animals are most likely to have a limited variety in the genetics of their population?
animals that live on more than one continent
animals that have a very large population
animals that live in both hot and cold climates
animals on the endangered species list
animals on the endangered species list
An organism that contains two different alleles for a trait is said to be _______ for that trait
recessive
heterozygous
dominant
homozygous
heterozygous
Small differences between parents and offspring accumulate over time. This process
prevents parents from being able to care for their offspring.
makes it impossible for species to adapt to changes in their environment.
results in only one type of organism that has the exact same characteristics as its ancestors.
results in many different types of organisms with different characteristics from their ancestors.
bot
This process results in many different types of organisms with different characteristics from their ancestors. It is a part of the process of evolution by natural selection.
What genetic factor is most likely to result in the extinction of an entire species?
a lack of genetic variety in the population
a genetic defect in a few members of the population
a genetic resistance against many diseases
a lot of genetic variety in a population