about how many different living things are on earth?
Answers
There are about 8.7 million plant and animal species in the world, according to scientists. However only about 1.2 million species, the most of which are insects, have been named and described thus far.
As a result, the existence of millions of different creatures is still completely unknown.
The term "biodiversity" refers to the range of living organisms, including bacteria, fungi, animals, and plants, that exist on Earth. Even though the diversity of life on Earth is so great that many species are still unknown, human actions are threatening the extinction of countless species, endangering the planet's incredible biodiversity. To survive and preserve their habitats, all of the species on Earth cooperate.
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Related Questions
what part of the leaf is responsible for absorbing suns energy
Answers
Answer:
Explanation:
chlorophyll
Answer: All of the leaf, but only the chemical chlorophyll is able to convert the sunlight it absorbs into sugar.
Explanation:
Most, if not all, accidents are cause by:
Group of answer choices
human error
bad equipment
electrical issues
bad luck
Answers
9.
Scientists break down evolution into which two categories?
- macroevolution and genetic drift
- microevolution and mass. extinction
-natural selection and macroevolution
-microevolution and macroevolution
Answers
Natural selection and macroevolution
Hope this helps :)
What is skepticism?
a new scientific idea
being interested in new or different ideas
a general agreement among scientists about a scientific idea
the understanding that knowledge in a particular area can be uncertain
Answers
An attitude of skepticism or a tendency to be skeptical, either generally or with regard to a certain object.
What is skepticism and why is it important?In order to be skeptical, one must refrain from leaping to conclusions when examining a claim or an explanation. In the course of a study, it enables scientists to take into account every scenario and rigorously examine all available data.Doubt, dubiety, mistrust, suspicion, and uncertainty are some typical synonyms for skepticism. While all of these terms refer to a "lack of sureness about someone or something," scepticism denotes a refusal to accept something without concrete proof.A sceptic is someone who thinks that some or all of human knowledge is illogical. Skeptics contend that it is preferable to suspend believing rather than rely on the disputed byproducts of reason because even our finest methods for learning about the universe occasionally fall short of full certainty.To learn more about skepticism refer to:
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Answer:
D
Explanation:
The understanding that knowledge in a particular area can be uncertain
Time-Resolved Proteome Analysis of Listeria monocytogenes during Infection Reveals the Role of the AAA Chaperone ClpC for Host Cell Adaptation
Answers
Listeria monocytogenes infection time-resolved proteome analysis indicates the function of the AAA+ chaperone ClpC in host cell adaptability. The set of expressed proteins at a given time, known as the cellular proteome, determines an organism's phenotype under particular circumstances.
What is Listeria monocytogenes?The pathogenic bacterial species that causes listeriosis is listeria monocytogenes. It is a facultative anaerobic bacterium, meaning it can live with or without oxygen. One of the most dangerous foodborne infections, it may grow and multiply inside the host's cells: High-risk individuals may develop fatal foodborne listeriosis illnesses in 20 to 30 percent of cases.
What conditions are associated with Listeria monocytogenes?monocytogenes listeria in the US, L. monocytogenes accounts for 2% to 8% of cases of bacterial meningitis and has a fatality rate of 15% to 29%. 48–51 Up to 80% of meningitis cases brought on by this pathogen have been linked to serotypes 1/2b and 4b.
How does listeriosis commonly infect patients?Listeriosis is a dangerous infection that is frequently brought on by eating contaminated food or by a newborn's potentially fatal sickness. Symptoms in non-pregnant patients frequently include headache.
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the table shows the frequencies of an allele (a) at a locus and the average number of offspring produced for carriers of that allele at each frequency. in these haploid populations, the average number of offspring produced by bearers of the other allele (a) is always 1.8, regardless of the frequency of the alleles. in which population can both alleles be maintained?
Answers
Based on the information provided, the population in which both alleles can be maintained is the one where the average number of offspring produced by carriers of the "a" allele is equal to or greater than 1.8, regardless of the frequency of the alleles.
In other words, if the average number of offspring produced by carriers of the "a" allele is less than 1.8, the "a" allele is likely to be lost over time due to natural selection.
It seems that you haven't provided the actual table showing the frequencies and average offspring for allele (a). However, I can still explain the concept to help you understand how to determine if both alleles can be maintained in a population.
In order for both alleles (a) and (A) to be maintained in a population, they must have a similar fitness, which means their average number of offspring produced must be close. In your question, you mentioned that the average number of offspring produced by bearers of allele (A) is always 1.8, regardless of the frequency of the alleles.
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Which organisms in this food web have a Producer/Consumer
Relationship?
Answers
Answer:
what food web?
Explanation:
What conclusion from the study of Mesopotamia can be used in irrigation practices today?
A.Continuous irrigation is a good thing.
B.Irrigation methods with the least impact on the water table may be beneficial.
C.Irrigation should not be used in hot climates,
D.Farming should not be done in hot climates.
Answers
Answer:B
Explanation:
Mesopotamia has been the Western Asian region that is known for early civilization. The method that has the least impact on the water table is the best irrigation method. Thus, option B is correct.
What are Mesopotamian irrigation practices?Mesopotamian irrigation practices have been the use of canals and shadufs for direct use in agricultural fields. They irrigated their land by digging holes and storing the water. They also built canals and connected them to the ditches.
For modern practices, the Mesopotamian irrigation system is a model as it defines the best irrigation method to be the one that has the least impact on the water content and table.
Therefore, option B. the best irrigation method is that uses the eater most efficiently and does not negatively impact the water table.
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Write a short paragraph that explains the central idea of the article. Use at least two details from the article to support your response.
Dozens of earthquakes hit Hawaii as the world's largest volcano erupts
On November 27, Mauna Loa erupted for the first time in nearly 40 years. Located in Hawaii, Mauna Loa is the world's largest active volcano. Volcanoes are openings or vents where lava, small rocks, and steam erupt onto the Earth's surface. Melted rock that comes up from inside the Earth and out of a volcano is lava. The Mauna Loa eruption occurred at the Moku'āweoweo summit caldera. This is a large sunken basin at the summit — or highest point — of the volcano.
Following the eruption, dozens of earthquakes swarmed the region — one of them a magnitude 4.2 quake. Magnitude is a number that characterizes the relative size of an earthquake from 1 to 9.
Remain Vigilant
Officials issued an ashfall advisory for Hawaii's Big Island and asked residents to remain vigilant. So far the eruption's lava flows pose no risk to people living downhill from the eruption, according to Hawaii's Tourism Agency.
Map showing lava flow of Mauna Loa from the years 1843 to 1984.
Image 1. The volcano's last eruption was in 1984, when it sent a lava flow close to the city of Hilo.
"At this time, lava flows are contained within the summit area and are not threatening downslope communities," said officials from the U.S. Geological Survey (USGS). The USGS is a government agency that collects information to help monitor natural hazards such as earthquakes. They warned, however, that the location and advance of lava flows can change rapidly.
The USGS's Hawaiian Volcano Observatory noted that it is set to perform flights to assess the eruption. They warned that "winds may carry volcanic gas and possibly fine ash and Pele's hair downwind." Pele's hair are thin strands of volcanic glass formed from cooling lava. The glass is sometimes carried into the air by strong winds and is sharp enough to tear skin and eyes.
Monitoring The Volcano
Mauna Loa takes up more than half of Hawaii's Big Island. It rises 13,679 feet (4,169 meters) above the Pacific Ocean, according to the USGS. The volcano is fairly active, having erupted 33 times since its first well-documented eruption in 1843. Its last eruption was in 1984 when it sent a lava flow close to the city of Hilo. After that, Mauna Loa entered its longest dormant period in recorded history. Periods of time when the volcano is not erupting, but could in the future, are volcanic dormant periods.
Scientists tracked an uptick in earthquake frequency beginning in June with five to 10 earthquakes a day. By September, the warning signs of an eruption increased. The number of earthquakes grew to around 40 a day in October.
Answers
The central idea that the text has is that it tells us of the fact that the scientists were talking about the eruption as a way of sending out warning to the people.
The parts that agree with this are: By September, the warning signs of an eruption increased. Officials issued an ashfall advisory for Hawaii's Big Island and asked residents to remain vigilant
What is the central idea of a passage?The most significant thought that the author wishes to convey to the reader is the key theme of a passage or story. It is possible to state the main notion immediately. The main idea is stated by the author.
The key thought or concept that the author wishes to convey to the readers about the subject is the main idea of a paragraph.
The main premise of the text is that it informs us of the fact that experts were discussing the eruption as a means of alerting the public.
The following passages support this: By September, there were more eruption warning indicators.
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can someone help me with this? I've been on online instruction for a really long time
Answers
Yes, I can help you with this a food chain is a linear sequence of organisms through which nutrients and energy pass as one organism eats another.
Every food chain begins with a producer. The food chain shown below uses arrows to show the transfer of energy and nutrients, which is always from the consumed to the eater.
An ecosystem's only conduit for the flow of matter and energy is represented by a food chain. An essential conceptual tool for depicting the feeding connections among species within a group is the food web.
All the interconnected and overlapping food systems in an ecosystem are combined to form a food web. The linkages or interconnections between objects are described by food webs. Energy is transferred between the species in food webs from producers to consumers. Energy is used by organisms to carry out demanding tasks.
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Why is the plasma membrane selective?
so water cannot enter or exit the cell
so waste products do not enter the cell
so lipid-soluble molecules do not enter or exit the plasma membrane unassisted
so large molecules can pass through the plasma membrane unassisted
Answers
Hope this helps so sorry in advance if it’s wrong but hope it helps
Answer:
C
Explanation:
EDGE2021
Which example is a trait of a index fossil
Answers
Answer: Brachiopods
Explanation:
they emerged 550 million years ago
During anaerobic conditions... (Select all that apply) a. Pyruvate Dehydrogenase Accelerates.
b. Lactate dehydrogenase begins to function.
c. NADP+ is consumed. d. Glycolysis risks failing due to lack of a key metabolite.
Answers
Option d is also correct.
During anaerobic conditions, lactate dehydrogenase begins to function. Pyruvate dehydrogenase accelerates as well as Glycolysis risks failing due to the lack of a key metabolite. NADP+ is not consumed but NADH is produced when pyruvate is reduced to lactate. Thus, option a is incorrect, and option b and d are correct. Additionally, the metabolism of the cell is highly regulated by different mechanisms. When the cells do not have sufficient oxygen, they rely on the anaerobic metabolic pathway, which has a lower efficiency as compared to the aerobic metabolic pathway.
In anaerobic conditions, the pyruvate formed by glycolysis is transformed into lactate rather than acetyl-CoA, leading to the production of lactic acid. The process of conversion of pyruvate to lactate is catalyzed by the lactate dehydrogenase enzyme. This enzyme utilizes NADH as a hydrogen acceptor and helps regenerate NAD+, which is essential to maintain the continuity of the glycolytic process. Additionally, under anaerobic conditions, the cells face a shortage of oxygen, leading to the accumulation of NADH.
The excess of NADH inhibits the glycolytic pathway by inhibiting the enzyme pyruvate dehydrogenase. This enzyme is responsible for converting pyruvate to acetyl-CoA, which helps drive the aerobic metabolism of the cells. Therefore, the inhibition of pyruvate dehydrogenase leads to the accumulation of pyruvate, which may ultimately lead to the failure of the glycolytic process. Thus, option d is also correct.
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what is a possible explanation for why a population may not be in hardy-weinberg equilibrium?
Answers
A population may not be in Hardy-Weinberg equilibrium for a variety of reasons. One potential explanation is random genetic drift, which occurs when the genetic makeup of a population changes due to chance events.
If alleles appear or disappear at random, due to a genetic sampling effect or random mating, then the overall gene frequencies in the population will change, leading to a deviation from Hardy-Weinberg equilibrium. Additionally, mutations or other sources of genetic variability can also cause the population to deviate from equilibrium.
Finally, natural selection can cause genetic differences to occur between individuals in a population, leading to a deviation from Hardy-Weinberg equilibrium. If a particular adaptively advantageous trait confers a reproductive advantage upon an organism, then that trait may become more common in the population over time, leading to a deviation from the Hardy-Weinberg equilibrium.
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5.)
Which of the following is a body processes controlled by hormones?
Answers
Answer:
function are metabolism,homeostasis,growth, sexual activity and cardiac muscle
Explanation:
what is the essence of setting up experiments in replicates?
Answers
Answer: Importance of replication in experiments
Explanation: Getting the same result when an experiment is repeated is called replication. ... Replication is important in science so scientists can “check their work.” The result of an investigation is not likely to be well accepted unless the investigation is repeated many times and the same result is always obtained.
please help me i don’t know nun of this
Answers
Answer:
A and A
Explanation:
Answer:
idek
Explanation:
Points and an easy question.
What organism is in this fossil?
Answers
Answer:
I think this is an amonite but I might be wrong sorry
Explanation:
I was wrong it is a Trilobite
What are the importance of the major organ of the human body?
Answers
Answer:
Humans have five vital organs that are essential for survival. These are the brain, heart, kidneys, liver and lungs. The human brain is the body's control center, receiving and sending signals to other organs through the nervous system and through secreted hormones.
Answer:
Major Organs of The Human Body
Explanation:
Humans have five vital organs that are essential for survival. These are the brain, heart, kidneys, liver and lungs. The human brain is the body's control center, receiving and sending signals to other organs through the nervous system and through secreted hormones.
1. heart
The heart is at the center of your circulatory system, which is a network of blood vessels that delivers blood to every part of your body. Blood carries oxygen and other important nutrients that all body organs need to stay healthy and to work properly.
2.Brain
The brain is arguably the most important organ in the human body. It controls and coordinates actions and reactions, allows us to think and feel, and enables us to have memories and feelings—all the things that make us human.
3. kidneys
Your kidneys remove wastes and extra fluid from your body. Your kidneys also remove acid that is produced by the cells of your body and maintain a healthy balance of water, salts, and minerals—such as sodium, calcium, phosphorus, and potassium—in your blood.
4.liver
All the blood leaving the stomach and intestines passes through the liver. The liver processes this blood and breaks down, balances, and creates the nutrients and also metabolizes drugs into forms that are easier to use for the rest of the body or that are nontoxic.
5. lungs
Every cell in your body needs oxygen in order to live. The air we breathe contains oxygen and other gases. Once in the lungs, oxygen is moved into the bloodstream and carried through your body.
Hope its helpful
Pls mark as brainliest.
i’ll mark brainliest
Answers
Answer:
1) Different
2) Different
3) The same
4) The same
Please don't forget to mark me brainliest!!!
place the statements to their correct category to distinguish between the various types of hepatitis virus infection.
Answers
The placement of the statements to their correct category to distinguish between the various types of hepatitis virus infection:
1. Transmission through blood contact, body fluids, sexual activity; also vertical transmission: Hepatitis B
2. Outbreaks linked to unhygienic food handling, eating shellfish, or traveling to developing countries: Hepatitis A or E.
3. Treatment is with direct-acting antivirals which cure in majority of cases: Hepatitis A or E.
4. The incubation period is 10-15 weeks; can lead to chronic infections and cirrhosis or liver cancer: Hepatitis B, Hepatitis C.
5. Generally asymptomatic in acute stage but in many cases infection becomes chronic: Hepatitis B
6. Fecal-oral transmission or vehicle transmission: Hepatitis A or E.
7. Caused by non-oncogenic RNA viruses exhibiting low virulence: Hepatitis A or E.
8. Treatment involves interferon and sometimes RT inhibitors; recombinant vaccine available: Hepatitis B, Hepatitis C.
9. Transmission through blood contact, although mechanism of exposure not always obvious Hepatitis B.
Hepatitis is defined as inflammation of the liver that can result from a variety of causes such as heavy alcohol use, autoimmune, drugs, or toxins. However, the most frequent cause of hepatitis is due to a viral infection which is referred to as viral hepatitis. In the United States, the most common types of viral hepatitis are Hepatitis A, Hepatitis B, and Hepatitis C. The other types of viral hepatitis are hepatitis D and E which are less frequently encountered.
Your question is incomplete, but most probably your full question can be seen in the Attachment.
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1. Refer to the data in Model 1.
Flow many males are taller than 175 cm and approximately what percentage is
that?
Answers
Answer:
11 males, 25%
Explanation:
Eleven of the 44 males in this study are taller than 175 centimetres, which makes it one fourth of the total that is 25%. See below:
simplify the fraction \(\frac{11}{44}\)
= \(\frac{1}{4}\) now multiply it by 100 to convert to a percentage value.
= 25%
Answer:
The correct answer is 10 and this is 50%
Explanation:
Food production in a ecosystem service. explain how human activities are affecting the ecosystem service
Answers
Human activities are significantly impacting the ecosystem service of food production. While some of these impacts have been positive, many have been negative. It is important to carefully consider the potential ecological consequences of our food production practices to ensure sustainable food production for future generations.
What are the positive impacts of humans on ecosystem service?On the positive side, humans have developed various technologies and practices to increase food production. For example, selective breeding, genetic engineering, and modern agricultural practices such as crop rotation and irrigation have significantly increased crop yields and helped to feed a growing global population.
What are the negative impacts of humans on ecosystem service?Human activities have also caused significant harm to ecosystems and the services they provide, including food production. Deforestation, overfishing, and the use of pesticides and fertilizers have led to soil erosion, water pollution, and the loss of biodiversity. Climate change is also having a major impact on food production.
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Individual "A" produces 10 offspring, 8 of whom survive to adulthood. Individual "B" (a member of the same population) produces 15 offspring, 7 which survive to adulthood. Based on the concept of natural selection, individual "A" has the higher fitness.a) trueb) false
Answers
In natural selection when more offspring is survived is a sign of higher fitness of the particular population, hence given statement is true.
What is natural selection?Most qualities are inherited, there are more children generated than can survive, and offspring with more advantageous features will survive and have more offspring than those with less advantageous traits leading to the inevitable process of natural selection.
Since there are only so many resources available, more creatures are born than can live those who are better at obtaining food.
Mating or evading predators will have a higher chance of thriving, procreating, and passing on their DNA.
Therefore an individual in the population has offspring to survive more in number.
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I really need help with this. Thank you.
Answers
Answer:
looks like two compounds so mixture
What sentence best supports the staternent that hormones are involved in the regulation of homeostasas? The hormone melatonin induces sleep and its production is slowed by exposure to light. The hormone cortisol suppresses the immune system and is produced when the body is under stress. The hormone oxytocin promotes labor contractions of the uterus during childbirth. The hormone erythropoeitin increases the production of red blood cells when oxygen levels are low.
Answers
The sentence that supports the statement that hormones are involved in the regulation of homeostasis is: The hormone erythropoietin increases the production of red blood cells when oxygen levels are low.
Homeostasis is the condition of maintaining the adequate conditions inside the living body that are most suitable for its survival. It is the state of steady internal, physical, and chemical conditions. The correct temperature, adequate oxygen concentrations, adequate fluids inside the body are the examples of homeostasis.
Erythropoietin is the hormone produced by the kidney cells that enhances the production of RBCs in the body. This in turn enhances the oxygen concentration inside the body.
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Perennial weeds can be the most difficult to control because they
Answers
Perennial weeds can be the most difficult to control because they have evolved to survive for multiple growing seasons. Unlike annual or biennial weeds that only live for one or two seasons.
Perennial weeds have developed an extensive root system, which enables them to store energy and nutrients from one growing season to the next. This makes them resilient to common weed control methods, such as hand pulling, tilling, or even some herbicides. Perennial weeds can also reproduce through rhizomes, stolons, or bulbs, which allows them to spread rapidly and establish new plants. These reproductive structures can remain dormant for long periods, allowing the weed to resprout even after being seemingly eradicated.
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which two factors contribute to the spread of antibiotic resistances genes in the hospital environment?
Answers
The two factors that lead to the propagation of antibiotic-resistance genes in the hospital environment are poor sanitation and poor hygiene.
Antibiotic resistance occurs when germs like microorganisms and fungi cultivate the talent to defeat the drugs planned to kill the ruling class. In that method, the beginning is not destroyed and continues to evolve. Resistant contaminations may be troublesome, and sometimes absurd, to treat.
The main cause of antibiotic resistance is medicine use. When we use antibiotics, few microorganisms wither but opposing bacteria can keep and even reproduce. The term hospital environment is used for the work environment of staff members in healthcare. The total of the elements, determinants, and environments in the place of contracting includes the physical terrestrial district in addition to the next surroundings of the business.
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Select one of the ways below that have increased human life expectancy
A. new medicines
B. new cars
C. new types of cell phones
D. New types of stores
Answers
Answer:
A. new medicines
Explanation:
New medicines help treat and sometimes cure diseases that wouldn't be treatable 100 yrs ago
. compare the control of gene regulation in eukaryotes and bacteria at the level of initiation of transcription. how do the regulatory mechanisms work? what are the similarities and differences in these two types of organisms in terms of the specific components of the regulatory mechanisms?
Answers
Recognition of the promoter can be affected by activators and repressors.The (omega) component of a RNA polymerase holoenzyme recognizes the promoter in bacteria.
Similarities: Cis-acting elements and trans-acting factors must interact for transcription to begin. Upstream of a transcribed gene are components called promoters that are necessary. Recognition of the promoter can be affected by activators and repressors. Although they have diverse structures, DNA loops have a role in the control of transcription initiation.
Differences: The (omega) component of a RNA polymerase holoenzyme recognizes the promoter in bacteria. The specificity of transcription is controlled by the recognition of various promoter sequences by various (omega) subunits. Additionally, RNAs (attenuators, riboswitches, and sRNAs) can either allow as well as repress initiation, making transcription adapt to environmental or cellular conditions. Repressor proteins that cause DNA conformational adjustments (repression loops) can prevent RNA polymerase from binding to the promoter. In eukaryotes, the chromatin structure may have to be altered in order to change how accessible the promoter is to the transcriptional machinery. General transcription factors attract RNAP II to promoters. Additionally, enhancers and silencers are each bound by activators and repressors, respectively. Large DNA loops may be created, putting promoters & enhancers (or silencers) near to one another, according to one theory.
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