Answers
The correct statement is "It caused many organisms to die off" because oxygen was toxic to them.
Option (b) is correct.
The Great Oxidation Event refers to the period of time approximately 2.4 billion years ago when oxygen began to accumulate in the Earth's atmosphere due to the evolution of photosynthetic organisms like cyanobacteria.
This event had a significant impact on the evolution of life on Earth, as the presence of oxygen allowed for the evolution of aerobic respiration, which is much more efficient than anaerobic respiration. However, the sudden increase in oxygen also caused many anaerobic organisms to die off because they were unable to tolerate the presence of oxygen,
Therefore, the correct answer is option B
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Related Questions
6. Make Models Develop a taxonomic key that
a person could use to identify the following ani-
mals: hawk, alligator, duck, snake
Answers
Dichotomous keys are classification tools used to identify taxonomic groups based on distinctive traits. You will find the taxonomic key in the text below.
What is a dichotomous key?
A dichotomous key might be considered a significantly useful tool to classify organisms. The key provides an easy and fast way for identification by describing different morphological traits, leading you to the correct taxonomic classification.
The key provides morphological descriptions about different taxonomic groups in an easy way to identify these traits in your individual.
A dichotomous key will always provide two options (a and b, or 1 and 2), and you will have to choose one of them according to the characteristics of your organism. The morphological descriptions are made in order to discriminate groups.
In the exposed example, we have four animals. Let us analyze their characteristics.
A hawk has feathers, two legs, two wings, claws, hooked peakAn alligator has scames, four legs, no wings, small claws, several sharped teeth.A duck has feathers, two palmate legs, two wings, no claws, plane peakA snake has scames, no legs, no wings, no haws, several sharped teeth.Now. with these descriptions we can make the classification tool.
1) a- It has feathers --------------- go to 2
b- It has scames ---------------- go to 3
2) a- It has claws, a hooked peak, and unpalmate legs -------- Hawk
b- It has a plane peak and palmate legs --------------------------- Duck
3) a- It has four legs ------------- Alligator
b- It does not have legs -------- Snake
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10. Apply Scientific Reasoning Explain how a
vaccine can prevent you from getting ill from
a virus without making you ill.
Answers
Antibodies that have previously been produced destroy and remove pathogens, so protecting the individual from illness and/or death.
What is a Vaccine?A vaccination is a biological preparation that induces active acquired immunity against a specific infectious or malignant disease. Vaccine safety and effectiveness have been extensively researched and validated.
Vaccines are often administered through needle injections, however, some can also be administered orally or through the nose.
Vaccines provide protection against a variety of infectious diseases.
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Label the parts of the muscle tissue as indicated in the image.
Answers
The labeled parts of the muscle tissue as indicated in the image are found in the attachment.
What is muscle tissue?Muscle tissue is made up of cells with the unique capacity to shorten in order to cause movement of the bodily components. The tissue is packed with blood vessels and has a high cell density.
Cardiac, smooth, and skeletal muscle tissue are the three types.
Cardiac muscle cells are found in the walls of the heart, have a striated appearance, and are controlled by an automatic mechanism.
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What would happen to this ecosystem if another apex predator, such as a killer whale, was introduced?
Answers
The introduction of an apex predator, such as a killer whale to an ecosystem can have significant impacts on the existing food web and ecosystem dynamics.
Thus, the presence of a new apex predator, such as a killer whale increases the competition between the existing apex predator and the newly introduced predator for food resources, such as seals and sea lions.
The introduction of a new apex predator can also affect the behavior of the existing species. For example, the seals can change their behavior to protect themselves from predation by the killer whale by changing their movement patterns.
The introduction of a new apex predator like a killer whale to this ecosystem require careful monitoring and management to minimize the negative impacts on the ecosystem.
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In a certain area where there are many farms, the groundwater levels have dropped by as much as 10 m over a period of 30 years. The main cause behind this is MOST LIKELY
Answers
The excessive pumping of water through wells is the most likely cause behind the drop in groundwater levels in the given area with many farms. Option b is correct.
The overuse of groundwater resources, especially for agricultural purposes, is a common problem that leads to a decline in groundwater levels. As farmers pump more and more water from wells to irrigate their crops, the natural recharge rate of the aquifer is unable to keep up with the extraction rate.
This can result in a long-term decline in the water table, which can be exacerbated by drought or other climatic factors. Option b is correct.
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Complete question will be
In a certain area where there are many farms, the groundwater levels have dropped by as much as 10 m over a period of 30 years. The main cause behind this is MOST LIKELY
Question 5 options:
the leakage of fertilizers from the farms into the aquifer.
the excessive pumping of water through wells.
the evaporation of water from aquifers.
the construction of a dam to divert water into a reservoir.
2. In Albinism, no pigmentation is produced in the skin, hair, and eyes. This is due to a
mutation for the gene that produces the enzyme tyrosinase which produces melanín.
Albinism is a recessive trait. Two heterozygous parents (Aa), both with normal
pigmentation, mate. What are the chances that their offspring will be albino? Show
your Punnett squares & results.
Answers
Only 25% of the offspring of the parents would be seen to show albinism.
What is albinism?Albinism is a rare hereditary disorder brought on by gene abnormalities that impact how much melanin your body generates. The pigmentation (color) of your skin, eyes, and hair is regulated by melanin. Albinism is characterized by abnormally pale skin, eyes, and hair.
Based on the information given, there is a 25% chance that their offspring will have albinism (aa genotype).
Therefore, the probability of their offspring having albinism is 25%, which means that for every 4 children born to these parents, one is expected to have albinism.
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On a shade-grown coffee plantation, smaller coffee trees grow in the shade of other forest trees. Why is shade-grown coffee more sustainable than coffee grown in full sun?
A. It provides greater profits for farmers.
OB. It provides habitat for forest birds.
O C. It reduces forest biodiversity.
D. It produces more coffee beans.
Answers
The reason why it is more sustainable is that It provides habitat for forest birds.
What is shade grown coffee?Owing to the fact that it provides home for forest birds and encourages biodiversity, coffee farmed in the shade is said to be more environmentally friendly than coffee grown in full sunlight.
Shade-grown coffee farms keep their tree canopy intact, preserving the habitat for species such as birds, insects, and other creatures vital to the ecosystem's health.
By minimizing deforestation and soil degradation, this method of growing coffee has been found to conserve the environment and preserve biodiversity.
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Please help, I keep getting 8/9 of these right. Future global warming is expected to cause:
Answers
Answer: More frequent wildfires
Stronger, longer-lasting droughts over all of the U.S
Explanation: Warmer weather causes more dry soil and vegetation, leading to more wildfires.
PART B: Compare the genetic variation of the smaller population with the genetic variation of
the original population. Identify the vocabulary term that most specifically describes this form of
genetic drift. (Is it population bottleneck or the founder effect?)
Answers
The genetic variation of the smaller population will be reduced compared to the original population.
The vocabulary term that most specifically describes this form of genetic drift is the founder effect.
What happens to small populations overtime?Small populations are more liable to genetic drift, which can lead to loss of genetic variation and increase in frequency of certain alleles. This can reduce the genetic diversity of the population and increase its likelihood to inbreed, resulting in the expression of deleterious recessive alleles.
Reduction of smaller population is because the smaller population is a part of the original population and only a few number of individuals from the original population contribute their own genes to new population.
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Scenario: What 2 systems are working together? Horned lizards have a defense mechanism that includes shooting blood from their eyes. The major veins surrounding the eye of the lizard are controlled by muscles. When the lizard contracts these muscles, blood flow is increased to the head. As a result, a specialized membrane similar to an eyelid fills with blood. Muscles in the eyelid and eye contract to shoot blood when predators approach. Scientists believe the blood deters predators.
Answers
The two systems that are working together in this scenario are the circulatory system and the muscular system. The circulatory system, which includes the heart, blood vessels, and blood, is responsible for transporting oxygen and nutrients throughout the body. In the case of the horned lizard, the circulatory system is involved in supplying blood to the area around its eyes.
The muscular system is responsible for the movement of the body and the maintenance of posture. In the case of the horned lizard, the muscular system controls the major veins surrounding the eye and is responsible for contracting the muscles to increase blood flow to the head. The muscles in the eyelid and eye also contract to shoot blood when predators approach.
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1. Marco's little brother is watching a TV program about the gene that causes the genetic disease hemophilia. People with this disease cannot make a protein that is needed for blood to clot. After a few minutes, he turns to Marco and asks, "what exactly is a gene, anyway?"
Which of the following BEST describes a gene?
A. A gene is a random change to an organism's DNA.
B. A gene is a structure in a cell that contains the cell's chromosomes.
C. A gene is made of DNA and contains the instructions for building proteins.
D. A gene is a protein that makes up an organism's structure and helps it function.
Answers
A gene can be described as being made up of DNA and it contains the instructions which are required for the building of the proteins.
The correct option is option C.
Genes are basically considered as the the functional units of heredity as they are basically composed of DNA, which is the nucleic acid responsible of the transmission of information from one generation to the other generation.
The chromosomes which are present in our body are basically made up of DNA which contain a number of genes. Each of the gene basically comprises of certain set of instructions which are required in order to perform a particular function or codes for some proteins.
Hence, the correct option is option C.
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functions of viruses
Answers
1. Replication: Viruses are capable of replicating themselves within a host cell.
2. Transmission: Viruses can spread from one host to another, either through direct contact or through a vector such as a mosquito or tick.
3. Disease: Viruses can cause a variety of diseases in humans, animals, and plants.
4. Evolution: Viruses can evolve over time, leading to the emergence of new strains that may be more virulent or resistant to treatment.
5. Research: Viruses are often used in research to study basic biological processes, develop new treatments, and create vaccines.
Answer:
reproduction to make copies of itself.ecological regulation of lake carbon cycling process.they drive microbial evolution.influence global biogeochemical cycles .to deliver it's genome into the host cell to allow it's expression (transcriptipn and translation) by the host cell.PLEASE HELP IVE BEEN STUCK ON THESE TWO QUESTIONS FOR A LONG TIME
Answers
Answer: honestly it really depends on the water and how its dripped
Explanation:
Drag the labels to the correct location on the Punnett square. Not all labels will be used.
In the pea plant, the allele for green pod color (G) dominates the allele for yellow pod color (g). The Punnett square illustrates a cross for this trait
Which offspring can be described by the GG and gg genotypes in the table?
mentum. All rights reserved.
homozygous
offspring with
yellow pod color
G
g
homozygous
offspring with
green pod color
heterozygous
offspring with
yellow pod color
G
GG
Gg
g
Gg
99
C
56°5
C
Answers
The offspring can be described by the GG and gg genotypes are the homozygous dominant and the homozygous recessive genotypes offspring.
What are homozygous genotypes?Homozygous genotype refers to having two identical copies of the same gene—one inherited from the mother and one from the father—that are present. Either both genes in a homozygous genotype are normal or both genes share the same mutation.
Having identical alleles for just one attribute is what is meant by being homozygous. When two identical copies of a gene are present, you are said to be homozygous for that gene.
An example is the GG and the gg genotypes which are homozygous dominant and the homozygous recessive genotypes.
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you and your friend in the school yard. you rest your ear against a metal leg of the swings while your friend gently taps on the leg. you hear the tapping. describe the wave produced bt tapping. is it a longitudinal wave or a transverse wave? Draw a model of the wave.
Answers
The wave produced by tapping on the metal leg of the swings is a longitudinal wave. Longitudinal waves have oscillations that occur parallel to the direction of wave propagation.
When your friend taps on the metal leg, it causes compression in the material. This compression then travels through the metal as a wave, with successive compressions and rarefactions. As the wave reaches your ear, it causes your eardrum to vibrate, and you perceive the tapping sound.
| | | | |
C R C R C
| | | | |
The "C" represents compression, and the "R" represents a rarefaction. The wave propagates from left to right, with each compression and rarefaction alternating in sequence. As you rest your ear against the metal leg of the swings, you are able to detect the longitudinal wave as it travels through the metal and into your ear.
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which statement best describes the nucleaus a.)to hold a plants cells DNA b.)to hold a plants cell DNA c.)to hold all types of cells DNA D.)to hold both plants and animals cells DNA
Answers
Answer: B
Explanation:
Prior Knowledge... The INITIAL rise in the line of the graph is an example of * 1 point population growth in a species as a result of? Use the graph to answer the question below.
A. a decrease in biodiversity
B. an increase in food supply
C. a decrease in habitat Time
D. an increase in natural predators
Answers
The initial rise in the line of the graph is an example of population growth in a species as a result of B. an increase in food supply.
Why does food increase in a habitat?Seasonal changes, prey species mobility, a decrease in natural predators, an increase in prey species reproductive rates, and human activities such as farming and hunting can all cause food to increase in an environment.
Moreover, meteorological factors such as temperature, rainfall, and nutrient availability can influence plant growth and, as a result, herbivorous animal food availability.
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Match the descriptions below to the correct type of muscle.
spindle-shaped
attached to bones
voluntary
cells joined together by intercalated discs
not striated
found in heart
cells with many nuclei
Answers
The three types of muscles are skeletal, cardiac, and smooth muscles. Skeletal muscles are attached to bones, they are also voluntary, meaning they can be consciously controlled by the individual. They have cells that have many nuclei, making them multinucleated.
Cardiac muscles are found in the heart and their cells are joined together by intercalated discs. They are involuntary, meaning they cannot be consciously controlled. Smooth muscles are not striated, they are spindle-shaped, and also involuntary. They are found in various organs and tissues, such as the digestive system and blood vessels.
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Which of the following organisms would NOT be in the first tropic level of an energy pyramid? Responses dog tree gas
Answers
Answer:
dogs
Explanation:
I need help please
FORREST GUMP Discussion Response
What is the most important scene, shot or moment? How is this relevant to the film?
How did Forrest's participation is significant historical events affect his personal outlook on life (and extend to other characters around him)?
How did the CGI effects contribute to creating a believable environment?
Justify your response, citing SPECIFIC examples or scenes from the film.
Answers
The outsiders Project
1. How would the character’s
change to reflect teens today?
2. What would their hair and
clothing look like today?
3. What activities would they val‐
ue today that weren’t available in
the 1960s?
4. What details about the culture
(such as movies, movie stars,
cars, clothing, etc.) do teens
today think are important as op‐
posed to those in the novel?
5. What activities would the char‐
acters participate in today?
6. How would the characters
speak and act?
7. Who would be the greasers’
enemies and what would both
groups be called today rather
than “greasers” and “Socs”?
Answers
Based on the story titled "The Outsiders,"
1. To reflect todays teenagers, the character will likely have skills in technology, and will come from different cultural background. A bulk of their interaction will revolve around social media, and their groups will be larger in size.
2. The greasers will be influenced by older fashion. Like gothic themed fashion or cowboy influenced fashion. while the socs will have a more contemporary look like wavy hair that is mildly tinted, with skinny jeans, or wealthy vintage looks.
3. They would love online video games, and content creation for various online platforms
4. Teens today value the web and will therefore make out time for each other online than meeting everyday. They enjoy the media and will therefore love movies, anime and anything around online content.
5. They would participate in online betting games, video game competition, football worshipping and concerts where there are entrainments and drinks.
6. The socs will speak with eloquence and participate in rich people's things because they are ever conscious of their class. The greaser will have a lot of fun camping, touring places, learning hard skills. They would have colloquial terms that may be considered rude to others.
7. The greasers will be called the underdogs or revolutionists while the Socs will be seen as the elite or classist. The biggest enemy of the underdog will be both the elite and government.
What happens in the outsider?"The Outsider" is a novel by Stephen King. It tells about a teenager who was killed in a conflict by a greaser. The boys involved in the killing had to leave their family and flee so that they would not be arrested. The book gives us insight about their way of life.
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How many oxygen atoms are involved in the reaction below?
C6H12O6 + 602 6H₂O + 6CO₂
Answers
Explanation:
24 oxygen atoms are in the products of the reaction.
4. Hideki rolls up a paper towel and puts it in a straw. He puts one end of the straw in a glass of water and observes the movement of the water from the glass up the towel.
Which statement best describes what Hideki has made a model of?
A. It shows the pathway of water from the leaves of a plant to the stem.
B. It shows the pathway of water from the leaves of a plant to the roots.
C. It shows the pathway of water from the roots of a plant through the stem.
D. It shows the pathway of water from the roots of a plant directly to the leaves.
Answers
Which part of the brain is composed
of the frontal lobe, the parietal lobe,
the occipital lobe, and the temporal
lobe?
A. the brain stem
B. the cerebellum
C. the cerebrum
Answers
Answer: The cerebrum
Explanation:
The cerebrum consists of two cerebral hemispheres the outer layer called the cortex (gray matter) and the inner layer (white matter). There are four lobes in the cortex, the frontal lobe, parietal lobe, temporal lobe, occipital lobe.
PLEASE HELPPP!!!!!!
1) Use the following situation and tables to choose the correct answer.
Randomly sampled students from two high schools were asked what color the district should paint the new stadium. The results are presented in the following tables:
Stadium Color - North Valley High
Color: Survey Results:
silver 30
blue 54
teal 36
Stadium Color - South Hills High
Color: Survey Results:
silver 78
blue 24
teal 18
Make an inference comparing which color each of the two high school populations should choose for the stadium, based upon a qualitative comparison of the sampled data.
A.) North Valley High should choose silver to give the minority of the students who selected silver a win in the selection process. South Hills High should choose teal because a minority of their sampled students selected the color teal than other colors.
B.) North Valley High should choose blue because more of the sampled students selected the color blue compared to the other colors in the survey. South Hills High should choose silver because more of the sampled students selected the color silver than other colors.
C.) North Valley High should choose teal because that color was selected between the other two colors and would appeal to a broader base of students. South Hills High should choose blue in order to appeal to a broader base if its students.
Answers
North Valley High should select blue because more of the sampled students picked the color blue compared to the other colors in the survey. South Hills High should select silver because more of the sampled students picked the color silver than other colors.
This is the correct inference based on the given data. The survey results show that blue was the most popular color among the North Valley High students, and silver was the most popular color among the South Hills High students. Therefore, it would make sense for each high school to choose the color that was most popular among their respective student populations.
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A specific characteristics such as a seed color or plant height that varies from one individual to another
Answers
Answer:
Phenotype
Explanation:
Phenotype refers to an individual's observable traits, such as height, eye color and blood type.
A distinguishing feature of methanogens is that they
Answers
A distinguishing feature of methanogens is that they are microorganisms that produce methane as a byproduct of their metabolism.
Methanogens are archaea which is a group of single-celled microorganisms and are anaerobic, i.e. they can survive in environments with no oxygen. They obtain their energy by converting organic compounds into methane. These organisms are distinct from both other organisms, such as bacteria and eukaryotes.
Methanogens are found in a wide range of environments, including wetlands, the digestive tracts of ruminants, and deep sea sediments. They are also important microorganisms as they are used in producing methane which is further used as a source of renewable energy.
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Explain Phenomenon
You observe many
mushrooms growing in a circle. How many
organisms are you likely seeing? Explain.
Answers
The phenomenon of observing many mushrooms growing in a circle is known as a fairy ring or elf circle.
The number of mushrooms growing in the elf circle depends on the species of the mushroom.
What is an elf circle?Fairy rings, often referred to as elf rings or pixie rings, are circles composed of mushrooms that appear in nature.
Some mushrooms are small, while others can reach a diameter of 600 meters as they emerge from the earth in a circular pattern. One of the most wonderful places in the woods are fairy rings.
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Before Darwin's theories, scientists thought that species….
O never changed
O Changed over time
O Changed only randomly
Answers
Answer:
Never changed.
Explanation:
Before Darwin's theories, scientists thought that species never changed. This concept was commonly known as the doctrine of "fixity of species," which posited that species were immutable and remained unchanged since their creation. According to this belief, species were considered to be fixed entities with no potential for an evolutionary change or adaptation to their environment. This view was deeply entrenched in the prevailing scientific and religious beliefs of the time, and it was not until Darwin's groundbreaking work on natural selection and the theory of evolution that this long-held notion was challenged and replaced with the understanding that species do indeed change over time through the process of natural selection and other mechanisms of evolution.
some mice have inherited a genetic mutation that causes them to have a band of white fur around the middle of their bodies. what is most likely true about an ancestor of these mice?
Answers
If some mice have inherited a genetic mutation that causes them to have a band of white fur around the middle of their bodies, it is most likely that an ancestor of these mice also had the same genetic mutation that caused the band of white fur.
Genetic mutations are changes in DNA sequence that can be inherited by offspring from their parents. If a mutation passed down from the parent to its offspring, then next generations will also have the same mutations. The white fur band presence suggests that the mutation for this trait has been inherited through multiple generations of mice.
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