A proposed theory in the history of evolution where prokaryotic cells engulfed aerobic heterotrophic prokaryotes and photosynthesis prokaryotes is called?
a. True
b. False. in developed countries, chronic health problems have replaced infectious diseases as the leading killers during the past century.
Biyu was in a skiing accident. she suffered traumatic head injuries when she came in contact with a tree. biyu's cerebral cortex no longer registers electrical activity, but her brain stem remains active. biyu __________.
The nucleic acid of a virus particle is enclosed in a protein coat. what is it called? see concept 19.1 (page 397) view available hint(s) the nucleic acid of a virus particle is enclosed in a protein coat. what is it called? see concept 19.1 (page 397) genome capsid envelope nucleoid nuclear envelope
The right option is Capsid
A capsid is a protein coat that encloses the nucleic acid (RNA, DNA etc.) of a virus particle. Capsids are in different shapes and the common ones are icosahedral, prolate, and helical. The main role of the capsid is to protect the virus by ensuring that the nucleic acid inside of it is safe.
The mineral most closely associated with proper immune function:
You should only hold your breath when you're preparing to exert a force during exercise.
a. True
b. False
Question 13 unsaved when a person becomes infected by hiv, the virus multiplies and attacks and destroys _______. question 13 options: fat cells red blood cells nerve cells white blood cells smooth muscle
Answer:
the answer above is right lol
Explanation:
just did it
Loosening a kidney by removing adhesions is called what
Loosening a kidney by removing adhesions is called nephrolysis. Kidneys are two bean-shaped organs located in the renal system of vertebrates. They play important roles in the body by maintaining overall fluid balance, filtering waste materials and creating hormones that help produce red blood cells.
Why is river water less clear at the mouth than at the source?
a.because the mouth is warmer
b.because the source is colder
c.because the mouth has debris
d.because the source is warmer
River water is less clear as it approaches the mouth compared to the source because of increased sedimentation, debris, and phytoplankton that accumulate in the slower, wider, and warmer parts of the river.
Explanation:The clarity of river water changes from the source to the mouth due to a variety of factors involving the abiotic features of rivers and streams. At the source, the water is typically cold, clear, and low in nutrients, flowing rapidly through a narrow channel. As the river travels downstream, it gathers more water from tributaries, the channel widens, the gradient decreases, and the water slows down. This environment allows for more sedimentation and the growth of phytoplankton, which makes the water appear less clear. Moreover, the longer exposure to sunlight and less tree cover can make the water at the mouth warmer.
So, the correct answer to why river water is less clear at the mouth than at the source is c. because the mouth has debris, which is inclusive of the increased sedimentation and other particulate matter that accumulates as the river approaches its mouth.
The river water is less clear at the mouth than at the source is c. because the mouth has debris.
As a river flows from its source, it picks up sediment, organic matter, and other particles from the surrounding landscape. By the time the river reaches its mouth, where it meets a larger body of water such as an ocean or a lake, it often carries a significant load of these materials. This increase in suspended particles and sediments reduces the clarity of the water.
Additionally, at the mouth, the river's flow slows down, allowing particles to settle less efficiently and increasing turbidity. In contrast, the water near the source is typically clearer because it has not yet accumulated a large amount of debris and sediments.
List 6 forms of renewable energy and compare the advantages and disadvantages of each
If mitotic cell division is the only way a particular species of single-celled organism can reproduce, it is most likely that
Final answer:
(2) the rate of evolution in this species is slower than in one that reproduces sexually, due to the lack of genetic diversity that arises from meiosis and sexual reproduction.
Explanation:
If a single-celled organism reproduces solely by mitotic cell division, it is most likely that the rate of evolution in this species is slower than in one that reproduces sexually. This is because mitotic division creates clones, or genetically identical offspring, whereby the only method for introducing genetic diversity is through mutations. Sexual reproduction, through meiosis and fertilization, mixes and matches parental DNA, thus providing significant genetic variation which is essential for the evolutionary process. Sexual reproduction also includes mechanisms like crossovers during prophase I and random assortment at metaphase I, which further increase diversity.
It is crucial for adaptation and overall survival that a species can introduce genetic variability into its gene pool. For species that reproduce asexually through mitosis, the evolutionary change relies solely on random mutations, which can be a much slower process compared to the shuffling of genes achieved through sexual reproduction.
Progression through the cell cycle requires a cyclin to bind to a cdk because __________.
Progression through the cell cycle requires a cyclin to bind to a cdk because Cdk needs to be involved in an enzymatic activity.
What is CDK cell?
Serine/threonine kinases known as cyclin-dependent kinases (CDKs) depend on the cyclin regulatory component for their function.
According to the kinase domain sequence, CDKs, along with mitogen-activated protein kinases (MAPKs), glycogen synthase kinase-3 beta (Gsk3), members of the dual-specificity tyrosine-regulated kinase (DYRK) family, and CDK-like kinases, are members of the CMGC group of kinases.
Recent renaming of the proteins in this family as Cdk1 through Cdk20 has made it easier to identify and analyze CDKs.
Therefore, Progression through the cell cycle requires a cyclin to bind to a cdk because Cdk needs to be involved in an enzymatic activity.
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What is the primary function of wave summation?
The main function of wave summation is to produce continuous and smooth contraction of the muscle.
• Wave summation is also known as temporal summation.
• This event takes place when another stimulus is imparted onto a muscle prior to the completion of the previous relaxation period.
• This results in stronger contraction, mainly due to more availability of calcium in the stimulated muscle cells.
• The phenomenon of wave summation works on the principle of the excitation-contraction coupling effects.
Thus, the main function of wave summation is to generate smooth and continuous contraction of the muscle.
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Phospholipids are ____________ lipids that contain a phosphorus atom
Final answer:
Phospholipids are amphipathic lipids with a phosphorus atom that form the hydrophilic heads and hydrophobic tails of cell membranes. Examples like Phosphatidylcholine illustrate their key role in maintaining membrane integrity and supporting cell functions.
Explanation:
Phospholipids are amphipathic lipids that contain a phosphorus atom. These lipids are unique because they have a hydrophilic (water-loving) head that contains a phosphate group and one or more glycerol molecules, and two hydrophobic (water-fearing) fatty acid tails. The amphipathic nature of phospholipids allows them to form cell membranes in a structure known as a lipid bilayer, where the hydrophobic tails face inward, shielded from water, while the hydrophilic heads face outward towards the aqueous environment on both sides of the membrane.
Phosphatidylcholine is an example of a phospholipid. The phospholipid structure is critical in maintaining cell membrane integrity and facilitating cell function, including signaling and substance transport across the membrane. In addition to their structural role, phospholipids can also participate in metabolism and cell signaling processes.
Why are finches important to Darwin's idea?
A client with a history of hypertension is diagnosed with primary hyperaldosteronism. this diagnosis indicates that the client's hypertension is caused by excessive hormone secretion from which gland
Which of the following is an example of an environmental variation?
a Marge dyes her hair blue.
b Homer inherited baldness from his father's side of the family.
c Apu is a tongue roller, but his brother Sanjay is not.
d Bart is a boy because he has an X and a Y chromosome.
Answer:
A. Marge dyes her hair blue
Explanation:
I love the simpsons :)
A: In a cell, small vacuoles that are involved in transporting substances are often called
Answer:
The small vacuoles that are involved in the transporting the substances are known as vesicle. It is a large structure present in the cell, extracellular, consisting of the liquid enclosed by a lipid bilayer.
There are different types of vesicle one of them is transport vesicle. It moves the molecules within the cell. The cell make protein and require them for function and this transportation is done by vesicle.
After receiving a tick bite, jenny worries that she may have become infected with lyme disease. her doctor immediately orders a lyme titer, which comes back as negative. her doctor advises her to come back in three weeks and have the titer repeated. why? the initial titer may have been done so early in the infection that detectable levels of antibody were not yet present the laboratory may have made an error, but it is unlikely to make the same error twice the doctor will send the second titer to a different laboratory as a backup t cell stimulation is delayed during lyme disease incubation
_____________ is the most common method of uploading a website
The most common way to upload a website is by using File Transfer Protocol (FTP). An FTP client is used to transfer your website's files from your computer to the server. This then publishes your website on the internet.
Explanation:The most common method of uploading a website to an online server is by using File Transfer Protocol (FTP). FTP is used to transfer data from one host to another over the internet. It involves using an FTP client, which is a program that runs on your computer and connects to the server where your website will be hosted. After developing your website and saving the pages as .html files, you would use the FTP client to upload these files from your computer to the server. This process effectively publishes your website on the internet.
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BRAINLIESTTTT ASAP!!!!
1. Which statement is true about elements?
They are finite in number.
They are infinite in number.
They combine to form atoms.
They combine to form electrons.
2. Scientists have developed a new drug known to cure a previously incurable disease. What best explains if the new drug is a compound or not?
It is a compound because it will be able to cure a disease.
It is not a compound because it was developed by scientists.
It is a compound because compounds make all types of matter.
It is not a compound because compounds make up only living things.
A pattern of evolution that results when two unrelated species begin to appear similar because of environmental conditions is _____.(think about the relationship between a dolphin and a shark).
A pattern of evolution that results when two unrelated species begin to appear similar because of environmental conditions is convergent evolution.
The pattern of evolution that results when unrelated species begin to appear similar due to environmental conditions is known as convergent evolution. This is the development of similar adaptations in species of different lineages that have evolved independently to respond to similar environmental demands.
Convergent evolution may also involve species adapting similar survival strategies such as camouflage. For instance, species like the arctic fox and ptarmigan (a bird) both develop seasonal white coverings to blend with snow and ice. Though their coverings are of fur and feathers respectively, these adaptations result from common selection pressures—the benefits of avoiding predation.
Therefore, convergent evolution is the process where unrelated species develop similar traits due to similar environmental pressures, exemplified by the similar body shapes of dolphins and sharks for efficient swimming.
Reductions in the population size of the graceful antelope, a hypothetical species, has led to inbreeding. deleterious after-effects of that inbreeding are leading to further decreases in the population size of this species. this pattern is an example of a(n)
Final answer:
The pattern of a population decline due to inbreeding and the associated deleterious effects is known as inbreeding depression, which exacerbates the reduction in genetic diversity and evolutionary capacity of the species.
Explanation:
The pattern described in the question, where inbreeding leads to a decrease in population size due to deleterious effects, which in turn leads to more inbreeding and further population decline, is an example of an inbreeding depression. This occurs when related individuals mate, resulting in reductions in reproduction and survival of offspring due to an increase in the expression of harmful genetic variants, a phenomenon also known as deleterious alleles. As the population size decreases, the probability of inbreeding increases, often exacerbating the situation. This process can significantly lower a population's genetic diversity, ultimately leading to reduced evolutionary capacity and further declines in population vitality.
Moreover, this reduction in genetic diversity can make populations more susceptible to environmental changes, possibly leading to an increased risk of extinction. Important factors such as genetic drift, the bottleneck effect, and the founder effect are other evolutionary forces that influence genetic variance and can cause shifts in allele frequencies within a population, further impacting its genetic health. Additionally, these processes are tightly linked with natural selection, which can either help weed out these detrimental traits or, in small isolated populations, it may not be as effective due to decreased genetic variance.
When charles darwin set sail on the hms beagle, what did he and most of his contemporary scientists think about the origin of species? when charles darwin set sail on the hms beagle, what did he and most of his contemporary scientists think about the origin of species?
Golden rice has been genetically engineered. golden rice differs from other rice varieties because it contains genes that will produce _____.
Answer:
Golden rice has been genetically modified to contain a molecule that helps to make Vitamin A
and other rice varieties because they contain genes that produce beta-carotene
The quality of dietary protein differs among various sources. list and explain the factors that influence protein quality.
Proteins are essential for tissues, bones, muscles, and various biological processes. A protein's quality is based on how many important amino acids are present in its structure.
What is dietary protein?This amount determines how digestible a protein is full proteins are more digestive than incomplete proteins. A protein's quality can also be impacted by exposure to heat or alcohol.
The degree to which a protein satisfies the body's requirements for both essential amino acids and physiological demands is measured by its protein quality.
It is based on a scoring system for amino acids that evaluates the protein's essential amino acid composition in relation to the pattern of requirements.
Therefore, the quality of dietary protein differs in whether a protein contains enough necessary amino acids depending on how it was initially created.
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Which piece of evidence supports the hypothesis shown in the "within the artiodactyls" origin of the whale lineage, suggesting that the whale lineage diverged from the lineage leading to the hippos after the other members of the order artiodactyla (pigs, camels, etc.) diverged?
Fires can result from both human disturbances and natural causes. An immediate effect that wide-spread fires have on any ecosystem is
Answer:
decrease in vegetation
Explanation:
study island
Which example displays a type of point source pollution?
- rainwater carrying toxic chemicals and debris to a river
-melted snow mixed with debris flowing into a city
-untreated water from a factory flowing into a lake
-smoke released by trucks
-rainwater mixing with garbage on the sidewalks of a street
Answer: untreated water from a factory flowing to the river.
Explanation: Point source pollution can be defined as the single source by which the polluted water is coming or pollution is coming.
Here the source is factory and the polluted water from the factory is discharged into the lake.This water from the lake can be transferred to other places.
So, the point source is polluted water from factory
Which of the following professions has NOT contributed significantly to the development of therapeutic use of herbs and pharmaceuticals?
anthropologist
biologist
chemist
botanist