In “The Lottery,” how does the fact that names are called and people select their piece of paper work to create suspense?
a. Readers know males draw the papers.
b. Readers watch every family participate.
c. Readers wonder what the papers signify.
d. Readers want to participate in the drawing.***
I think its C
it is C
"... create suspense?"
I disagree.
which of the following causes genetic variation?
A. errors during replication
B.genetic recombination through meiosis
C. mutations caused by environmental factors
D. all above
What happens during meiosis?
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a. Chromosome pairs separate to form new sex cells, increasing genetic variation.
b. Each sex cell copies itself to form four new sex cells that are all identical.
c. Each sex cell loses half of its chromosomes, decreasing genetic variation.
d. Chromosome pairs remain together when new sex cells are formed, maintaining the same level of genetic variation.
Lame
D. all above - errors during replication, genetic recombination through meiosis, and mutations caused by environmental factors can cause genetic variation.
a. Chromosome pairs separate to form new sex cells, increasing genetic variation.
Sometimes, during the process of replication, the DNA code is copied incorrectly, and an incorrect nucleotide is attached to the new strand of DNA. This type of mutation (also shown below) is called a
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a. Substitution
b. Insertion
c. Deletion
d. Translocation
a. Substitution.
How does radiation cause mutations?
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The extreme heat caused by radiation ruptures the lysosomes found in cells.
Radiation prevents crossing over during metaphase I
Radiation breaks apart the bonds that hold DNA together. Mutations may result when the cell tries to put the pieces back together.
Radiation causes DNA methylation
Radiation breaks apart the bonds that hold DNA together. Mutations may result when the cell tries to put the pieces back together.
Mutations in which type of cells are passed on from parent to offspring?
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a. Body cells
b. Somatic cells
c. Sex cells
d. Heterozygous cells
c. Sex cells, mutations that occur in sex cells (eggs and sperm) can be passed on from parent to offspring.
What do the arrows represent in the food chain below?
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What each animal eats
The flow of energy
The trophic levels
How organisms are decomposed
The flow of energy.
The arrows in a food chain represent the transfer of energy and nutrients as one organism is consumed by another. They show the direction of energy flow from the producers, through the different trophic levels, to the top predators.
In the food chain below, the rabbit has 280 Kcal in it's energy level. How many Kcals of energy are in the fox's trophic level?
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2,800 Kcal
280 Kcal
28 Kcal
2.8 Kcal
Since 10% of the energy from one trophic level is typically passed on to the next, we can calculate the energy available at the fox's trophic level by multiplying the energy available at the previous level by 10%. Thus, the energy available at the fox's trophic level is:
10% x 280 Kcal = 28 Kcal
Therefore, there are 28 Kcals of energy in the fox's trophic level.
How many carbon atoms are on the left side of the formula? How many carbon atoms are on the right side of the formula?
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Left: 6, Right: 6
Left: 6, Right: 12
Left: 12, Right: 12
Left: 12, Right: 6
Left: 6, Right: 12
The chemical formula shown in the image is C6H12O6, which represents glucose. There are 6 carbon atoms on the left side of the formula, and 12 carbon atoms on the right side of the formula.
How are molecules cycled back through the ecosystem?
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Molecules are cycled back through the ecosystem when organisms die. Decomposers break down dead and decaying organisms and return their molecules back into the ecosystem.
Molecules are cycled back through the ecosystem during photosynthesis.
Molecules are cycled back through the ecosystem during cell respiration.
All of the above are ways that molecules cycle through the ecosystem.
A. Molecules are cycled back through the ecosystem when organisms die. Decomposers break down dead and decaying organisms and return their molecules back into the ecosystem.
When organisms die, their bodies are broken down by decomposers such as bacteria and fungi. These decomposers break down organic matter back into its basic building blocks, releasing the stored energy and nutrients back into the ecosystem. This process is known as decomposition.
Which organism could be labeled as both a secondary consumer AND a tertiary consumer?
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Be careful and double check yourself... it's easy to get this one wrong if you don't analyze it carefully enough!
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Fox
Hawk
Puma
Puma.
In the given food chain, the puma feeds on the fox, which makes it a secondary consumer. But the puma also feeds on the hawk, which makes it a tertiary consumer.
Habitats are shrinking and becoming more fragmented. This means:
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habitats are being broken into smaller, separated areas
habitats are being invaded by foreign species
habitats are being rebuilt by humans to restore their original pristine state
Habitats are being broken into smaller, separated areas.
Habitat fragmentation occurs when large, contiguous habitats are divided into smaller, isolated patches as a result of human activities such as deforestation, urbanization, and agricultural practices. This is a serious problem for wildlife conservation because it can lead to species decline and loss of biodiversity, due to various factors such as reduced habitat area and quality, increased isolation, and altered ecological processes.
How do invasive species impact native species in an ecosystem?
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Invasive species allow more native species to thrive.
Invasive species create more biodiversity.
Invasive species introduce more resources for native species.
Invasive species compete with native species for the same resources.
Invasive species compete with native species for the same resources.
Invasive species often have no natural predators or competitors in their new environment, allowing them to rapidly reproduce and spread. As a result, they can often outcompete and displace native species that rely on the same resources such as food, water, and shelter. This competition can lead to reduced populations and even extinctions of native species, reducing the biodiversity of an ecosystem.
How has climate change impacted the environment
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It has increased the amount of trash in the ocean.
It has lowered the average sea level by 1.2 meters (4 feet).
It has increased the size of the Arctic.
It has decreased the size and number of glaciers.
It has decreased the size and number of glaciers.
Climate change has caused global temperatures to rise, which has led to the melting of glaciers worldwide. Glaciers are a critical source of freshwater and support a variety of ecosystems, so their decline has significant impacts on both human societies and the environment. As glaciers disappear, water supplies for millions of people are affected, and ecosystems that rely on meltwater are altered.
How does pollution travel from a river to the ocean?
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Pollution flows upstream toward the ocean.
Pollution flows downstream toward the ocean.
Pollution flows toward the bank of a river and then to the ocean.
Pollution flows toward the source of a river.
Pollution flows downstream toward the ocean.
Rivers are part of a larger watershed that eventually flows into an ocean or another body of water. Pollution from various sources (such as agriculture, industry, and urbanization) can enter a river through runoff, sediment, or direct discharge. Once in the river, pollution flows downstream with the current, eventually reaching the ocean if the river is connected to it.
How can people conserve energy in their own homes?
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They can use LED light bulbs.
They can wash their clothes in hot water.
They can increase their use of natural gas.
They can install coal-powered heaters.
They can use LED light bulbs.
People can conserve energy in their homes by adopting energy-efficient practices, such as using LED light bulbs, which use less energy compared to traditional incandescent bulbs. Other ways to conserve energy include using natural lighting, turning off lights and electronics when not in use, properly insulating homes to reduce heating and cooling needs, using Energy Star-certified appliances, and choosing energy-efficient heating and cooling systems. Washing clothes in cold water, turning down the thermostat, and reducing water usage can also help. Using coal-powered heaters should be avoided as they are a major source of greenhouse gas emissions and air pollution.
Choose the best description for the term "survival of the fittest"
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only the strongest and fastest survive
only the biggest survive
the strongest, biggest, and fastest organisms are most likely to survive
the ability to survive and reproduce
The ability to survive and reproduce.
The term "survival of the fittest" is often misunderstood to mean only the strongest, biggest, or fastest organisms are most likely to survive. In fact, the term refers to the ability of an organism to survive and reproduce in its environment. It is a fundamental principle of evolution, where organisms that are better adapted to their environment are more likely to survive and pass on their traits to their offspring. This does not necessarily mean physical strength or size but can also refer to a range of traits such as resistance to disease, ability to obtain food, and successful reproduction.
Which of the following is an example of natural selection?
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a species of corn is genetically modified to produce a natural insecticide, resulting in an increase in crop growth and a decrease in insect population
a farmer breeds a certain cow that produces more milk than his other cows to produce more cows that produce a lot of milk.
an aloe vera plant species possessing a trait for extra thick leaves survives a long drought in a desert, and an aloe vera species that has thinner leaves does not.
owls sleep during the day, and doves sleep during the night
An aloe vera plant species possessing a trait for extra thick leaves survives a long drought in a desert, and an aloe vera species that has thinner leaves does not.
Natural selection is the process by which organisms that are better adapted to their environment are more likely to survive and reproduce, passing on their advantageous traits to their offspring. In this example, in a long drought in a desert, the aloe vera plant with extra thick leaves is more likely to survive because it is better adapted to retain water, whereas the aloe vera plant with thinner leaves is less adapted to this environment and is less likely to survive. Thus, over time, the frequency of the trait for extra thick leaves will increase in the population, demonstrating the process of natural selection.