Describe major trends in the evolution of life on Earth seen over geologic time supported by fossils
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Trilobites, cephalopods like squid, as well as insects and plants are common relics from the Paleozoic era. A progression of evolution can be seen in fossils, which offer compelling proof that species from the past were distinct from those present now.
The morphological, or anatomical, record is made up of fossils and the comparative anatomy of living things right now. Important evidence for evolution and the adaptation of plants and animals to their habitats can be found in fossils. Fossil data records how creatures evolved and how this process can be represented by a "tree of life," demonstrating the interconnectedness of all species.
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Describe major trends in the evolution of life on Earth seen over geologic time supported by fossils?
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PLS HELP!!!!!!!!!!!!!!!!!!!!!!!
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Answer:
Other organisms were another factor. What kinds of changes in other populations of organisms could be affecting the moths?
Explanation:
umm.
which best describes the nucleus of an atom?
A. it is the most massive part of an atom
B. It contains no mass.
C. Its made of neutrons and electrons.
D. it is negatively charged part of the atom.
Answers
The nucleus of an atom describes option A. It is the most massive part of an atom.
The nucleus is the central part of an atom and is composed of protons and neutrons. Protons have a positive charge, while neutrons have no charge (they are neutral). Electrons, on the other hand, are negatively charged particles that orbit the nucleus in electron shells. The nucleus is incredibly small compared to the overall size of the atom, but it contains most of the atom's mass.
The protons and neutrons within the nucleus contribute to the mass of the atom, while the electrons have a negligible mass in comparison. The mass of an atom is determined by the total number of protons and neutrons in the nucleus. Protons and neutrons have roughly the same mass, and their combined mass gives the atom its atomic mass.
Electrons, though they have mass, contribute very little to the overall mass of the atom. The nucleus also plays a critical role in determining the chemical properties and behavior of an atom. The number of protons in the nucleus determines the atomic number, which defines the element and its unique properties. Therefore, the correct answer is option A.
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Where does transcription take place & what form of rna plays a role?.
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Answer:
Brainliest pls
Explanation:
That's because transcription happens in the nucleus of human cells, while translation happens in the cytosol. Also, in eukaryotes, RNA molecules need to go through special processing steps before translation.
a mutation that readily reverses to restore the original parental type would most likely be due to a(n)
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A mutation that readily reverses to restore the original parental type would most likely be due to a reversion mutation.
A mutation is a heritable variation in the DNA sequence that can be passed on from one generation to the next. Mutation is the source of genetic variation, and it is how species adapt to new environments and evolve.
In genetics, "parental type" refers to the genetic characteristics of the parents that are passed on to their offspring. Parental types may be homozygous or heterozygous for specific traits, and they can be used to determine the inheritance patterns of genes. The reversion mutation is a kind of genetic mutation that alters the DNA sequence but then returns it to its original state.
A reversion mutation is the reversal of a previously existing mutation. Reversion mutations can be caused by different mechanisms, including base substitutions and frame-shift mutations. A reversion mutation can restore the original genetic sequence, and the organism will return to its parental type.
As a result, reversion mutations are frequently used in genetic research to study the mechanisms of mutation and genetic variability.
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The COVID-19 virus has mutated so the different variants have caused additional surges in daily deaths. Fortunately, vaccinations have helped to mitigate the effect of these surges. The U.S. CDC (Centers for Disease Control) provides COVID data tracking. CDC a) Use the CDC site to show that NJ has had additional surges in daily COVID deaths since Figure 1.4. b) Cause-and Effect refers to the relationship between an event (the cause) that makes something else happen (the effect). Use the CDC site for NJ to show that Daily Cases and Hopitalizations are both leading indicators (causes) of Daily COVID Deaths (effect). [That is, an increase in these causes occurs before we see an increase in Daily deaths. ]
Answers
a) The CDC data shows that New Jersey (NJ) has experienced additional surges in daily COVID-19 deaths since Figure 1.4.
b) Daily cases and hospitalizations in NJ are leading indicators of daily COVID-19 deaths, demonstrating a cause-and-effect relationship.
a) By accessing the CDC data for New Jersey, it is evident that the state has witnessed additional surges in daily COVID-19 deaths since Figure 1.4. The data provided by the CDC allows for a comprehensive understanding of the impact of the virus in different regions, and in the case of New Jersey, it highlights the unfortunate reality of increased mortality due to the mutated variants of the virus.
b) The CDC data for New Jersey also reveals that daily cases and hospitalizations act as leading indicators of daily COVID-19 deaths. This implies that an increase in daily cases and hospitalizations occurs before a subsequent increase in daily deaths. These indicators serve as crucial warning signs, allowing healthcare professionals and policymakers to anticipate and respond to the potential escalation in fatalities.
Understanding the cause-and-effect relationship between daily cases and hospitalizations as leading indicators and daily COVID-19 deaths is vital for effective public health measures and resource allocation. It underscores the importance of early detection and intervention to prevent the further spread of the virus and minimize its impact on mortality rates.
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What do you do for scurrying good marks as you want?
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Answer:
you have to read and understand what you are going to write about.
Please please please help. What exactly is revealed by Tom Robinson's testimony?
Answers
Answer:
Bob Ewell s**ually abuses his daughter.
Explanation:
Truthfully, Tom's testimony actually embarrasses the Ewells more. Tom tells the court that Mayella asked him to kiss her saying, "'what her papa do to her don't count,'" which informs the whole town that Bob Ewell s**ually abuses his daughter.
Prior to the industrial revolution in the mid-1800s, a species of moth had light-colored wings speckled with small black spots. This coloration camouflaged the moths resting on the birch trees growing in their native habitat, since birch bark has similar coloring. In the early 1900s, this changed as dark soot produced by industrial pollution coated birch trees such that the trees lost their speckled coloring. Years later, it was observed that the moths of this species had changed from being light and speckled to being solid black. Which is the most plausible reason for this change
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Answer:
The dark colored moths were due to a genetic mutation, and were more than likely present before the Industrial Revolution. Their fitness was low because predators could easily see them on the light-colored trees. They would be eaten before they could reproduce and pass on their genetic mutation. After the trees became darkened by soot, the darker colored moths now had the survival advantage, able to "hide" from predators. The lighter colored moths became more visible to predators, and the advantage shifted. Now, the light colored moths were more visible to predators, were eaten, and didn't have the chance to reproduce. The darker moths with the mutation had the survival advantage, blending in with the soot-covered trees, and were able to reproduce at higher rates, passing the mutation on to later generations.
Is this right yea or no and please just don’t say it’s right if u don’t know
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Answer:
i cant not see the question that you are asking me to solve for you
Explanation:
Golgi apparatus
In bacteria, a partially diploid strain may result from.
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n bacteria, a partially diploid strain may result from bacterial conjugation or transformation. Bacterial conjugation is a process by which genetic material, usually in the form of a plasmid, is transferred from one bacterium to another.
During conjugation, two bacterial cells come into direct contact, and the donor bacterium transfers a portion of its genetic material to the recipient bacterium. This can include the transfer of a plasmid carrying additional genetic information. As a result, the recipient bacterium becomes partially diploid, containing both its own chromosomal DNA and the transferred DNA. Similarly, bacterial transformation is another mechanism by which bacteria can acquire foreign DNA. In transformation, bacteria take up free-floating DNA from their environment. If the acquired DNA integrates into the bacterial chromosome, it can result in partial diploidy in the recipient bacterium advantages.
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Pls help meeeee with that
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Answer:
I have pictures to show of this assignment if you need help
which of the statements about hemoglobin and myoglobin structure are true? both hemoglobin and myoglobin contain a prosthetic group called heme, which contains a central iron (fe) ( fe ) atom. hemoglobin and myoglobin are heterotetramers. each hemoglobin molecule can bind four oxygen molecules and each myoglobin can bind only one oxygen molecule. the heme prosthetic group is located in a hydrophobic cleft in the protein, with propionate (propanoate) groups exposed at the surface. each iron atom can form six coordination bonds and one of these bonds is formed between iron and oxygen. molecular oxygen binds irreversibly to fe2 fe 2 in heme. by itself, heme is not a good oxygen carrier. it must be part of a larger protein to prevent oxidation of the iron.
Answers
Five statements about the structure of hemoglobin and myoglobin are correct: - 1:- Both hemoglobin and myoglobin contain a prosthetic group known as heme.
which contains a central iron atom, which is a true statement because iron atoms can bind with one oxygen molecule. As a result, this statement is correct.
The equilibrium between oxyhemoglobin (oxygen-bound hemoglobin) and hemoglobin (free of oxygen molecules). Each molecule of hemoglobin can bind up to four oxygen molecules at the same time; this occurs through cooperative binding, which means that increased hemoglobin-oxygen binding at the protein hemoglobin's subunits (where oxygen is a ligand) increases its affinity for oxygen.
This is because the altered orientation of the protein's secondary structures causes a conformational change in the hemoglobin molecule, making it easier for a second molecule of oxygen to be followed by more O2-Haem binding until the molecule is saturated. However, because myoglobin only has one Hem subunit, it can only bind to one molecule of oxygen. while hemoglobin has the ability to bind four.
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The table lists some organelles and functions. Only one pair is correctly matched.
Functions of Organelles
Organelle Function
Nucleus Directs cell activity
Endoplasmic reticulum Breaks down sugar molecules to supply energy
Golgi apparatus Supports and protects organelles in the cell
Lysosome Produces proteins for the cell
Which organelle in the table is correctly matched with its function?
Answers
Answer:
I believe the correct answer is nucleus.
Neither endosomes nor lysosomes are found in the nucleus. The nucleus serves as the primary remote control for the cell. It acts as the cell's brain by giving instructions on what to do, how to grow, and when to reproduce.
What is the cell controlling power of nucleus?The nucleus serves as the primary remote control for the cell. It acts as the cell's brain by giving instructions on what to do, how to grow, and when to reproduce. The nucleus of the cell contains the cell's genes.
The nucleus is the area of the cell that manages all of its operations. The nucleus is a membrane-bound, spherical organelle.
Its membrane, known as the nuclear membrane, has nuclear pores that control how materials are transported into and out of the cell. The nucleus' ability to store DNA is its primary role.
Therefore, Nucleus organelle in the table is correctly matched with its function.
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given that a protein solution will have a 280/260 of about 1.75 and the same ratio for pure dna is 0.56, what % of the absorbance at 280 nm is due to dna when the 280/260 ratio is 1.155?
Answers
The following calculation can be used to calculate the percentage of the absorbance at 280 nm that is due to DNA: DNA percentage equals [(A280/A260) - (A280/A260)protein] DNA (A280/A260) and protein (A280/A260) x 100
What DNA 260 to 280 ratio is deemed acceptable?For DNA, a ratio of 1.8 is considered "pure"; for RNA, a ratio of 2.0 is considered "pure." It may indicate the presence of protein, phenol, or other pollutants that absorb heavily at or near 280 nm if the ratio is noticeably reduced in either situation.
What does DNA with a high 260 280 ratio mean?The sample is either contaminated by protein or a reagent like phenol, or there was a problem with the analysis, according to abnormal 260/280 ratios.
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Which of the following BEST describes the relationship between concentration and enzyme activity?
A. As enzyme concentration decreases, enzyme activity increases.
B. When substrate concentration decreases, enzyme activity decreases.
C. As substrate concentration increases, substrate activity increases.
D. When substrate concentration increases, enzyme activity decreases.
Answers
The statement that BEST describes the relationship between concentration and enzyme activity is when substrate concentration decreases, enzyme activity decreases (Option B).
Enzymes are proteins that speed up chemical reactions by lowering the activation energy of that reaction.Some factors that alter enzymatic activity include temperature, pH, and substrate concentration. An enzyme works in optimum condition as long as there is more substrate available which can be broken down by the specific enzyme.However, the enzymatic activity increases as the substrate concentration until a limiting value is reached.In conclusion, the statement that BEST describes the relationship between concentration and enzyme activity is when substrate concentration decreases, enzyme activity decreases (Option B is correct).
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how does the ear function as a sense of "sight" for the blind?
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Answer:
Neural scanning shows that even when only abstract sounds are used, the brain engages the visual cortex to build up an audio image. By learning the audio language, users can make their way around obstacles or identify and grasp nearby items.
The ear is not commonly thought of as a sense of "sight" for the blind, but some assistive technologies do use auditory cues to help people with vision impairments navigate and understand their environment.
What is echolocation?Echolocation is the ability of certain animals, such as bats, dolphins, and certain species of birds, to locate objects and navigate through their environment by producing sounds and listening to the echoes that are reflected back. These animals emit high-pitched sounds, such as clicks or whistles, and then use the echoes of these sounds to determine the distance, direction, and shape of objects around them.
The ability to echolocate is made possible by specialized structures in the animals' ears and brains that are able to detect, process, and analyze the echoes. In bats, for example, the larynx is modified to produce a variety of calls, while the ears are highly sensitive and specialized to pick up the echoes of these calls. Similarly, dolphins have a complex system of air spaces in their head, which they use to emit and detect sounds, as well as specialized neurons in their brain that can process the information gathered by echolocation.
Echolocation is an incredibly sophisticated and efficient system, allowing animals to navigate in complete darkness and through complex environments, and to locate and track prey even in the open ocean or in the dark.
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____ means examining the whole in order to learn about the individual elements.
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Holistic analysis means examining the whole in order to learn about the individual elements.
This approach involves looking at something as a complete system or entity, rather than simply focusing on isolated parts or components. By taking a holistic approach, we can gain a deeper understanding of how each individual element contributes to the overall function and purpose of the system.
Holistic analysis can be applied to various fields, including medicine, psychology, and business. In medicine, doctors may use a holistic approach to understand how different symptoms and conditions are interconnected and affecting a patient's overall health. In psychology, therapists may use a holistic approach to assess a person's mental health by examining factors such as their environment, relationships, and lifestyle habits.
Overall, holistic analysis is a valuable tool for gaining a comprehensive understanding of complex systems and how their individual elements interact and influence each other.
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which term means an inflammation of a fallopian tube?
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The term that refers to an inflammation of a fallopian tube is called "salpingitis."
Salpingitis is a medical condition characterized by the inflammation of the fallopian tubes, which are the structures that connect the ovaries to the uterus in the female reproductive system. It is commonly caused by bacterial infections, particularly sexually transmitted infections such as gonorrhea and chlamydia. The infection can spread from the vagina and cervix into the fallopian tubes, leading to inflammation.
Salpingitis can cause various symptoms, including lower abdominal pain, pelvic discomfort, abnormal vaginal discharge, painful intercourse, and fever. If left untreated, it can lead to complications such as scarring and blockage of the fallopian tubes, which can result in fertility problems and increase the risk of ectopic pregnancy (a pregnancy that occurs outside the uterus).
Diagnosis of salpingitis involves a combination of medical history evaluation, physical examination, and laboratory tests. Treatment typically involves antibiotic therapy to clear the infection and reduce inflammation. In severe cases or when complications occur, surgical intervention may be necessary. It is important to seek medical attention if symptoms of salpingitis are present to prevent further complications and preserve reproductive health.
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how the structure of dna determines the structure of proteins which carry out the essential functions of life through systems of specialized cells.
Answers
The structure of DNA determines the structure of proteins because proteins are made by the central dogma process where DNA is the initial component.
In the process of the central dogma, transcription is the process through which the DNA is transcribed into the mRNA. Through the information in the mRNA, proteins are produced by the translation process.
Hence, the structure of proteins as well its function etc are all determined by the DNA whose information is transcribed and translated for the formation of that particular protein.
Each protein formed from the transcription and translation of DNA has a specialized function to perform.
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Which of these is produced as a result of fertilization?
-a zygote with half the number of chromosomes as a gamete
-a gamete with twice the number of chromosomes as a zygote
-a zygote with twice the number of chromosomes as a gamete
-an egg with half the number of chromosomes as a zygote
Answers
Explanation:
Third Option is absolutely correct.
How long does methamphetamines stay in your system?
Answers
Meth is typically detectable in urine for up to 72 hours after the last dose. Because methamphetamine metabolizes to amphetamine, both drugs are likely to show up on a drug test.
The typical detection window for stimulants of the amphetamine type in urine is 3 to 5 days following the last administration.
In heavy, chronic users, this period might be longer; it might be seen in the urine for as long as a week.
Tests on the hair, blood, and oral fluids can also be used to identify meth users. For detecting recent ingestion, blood and oral fluid testing can be more effective and precise than urine testing, but both have shorter detection windows than urine testing. Depending on the type of hair test utilized, meth can be detected up to 90 days after the last use. Clinical or workplace testing typically do not use it because they are more appropriate for forensic or research study testing.
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Osmosis requires energy
True
Or
False
Answers
Answer:
Diffusion and osmosis don't require the cell to expend any of its own energy, as they are passive processes. As we know both are passive processes and yet (in basic, short terms) diffusion is higher to lower and osmosis is lower to higher, so movement to concentration doesn't determine whether it is active or passive.
Explanation: ur welcome
True or false air entering a low pressure region will fall and cool
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The correct answer to the statement " air entering a low pressure region will fall and cool " is absolutely false.
What is meant by pressure region?A pressure region simply refers to that area of a body or system in which pressure is directly excerted in that area. In science, it is ratio of force per unit area.
From the context of the task given above, the air entering a low pressure region will fall and cool is not true simply because of the reduced pressure. The S.I unit of pressure is Newton ( N )
In conclusion, it can therefore be deduced from the explanation given above that pressure is derived quantity.
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Electric muscle stimulation (ems), in which a salon professional usually wears a wrist band with a moistened electrode, is known as the?
Answers
Electric muscle stimulation (ems), in which a salon professional usually wears a wrist band with a moistened electrode, is known as the indirect method of the electrotherapy.
What is electric muscle simulation ?
The use of electrical impulses to cause muscle contractions is known as electrical muscle stimulation (EMS), sometimes known as neuromuscular electrical stimulation (NMES) or electromyostimulation. EMS has drawn more attention in recent years, including its potential use as a strength training tool for athletes and healthy subjects.
As a rehabilitation and preventive measure for people who are partially or completely paralyzed, as a method of testing the neural and/or muscular function in vivo, and as a post-exercise recovery method for athletes.
The impulses are produced by a machine and supplied via electrodes placed close to the muscles that need to be stimulated on the skin.
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How does human influence affect earths climate
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18 points!!!!
Which of the following best describes a heterogeneous mixture?
A) Blueberry muffin
B) Brass
C) saline solution
D) Diamonds
Answers
How is the Indominus Rex a hybrid species?
Answers
Answer: The Indominus Rex is a hybrid species because the I. Rex is a genetically modified species of dinosaur by combining the base genome of a Tyrannosaurus with that of a Velociraptor.
Give an example of how structure and function are related on the cellular level.
Answers
Answer:
Function and structure are related, because of a certain structure a living thing make contain makes the object function the way it does. ... The relationship of a structure and function is the structuring levels from molecules to organism ensure successful functioning in all living organism and living system
Explanation:
Particles that become planets
Answers
Explanation:
The planets in our Solar System are believed to have formed from the same spinning disc of dust that formed the Sun. This disc, called the solar nebula, was composed mainly of hydrogen and helium, but also had other elements in smaller proportions.
Suggest one thing he could do to the skin cells to make them easier to see.
Answers
Answer:
Explanation:
To make skin cells easier to see, one thing that can be done is to stain the cells. Staining involves using dyes or chemicals that selectively bind to specific components of the cells, making them more visible under a microscope or magnifying lens. There are various staining techniques available for different purposes, such as highlighting the cell nucleus or specific cellular structures. By applying a suitable stain, the contrast between the cells and the surrounding background is enhanced, allowing for easier visualization and examination of the skin cells.