Briefly explain why earth has substantial atmosphere and stable climate today but our closest neighbouring planets do not
Answers
Related Questions
QUESTION 1 Exercise 11.10. Butterflies. Alice, Bob, and Charlotte are looking for butterflies. They look in three separate parts of a field, so that their probabilities of success do not affect each other. • Alice finds 1 butterfly with probability 17%, and otherwise does not find one • Bob finds 1 butterfly with probability 25%, and otherwise does not find one • Charlotte finds 1 butterfly with probability 45%, and otherwise does not find one Let X be the number of butterflies that they find altogether. Write X as the sum of three indicator random variables, X1, X2, X3 that indicate whether Alice, Bob, Charlotte (respectively) found a butterfly. Then X= X1+X2 +X3. Find the expected value of X by finding the expected value of the sum of the indicator random variables. Your answer will have two decimal places. **This is a straight forward expected value of a sum of random variables, nothing fancy here! QUESTION 2 Exercise 11.16. Flipping coins. Flip a coin until the second head comes up. Let X be the number of flips needed to get the second head. What is the E(X). The first step is to find the expected value of getting the first head. Is this like Example 11.10, sampling without replacement, OR like Example 11.11, sampling with replacement? O A. Example 11.10, sampling without replacement O B. Example 11.11, sampling with replacement QUESTION 3 Exercise 11.16. Flipping coins. Flip a coin until the second head comes up. Let X be the number of flips needed to get the second head. What is the E(X). The first step is to find the expected value of getting the first head. What is the expected value of getting the first head? This will be an integer answer. QUESTION 4 Exercise 11.16. Flipping coins. Flip a coin until the second head comes up. Let X be the number of flips needed to get the second head. What is the E(X). The next step is to find the expected value of getting the second head. Because this is identical to finding the expected number of rolls for the first head (independent events), we just multiply the first head's expected value by 2. This will be an integer answer. QUESTION 5 Exercise 11.17 (a). Waiting for favorite song. Michael puts his iTunes on shuffle mode where songs are not allowed to be replayed. He has 2,781 songs saved on iTunes, and exactly one of these is his favorite. How many songs is he expected to have to listen to until his very favorite song comes up? Is this like Example 11.10, sampling without replacement, OR like Example 11.11, sampling with replacement? A. Example 11.11, sampling with replacement B. Example 11.10, sampling without replacement
Answers
In Exercise 11.10, the expected value of the number of butterflies found by Alice, Bob, and Charlotte is obtained by finding the expected value of the sum of three indicator random variables.
In Exercise 11.16, the expected value of the number of flips needed to get the second head in a coin flipping experiment is determined. These exercises involve different scenarios of sampling with and without replacement.
In Exercise 11.10, the expected value of X, the total number of butterflies found, is found by calculating the expected value of each indicator random variable (X1, X2, X3) representing whether Alice, Bob, and Charlotte found a butterfly, respectively.
The expected value of each indicator variable can be obtained by multiplying the probability of success (finding a butterfly) by 1 and the probability of failure (not finding a butterfly) by 0. Then, the expected value of X is calculated as the sum of the expected values of the indicator variables.
In Exercise 11.16, the expected value of X, the number of flips needed to get the second head, is determined. To find this value, we first need to find the expected value of getting the first head. This scenario is similar to Example 11.11, which involves sampling with replacement.
Each coin flip is an independent event, and the probability of getting a head is constant at 0.5.
Therefore, the expected value of getting the first head is 1/p, where p is the probability of success (0.5 in this case).
In Exercise 11.17 (a), the scenario of waiting for a favorite song in Michael's iTunes playlist involves sampling without replacement. Each song played is not replayed, and there is only one favorite song among the total number of songs.
Therefore, this scenario is similar to Example 11.10, sampling without replacement.
To find the expected number of songs Michael needs to listen to until his favorite song comes up, the formula for sampling without replacement is used, which is the reciprocal of the probability of selecting the favorite song at each step.
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Which two organelles assist in the process of phagocytosis when a white blood cell engulfs a foreign invader?
A. Vacuole and ribosome
B. Lysosome and chloroplast
C. Mitochondria and cell membrane
D. Vacuole and lysosome
Answers
Which of the following is an abiotic factor or an ecosystem? select one: a. minerals in the soil b. microorganisms in the soil c. vertebrates in a stream d. all of the above
Answers
Abiotic factors are essential for the functioning and survival of organisms within the ecosystem. The abiotic factor in an ecosystem among the given options is (a) minerals in the soil.
Abiotic factors are non-living components of an ecosystem that influence the organisms living within it. They include physical and chemical factors such as temperature, sunlight, water availability, soil composition, and minerals. In this case, minerals in the soil are abiotic factors because they are non-living components that directly impact the ecosystem.
Microorganisms in the soil and vertebrates in a stream, on the other hand, are biotic factors. Biotic factors refer to the living organisms within an ecosystem, including plants, animals, fungi, and microorganisms. Microorganisms in the soil contribute to nutrient cycling and decomposition processes, while vertebrates in a stream are living organisms that interact with other biotic components of the ecosystem.
Therefore, the correct answer is a. minerals in the soil, as it represents an abiotic factor within an ecosystem.
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The u.s. integrated ocean observing system (ioos) is a government program to collect information in the gulf of mexico. please select the best answer from the choices provided
true
false
Answers
The statement "The U.S. Integrated Ocean Observing System (IOOS) is a government program to collect information in the Gulf of Mexico" is true.
The IOOS is a national ocean observing program that was established to provide a comprehensive and coordinated approach to collecting and disseminating information about the ocean and coastal waters in the United States.
The program collects data from a variety of sources, including satellites, buoys, ships, and coastal observing stations, and provides access to this information to a wide range of users, including government agencies, researchers, and the public.
One of the main focuses of the IOOS is the Gulf of Mexico, where the program works to collect data on a variety of topics, including water temperature, ocean currents, water quality, and marine biology. The information collected by the IOOS helps to improve our understanding of the Gulf of Mexico and the processes that occur in this important body of water.
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How many species of organisms are estimated to inhabit the Earth
Answers
Answer:
8.7 million
Explanation:
About 8.7 million (give or take 1.3 million) is the new, estimated total number of species on Earth -- the most precise calculation ever offered -- with 6.5 million species on land and 2.2 million in oceans.
Answer:
8.7 million
Explanation:
its the estimated value there isn't much more to explain
¿CÓMO FUNCIONA LA EVOLUCIÓN?
Answers
Answer:
Spanish: La evolución es el proceso por el cual los organismos actuales se han descendido a partir de antepasados antiguos. ... La variabilidad genética es una parte fundamental del proceso, ya que la evolución se produce cuando fuerzas selectivas actúan sobre esa variabilidad.
English: Evolution is the process by which current organisms have been descended from ancient ancestors. ... Genetic variability is a fundamental part of the process, since evolution occurs when selective forces act on that variability.
Explanation:
When you were born you were 22 inches long now you were about 60+ inches long how do you account for this 40+ inches of growth?
Answers
Based on what you learned in PBS, what are three foods that would be considered good energy sources? Explain your choices. Bean, nuts, and green vegetables are considered good energy sources. They are high in fiber and low on the glycemic index.
Answers
Based on PBS, the three foods that would be considered good energy sources is bean, nuts, and green vegetables, these foods are recommended as they are high in fiber and low on the glycemic index that increase energy levels.
They are perfect for maintaining energy levels throughout the day without any sudden crashes. Basically, the glycemic index is a scale that ranks foods based on the impact they have on blood sugar levels. Foods that are high on the glycemic index are quickly digested and can cause a rapid increase in blood sugar levels followed by a quick crash. Nuts and beans are low on the glycemic index, and they contain healthy fats and protein, which provide long-lasting energy.
Green vegetables such as spinach, kale, and broccoli are high in nutrients such as iron, which is essential for carrying oxygen to the muscles. This makes them a great source of energy as they help maintain healthy blood flow, reduce inflammation and provide natural fuel to the body. In conclusion, incorporating beans, nuts, and green vegetables into your daily diet is an excellent way to increase energy levels. They provide lasting energy without sudden crashes and are nutrient-dense.
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1. What organism that does
cellular respiration will you
include in your aquaponics
system
Answers
Answer:
Fish, Tilapia
Explanation:
Fish can live in the water tank
it releases carbon dioxide , which plants need for photosynthesis
ammonia from fish can also act as fertilizer for plant
If u want specific species, tilapia
can adapt to environment and withstand less than ideal water conditions
resistant to many pathogens and parasites
blood pressure plays a major role in returning venous blood to the heart.true or false
Answers
The statement "Blood pressure plays a major role in returning venous blood to the heart" is false because venous blood flow is primarily driven by mechanisms other than blood pressure.
Unlike arterial blood flow, which is propelled by the pumping action of the heart, venous blood flow relies on a combination of factors such as skeletal muscle contractions, one-way valves within veins, and respiratory movements.
The contraction of skeletal muscles, particularly in the legs, acts as a pump, squeezing the veins and propelling blood towards the heart. The presence of one-way valves within veins prevents backward flow, ensuring blood moves in the desired direction. Additionally, the pressure changes that occur during breathing, specifically inhalation, create a pressure gradient that assists in venous return, the statement is false.
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discuss the harmful implications of drug abuse , on body on behaviour ,and in social interactions .
Answers
Mental illness and addiction to drugs which has negative influences on the behaviour of a person
While in social interaction
Drug abuse can cause mental disorder which can also affect someone’s speech and way of thinking and this will eventually cause people to isolate him or her
Based on the arrow shown, in which hemisphere would you find this motion? How do you know? Make sure to answer the question in a complete sentence
Answers
In clockwise hemisphere would you find this motion. As shown in picture the arrow is facing toward the south to north east direction.
In which direction earth rotates?Earth rotation direction is west to east, that appears counterclockwise when viewed from above the North Pole.
Any circle drawn around the earth divides it into two equal halves called hemispheres. There are four hemisphere northern, southern, western, eastern hemisphere on the earth.
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What type of temperatures will the enzyme shown in Graph (a) work best?
Answers
Abiotic factors are all the living parts of an ecosystem.
True
False
Answers
answer - false
The graph shows carrying capacity in two different areas for two populations
of salmon. Which statement below is most likely true about these areas?
Number of Individuals
35
30
25
20
15
10
123456789101112131415
Time
Area A
-Area 8
OA. Salmon fishing occurs in Area B but not in Area A.
O
D
Jun 20
Answers
Answer:
Area A has more food resources than area B.
Explanation:
Carrying capacity refers to the maximum population size that a habitat can support as per its available resources such as food, space etc. According to the given graph, the carrying capacity of area "A" is higher than that of area "B" since area "A" supports larger population size of salmon than area B. The higher carrying capacity of area A could be due to presence of more food resources in the region to support the larger population size.
true or false some substances can diffuse directly through the cell membrane without the aid of a transport protein.
Answers
Answer:
True.
Explanation:
True, some substances can diffuse directly through the cell membrane without the aid of a transport protein.
The given statement " some substances can diffuse directly through the cell membrane without the aid of a transport protein" is true.
Some small, non-polar molecules such as oxygen, carbon dioxide, and water can diffuse directly through the cell membrane without the aid of a transport protein. This is because the cell membrane is composed of a phospholipid bilayer, which allows for the diffusion of small, non-polar molecules through the hydrophobic interior of the membrane.
However, larger or polar molecules, such as glucose or ions, typically require the aid of transport proteins to cross the cell membrane, either through facilitated diffusion or active transport.
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Question 8
1 pts
Which of the following is not an example of Homeostasis?
a. A balanced blood pH
b. Extremely high blood c. glucose levels
c. Sweating when hot
d. Shivering when cold
Question 9
1 pts
Answers
Task 2:
The sizes of boiled eggs were measured before and after they were placed in two
different solutions. Egg A was 125 mm in diameter before being placed in pure
water. It swelled up and increased in size to 180 mm. Egg B shrank from 130 mm
to 100 mm after being placed in a salty solution.
(12 marks)
You must put this information in a table with detailed headings.
Answers
Data tables are used to summarize data recorded during an experiment.
The information provided here involves the type of egg, difference in size before and after being placed in the solution, the type of solution, and how the egg size changed. The table is attached.
What is a data table?
Data tables are representations of data collected during an experiment.
Tables are organized in rows and columns, which resume significant information, making them easy to understand and interpret.
Together graphs and charts are used to express the results of different experiments, to make them more comprehensive to the lector.
In the exposed example, data includes
Egg (A and B)Measure before and after being placed in the solution Solution ( pure water and salty solution)Change (swell - shrank)You will find the table in the attached files
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9. A scientist is studying a group of rabbits in a field. Which three factors impact the ecosystem's carrying capacity for rabbits? (LS2.1 - 3 points)
A. types of rocks in the environment
B. total amount of food available
C. total habitat available
D. change in temperature from spring to fall
E. number of water sources present
A student claims that a persistent drought or humid conditions will change the plant community in a forest ecosystem. Which statement supports the claim?
A. Drought increases the nutrient content in the soil, which favors the growth of fast-growing trees.
B. Drought reduces the nutrient content in the soil, which favors the growth of slow-growing trees.
C. Humid conditions reduce the nutrient content in the soil, which favors the growth of fast-growing trees.
D. Humid conditions increase the nutrient content in the soil, which favors the growth of slow-growing trees.
Answers
Answer: D.
Explanation:
D. Humid conditions increase the nutrient content in the soil, which favors the growth of slow-growing trees.
Humid conditions are favorable to slow-growing trees because they create an environment with more available water and nutrients, allowing these trees to thrive. Additionally, humid conditions can reduce the rate of evaporation in the soil, allowing more moisture to remain in the environment and providing more resources for the growth of slow-growing trees.
Androgens are hormones that promote the development of ________ characteristics.
Answers
Androgens are hormones that promote the development of male characteristics.
What are Hormones?
These are chemical messengers which are secreted into the blood for different functions in the body.
Androgens are sex hormones which are involved in the development of the male reproductive system.
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Which plant hormone(s) increases leaf size
Answers
Answer:
Gibberellin
Explanation:
I've studied that gibberellin is a plant hormone that promotes cell elongation and division, causing the cells in the leaves to elongate and divide more, this leads to an increase in leaf size.
Hope it helps! :)
The plant hormone that helps in increasing the leaf size is the phytohormone Auxin .
Plants create signalling molecules called plant hormones, which are found in low concentration. All plant's growth and progression are regulated by plant hormones.
There are basically five types of plant hormones that are considered to be essential for plant growth . They are Auxin , Cytokinin , Gibberellin , ABA , Ethylene .
The Cytokinin and Auxin work together to enhance the development of leaf as both of the phytohormones are responsible to modulate the growth of leaf as well as controlling the cell cycle . These hormones are considered essential for plant growth and it occur naturally at various concentrations within plants throughout the duration .
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(b) identify whether morphological data or amino acid sequence data are more likely to accurately represent the true evolutionary relationships among the species, and provide reasoning for your answer.
Answers
Amino acid sequence data is more likely to accurately represent the true evolutionary relationships among species.
This is because amino acid sequences directly reflect the genetic information encoded in DNA, providing a more precise and objective measure of evolutionary relationships. Morphological data, on the other hand, can be influenced by factors such as environmental adaptations and convergent evolution, which may lead to misleading interpretations of species relationships. Therefore, amino acid sequence data is a more reliable and accurate method for determining evolutionary relationships among species.
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What is being tested?
A.)How does the amount of water given to a plant per day affect the plant.
B.)How does the amount of water given to a plant per day affect the height of the plant.
C.)How does the number of times l water a plant affect the height of the plant.
Answers
Answer: is c
Explanation:
Gastropods (snails) have a single, whorled shell. If the apex (tip) is pointing up and the opening is to the left, this is known as a condition. (1 pt) a. axial b. dextral c. vertical d. Sinistral 37. What is meant by "regular" when discussing echinoids? (1 pt) a. preferred direction of travel b. the normal condition c. no preferred direction of travel d. a slight bi-lateral symmetry 38. Oysters are bivalves, like clams, but differ from them in all the following ways except what? (1 pt) a. asymmetrical, different size shells b. sessile lifestyle (they do not move) c. have calcite shells d. have two shells 39. What do we suspect is the ultimate cause of the mass extinction at the end of the Cretaceous period? (1 pt) 9. climate change - volcanism meteorite impact - plate tectonics
Answers
Gastropods (snails) have a single, whorled shell. If the apex (tip) is pointing up and the opening is to the left, this is known as a sinistral condition. In discussing echinoids, "regular" means there is no preferred direction of travel. Oysters are bivalves, like clams, but differ from them in having asymmetrical, different size shells and having calcite shells.
The ultimate cause of the mass extinction at the end of the Cretaceous period is suspected to be a meteorite impact. The condition in which Gastropods (snails) have a single, whorled shell with the apex pointing up and the opening to the left is known as a sinistral condition.
Echinoids are regular when there is no preferred direction of travel. They have a spherical or disk-shaped internal skeleton known as a test and spines that are mobile. Their test is made up of numerous plates, which in turn are covered in tubercles and pincers. Oysters differ from clams in having asymmetrical, different size shells and having calcite shells.
They are sessile animals that do not move around the seafloor but rather attach themselves to rocks or other hard surfaces. A meteorite impact is suspected to be the ultimate cause of the mass extinction at the end of the Cretaceous period. The impact produced shock waves that generated tsunamis, earthquakes, and firestorms. The ejected dust and debris from the impact site resulted in global darkness and cooling of the Earth's atmosphere.
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The chemical signals that travel from one neuron to another, enabling them to communicate with one another, are called:
Answers
Answer:
The chemical signal is called a neurotransmitter. Neurotransmitters allow the billions of neurons in the nervous system to communicate with one another.
Explanation:
What piece of equipment helped scientists to discover cells?
A. The microscope
B. Glasses
C. The monocle
D. The telescope
Answers
Answer:
im pretty sure the answer is A
The telescope , a tool, helped discover evidence to support the Big Bang. Thus, option D is correct.
The term “evidence” refers to the proper form of proof that supports a claim. Newspaper articles, historical papers, footprints, signatures, internet sources, files, paperwork, films, medical reports, photographs, and voice recordings are a few examples of the various types of evidence.
According to the evidence and supporting evidence, the galaxy was the distance from Earth. The microwave background radiation and the cosmic background radiation. The 1960s saw the discovery of radiographs.
Therefore, option (d) is correct.
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How is an enzyme related to its substrate?
Answers
Answer:
An enzyme will interact with only one type of substance or group of substances, called the substrate, to catalyze a certain kind of reaction. Because of this specificity, enzymes often have been named by adding the suffix “-ase” to the substrate's name (as in urease, which catalyzes the breakdown of urea
Explanation:
it binds its substrate
what type of dna is used in genetic engineering and has the advantage of being free of intervening sequences known as introns?
Answers
The type of DNA used in genetic engineering that has the advantage of being free of intervening sequences known as introns is called cDNA (complementary DNA).
cDNA is synthesized from mRNA (messenger RNA) using the enzyme reverse transcriptase. This process involves using the mRNA as a template to synthesize a complementary DNA strand, which is then used as a template to synthesize a double-stranded cDNA molecule. This cDNA molecule is then used in genetic engineering applications.
One of the advantages of using cDNA in genetic engineering is that it lacks introns, which are non-coding regions of DNA that are present in the genomic DNA. Since introns do not code for proteins, they can be a hindrance in gene expression studies. cDNA allows researchers to study only the coding regions of a gene, which can simplify the analysis of gene expression.
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How can ocean pollution be controlled?
Answers
Answer:
You could start a group and pick up trash from the ocean and inform people that if we throw trash in the ocean sea animals can die and the ocean will be dirty and one day we will have no water left to drink if all water is dirty
Explanation:
No explanation
(05. 01 MC)
Recent molecular evidence suggests that the ancestors of the Aboriginal Australians may have arrived on that continent much earlier than originally thought, suggesting that there may have been two waves of human migration out of Africa instead of only one. What is the best next step for scientists considering this alternative explanation? (2 points)
Answer Choices:
Look for fossil evidence that might support this explanation. Determine the amount of popular support for the theory. Convince the scientific community the new explanation is true. Assume the molecular evidence is wrong since it does not fit with what is known
Answers
Given the statement, "Recent molecular evidence suggests that the ancestors of the Aboriginal Australians may have arrived on that continent much earlier than originally thought, suggesting that there may have been two waves of human migration out of Africa instead of only one," the best next step for scientists considering this alternative explanation would be to look for fossil evidence that might support this explanation.
An explanation for the same is given below: As per the given statement, the ancestors of the Aboriginal Australians may have arrived on that continent much earlier than originally thought, suggesting that there may have been two waves of human migration out of Africa instead of only one.
Since this is an alternative explanation for what is already known, the best next step for scientists is to look for fossil evidence that might support this explanation. They need to find and analyze fossils of those early humans, which would provide evidence for this alternative theory.
In addition, it would also be essential to test the molecular evidence further and conduct more research to find any possible inconsistencies. This could provide scientists with a more in-depth understanding of how early humans migrated from Africa to different parts of the world. Thus, the best option would be to look for fossil evidence that might support this explanation.
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