DNA could best be described as -
a double helix structure that consists of two polynucleotide chains
O a five carbon sugar found as part of the structural components of a nucleotide
O a structure containing information about the external environment of a cell.
O all of the possible forms of a gene that can occur in an individual
Answers
A DNA molecule consists of two strands that wind around each to form a double helix. Double-stranded DNA consists of two polynucleotide chains.
Related Questions
Use the terms on the right to complete the sentence. Starting with a diploid parent cell containing 32 chromosomes, determine what mitosis and meiosis would yield. NOTE: Some terms may be used twice, or not at all. Incorrect answers will cancel out correct answers. 16 chromosomes 2 haploid cells 2 diploid cells 8 chromosomes 4 haploid cells 32 chromosomes 4 diploid cells Mitosis would yield _____ cells with _____ chromosomes in each daughter cell. (2 options, 1 point each) Meiosis would yield _____ cells with _____ chromosomes in each daughter cell. (2 options, 1 point each)
Answers
Answer:
Mitosis would yield _2 diploid_ cells with __32__ chromosomes in each daughter cell. Meiosis would yield _4 haploid_ cells with _16_ chromosomes in each daughter cell.Explanation:
There are two principal types of cells in the organism: Somatic diploid cells (2n) that reproduce by the process of mitosis, and germ cells that are diploid reproductive cells in charge of gamete production. Germ cells divide by mitosis and meiosis. Through the process of mitosis, they originate more sexual cells, but through the process of meiosis, they give place to haploid gametes, called sperm and egg cells, through the gametogenesis process.
Both somatic cells and germinal cells will end their cycle becoming two daughter cells with the same genetic dotation.
Gametes´destiny is to merge during fecundation, and a new diploid cell called zygote emerges through fertilization. The zygote is a complete cell and suffers successive mitosis to form the new organism.
• Meiosis produces four daughter haploid cells (n) from a diploid germ cell (2n). Each daughter cell is haploid because they have half the number of the chromosomes of the original one.
• Mitosis produces two daughter diploid cells (2n) from a diploid somatic cell (2n). During mitosis, the whole-cell first duplicates and then separates.
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THE BIG IDEA ALL LIVING THINGS SHARE COMMON TRAITS Activity 1: Lesson introduction
CONSIDER AND CONNECT
DIRECTIONS: After reading the lesson introduction below, complete the activity by answering the questions that follow.
Think about the last time you ate a bowl of cereal. Maybe it was this morning, or months but if you concentrate you will remember the experience. Close your eyes and get a mental picture of yourself eating and tasting the cereal. Describe in as much detail as possible what you remember about the last time you ate cereal. Include what type of cereal you ate as well as the dishes you used or the room in which you enjoyed your meal.
Most likely your response involved eating cereal in a bowl, and with a spoon.
1. How would your experience of eating cereal.
have been different if you would have used a plate instead of a bowl and a fork instead of a spoon?
2. Why do you think that we have different dishes and utensils to eat different foods?
In the same way that your kitchen uses different items, like pots, plates, or utensils, your body has different parts to perform different functions. The way a part looks often relates to what it does. For example I cannot bake a cake by putting it in the refrigerator because the refrigerator has parts that make it cold not hot! This idea that structure, or how something is made and looks, relates directly to its function, or the job that it does, is just one of the unifying themes of biology that you will learn about in this lesson. By understanding the basic principles of life and what it means to be "living" you will be able to relate complex concepts throughout all areas of biology. The unifying themes can help simplify these concepts keeping you focused and connected.
Answers
Answer:
1) We would not enjoy our breakfast. It just wouldn't be the same. The way a part looks often relates to what it does. For example soup is a liquid yet we do not drink soup from a water bottle.
2)The idea is that structure, or how something is made and looks, relates directly to its function. When we look at the various eateries in our kitchen we immediately know how it is served and the way it tastes.
When we look at the different utensils in our kitchen, we immediately understand their function.
Hope this helps.
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human chorionic gonadotropin (hCG)
The hormone produced by cells around the embryo that maintains the corpus luteum and pregnancy is called
Answers
The hormone produced by cells around the embryo that maintains the corpus luteum and pregnancy is called human chorionic gonadotropin (hCG).
Human chorionic gonadotropin (hCG) is a hormone that is produced by cells around the embryo, that is, trophoblastic cells that develop into the placenta, after fertilization. Its main function is to maintain the corpus luteum during the early stages of pregnancy. The corpus luteum is a temporary endocrine structure that develops after the release of an egg from the ovary, that is, after ovulation. It produces progesterone, which is essential for the maintenance of pregnancy in humans.
If an egg is fertilized by a sperm, the resulting embryo secretes hCG, which signals the corpus luteum to continue producing progesterone. This is necessary to prevent the lining of the uterus from shedding and to maintain the pregnancy. If the corpus luteum did not receive this signal, it would degenerate after about 12 days, and progesterone levels would decline. This would cause the lining of the uterus to be shed and menstruation to occur. The levels of hCG in a woman's blood and urine can be used to diagnose pregnancy. hCG levels rise rapidly in the first few weeks of pregnancy and can be detected by a blood or urine test. After about 10 weeks of pregnancy, hCG levels start to decline and eventually level off.
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please help me i really need to pass this
Answers
17:C
19:A
20:G
15:F
H13
14:E
18:D
I think
topic 2 what is adaptive radiation? what makes it a macroevolutionary process (rather than a microevolutionary process)?
Answers
Adaptive radiation describes how species spread out over new geographic space and then adapt. In time, speciation is possible which is a maco process.
Adaptive radiation is a process in which a single ancestral species diverges into multiple new species in response to the availability of new ecological niches. This can happen when a species expands into a new geographic area with a different set of environmental conditions or when a species evolves new adaptations allowing it to exploit the latest ecological niche.
As the ancestral species adapt to the new environment and evolves traits, it may eventually diverge into multiple new species through the process of speciation. Speciation is the process by which two populations of a species become reproductively isolated from each other and evolve into distinct, genetically distinct species. This can happen through a variety of mechanisms, such as geographic isolation, behavioral isolation, or reproductive isolation.
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Atom A has six protons , five neutrons and five electrons. Atom B five protons , six neutrons, and five electrons . Are atoms A and B of the same element ?
1. no, because they do not have the same number of protons
2. no, because they do not have the same number of neutrons
3. yes , because they have the same number of electrons
4. yes , because both have 16 protons , neutrons, and electrons combined
Answers
Answer:
no, because they do not have the same number of protons
Explanation:
No of protons represents atomic number which decides the characteristics of an atom . Two atoms having same number of protons but different number of neutrons are same element . They differ only in some physical characteristics . They are called isotopes . In respect of chemical properties they are same . In a neutral element number of protons and number of electrons are same . But in some case number of electrons may differ . In that case they form ions of the element . In positive ion , number of electrons is shorter than number of protons .
In the present case , atom A and atom B differ in respect of number of protons so they represent different element .
A population of frogs in a pond is growing under natural conditions with limited resources. As the frog population increases in size, how will population density affect its growth rate?
Answers
Population density will Decline and population increase will eventually rise.
How can the ecosystem in which populations live affect the size of the population?In an ecosystem, the folk of a species will rise until reaches the carrying capacity.
Then the denizens size remains fairly the exact. If abiotic or biotic factors alter, the carrying capacity alter as well. Natural tragedies can shatter resources in an ecosystem.
Thus,Decline and population increase will eventually rise.
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Question:
A population of frogs in a pond is growing under natural conditions with limited resources.
As the frog population increases in size, how will population density affect its growth rate?
Answer: CORRECT (SELECTED)
Population density will increase and the rate of population growth will eventually slow.
Explanation:
The relationship between population growth and population density is proportional, so density increases as population growth increases. However, growth will eventually slow as a population reaches its carrying capacity.
Objective: Investigate which color skittles dissolve the fastest.
Hypothesis:
Variables:
Independent:
Dependent:
Answers
Independent Variable: the color of the Skittle
Dependent Variable: the duration required for the Skittle to dissolve completely
The independent variable is the color of the Skittle, and the dependent variable is the duration required for the Skittle to dissolve completely. The hypothesis would be that the color of the Skittle will affect its rate of dissolution in water. There would likely be multiple independent variables to consider, such as the temperature of the water, the concentration of the solution, and the amount of agitation. The experiment would need to be designed so that the dependent variable is measured accurately and precisely, and so that any extraneous variables are controlled for. This would require careful experimentation and analysis using proper techniques such as error analysis, statistical analysis, and experimental design.
--------------------------------------------------------------------
or
Independent variables:
1. Type of Skittles (red, green, blue, yellow, purple, orange, brown)
2. Time (30 seconds, 5 minutes, 10 minutes)
3. Temperature (room temperature, hot water, cold water)
4. Type of solvent (water, acetone, vinegar, alcohol)
Dependent variables:
1. Time taken to dissolve all the Skittles in each test
2. Rate of dissolution (time taken to dissolve one Skittle)
In this experiment, the independent variables are the different colors of Skittles, time, temperature, and type of solvent. The dependent variables are the time taken to dissolve all of the Skittles in each test and the rate of dissolution, which is the time taken to dissolve one Skittle. The hypothesis is that there will be a significant difference in the dissolution time of different colored Skittles.
What instrument do we normally use in our labs at school to observe microscopic things?
Answers
Answer:
A microscope!
Explanation:
A microscope is used to magnify objects that are too small to be seen by the human eye. I hope this helps! :)
No decorrer das semanas, a lua apresenta diferentes aspectos. A causa para essas mudanças na aparência do satélite da terra é: A) a sombra da terra refletida sobre a lua. B) o movimento de rotação da lua em torno do seu próprio eixo. C) os raios solares que incidem na superfície da lua. D) a translação da lua ao redor da terra.
Answers
Answer:
C) the sun's rays that fall on the moon's surface.
Explanation:
The moon has different aspects and appearance because of the sun's rays that fall on the moon's surface. The shape of the Moon does not change itself, it occurs due to the sunlight. We only see that part of moon which is lit by the Sun. The phases of moon occur because the Sun lit different parts of the moon when the Moon revolves around the Earth so we can say that sun rays are responsible for the changing of shapes of the moon.
How is agrovoltaics different from floatovoltaics? How are they similar?
Answers
Answer:
The differences are;
1) Agrovoltaics is the development of a piece of land for use in agriculture and electricity generation by photovoltaic panels
Flotovoltaic is the development of water bodies for the generation of solar power by mounting solar on platforms placed over a water body rather than on land
2) With agrovoltaics, solar power, breeding of livestock, and crop production can take place on the the same land which increases profitability and reduces the cost of electricity production by solar energy
3) The efficiency of the generation of power from solar energy on the agrovoltaic system is lower than the efficiency of solar power generation through the agrovoltaic system
The similarities are;
1) Both systems seek to maximize the use of space for solar power generation
2) The source of power generation is solar power in both systems
3) Both systems make use of solar panels for the generation of electricity
Explanation:
A. Glucose is a common sugar in the bloodstream of humans. The chemical formula for glucose is C6H12O6. Explain how parts of a glucose molecule are used to make amino acids.
Answers
Glucose is a monosaccharide containing an aldehyde group (-CHO). It is made of 6 carbon atoms, 12 hydrogen atoms and 6 oxygen atoms.
Glucose does not contain nitrogen like amino acid , so unless any chemical is involved glucose cant be converted to amino acid .
It is also known as dextrose. It is referred to as aldohexose as it contains 6 carbon atoms and an aldehyde group. This is the most abundant organic compound. Glucose is also known as reducing sugar because it belongs to the category open-chain molecule with an aldehyde group. Glucose is an important component of human blood normally ranges from 65 mg to 110 mg of glucose per 100 mL.
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help i need help ASAP plssss
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Most states and the Federal government keep databases of DNA profiles of felons.There is frequent debate about whether there should be a national database of DNA for all citizens,regardless of offender status Argue for or against a national DNA database,using your knowledge of forensics and your own opinion. If there is one should it be voluntary or mandatory ? Regardless of your choice about whether the database would be mandatory,if there was a voluntary database, would you sign up for it? Why or why not?
Answers
1) The DNA database can be key in crime solving
2) I would not sign up for the voluntary database
What is the debate about DNA?
A comprehensive DNA database could enhance law enforcement's ability to solve crimes by providing a larger pool of potential suspects and aiding in the identification of unknown individuals. It could help prevent future crimes and bring closure to victims and their families.
Some people may be willing to participate if they believe it would contribute to public safety and the greater good. Others may prioritize their privacy and choose not to participate, concerned about the potential risks associated with the collection and use of their genetic information. I would not sign up
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Angiosperms are flowering plants. The carpal is a reproductive organ within the flower. What part of the carpal becomes the fruit when fertilization occurs? The image shows a flower with 8 different lines pointing to different parts of the flower. The lines are labeled A through H. Part C Part D Part H Part I
Answers
Answer:
Ovary becomes the fruit while ovule becomes seed after fertilization.
Explanation:
There's no image so I can't show whether it's A or H.
Hope it helps.
Answer:
The answer is H
Explanation:
What can affect the rate of a chemical change?
A. color
B. texture
C. temperature
D. gas bubbles
Answers
HELP! I NEED IT SOON! ILL GIVE BRAINLIEST
Answers
Answer: A: People with different goals can make contributions to scientific knowledge.
Schwann and Virchow both had different goals for what they were trying to discover, but both ended up adding to the same theory.
Hope this helps :)
4
The image below shows an infection treated with an antibiotic.
What would likely happen if the same antibiotic were to be used again?
A.
The resistant bacterium would change and lose its resistance, and the infection would be cured.
B.
The normal bacteria would change to become resistant, leading to an infection that is unaffected by the antibiotic.
C.
All of the bacteria would die, including the resistant bacterium, and the infection would be cured.
D.
The resistant bacterium would survive and reproduce, leading to an infection that is unaffected by the antibiotic.
Answers
The most likely if the same antibiotic were to be used again is that D. The resistant bacterium would survive and reproduce, leading to an infection that is unaffected by the antibiotic.
What is the process of antibiotic resistance?The process of antibiotic resistance is a purely evolutionary phenomenon that involves the selection by means of natural selection force of the resistant phenotypes in the original population such as occurs in this case with the selective pressure on the original bacterial population in order to form the next generation of bacteria that will have an increased resistance to the antibiotic after initial exposure.
Therefore, with this data, we can see that the process of antibiotic resistance leads to the process of natural selection of the resistant phenotypes in the original bacterial strain, which is associated with the change in the gene frequencies over generations.
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What is the positive solution to the equation 4x^2+26=71
Answers
We can solve the equation 4x^2 + 26 = 71 by first subtracting 26 from both sides to get:
4x^2 = 71 - 26 = 45
Then, divide both sides by 4 to isolate x^2:
x^2 = 45/4
Finally, take the square root of both sides, remembering to include both the positive and negative square roots, but since we are looking for the positive solution, we only consider the positive square root:
x = ± √(45/4)
x = ± (3/2)√5
The positive solution is x = (3/2)√5, which is approximately 3.354.
Therefore, the positive solution to the equation 4x^2 + 26 = 71 is (3/2)√5.
Assume that the unaided human eye has a limit of resolution of about 0.25 mm what was the limit of resolution of antonie van leeuwenhoek 's microscope?
Answers
The limit of resolution of Antonie Van Leeuwenhoek's microscope is 0.83 micron.
The formula to calculate wavelength is d =λ/(2NA) (2NA)
where denotes the light wavelength that was employed to photograph the specimen. The (theoretical) limit of resolution will be 177 nm if a 514 nm green light and a 1.45 NA oil-immersion objective are used.
Microbiology's founding father, Leeuwenhoek, is widely recognized. He found bacteria as well as protists. He wasn't just the first to glimpse this unfathomable realm of "animalcules," he was also the first to consider looking—certainly, the first with the capacity to see.
Such straightforward microscopes were preferred at the time over compound microscopes, which exacerbated the issue of chromatic aberration. Leeuwenhoek created microscopes with a single high-quality lens with a very short focal length.
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what are -zoline drugs. Oxymetazoline, naphazoline, tetrahydrozoline
Answers
Zoline drugs are a class of drugs that are used as nasal decongestants. They work by constricting the blood vessels in the nasal passages, reducing inflammation and congestion.
The three drugs mentioned in the question, oxymetazoline, naphazoline, and tetrahydrozoline, are all examples of zoline drugs.
Oxymetazoline is commonly used as a nasal spray or drops to relieve congestion caused by allergies or colds. Naphazoline is another nasal decongestant that is often found in eye drops as well. Tetrahydrozoline is also used as a nasal decongestant and in eye drops to relieve redness and itching.
While these drugs can be effective at relieving congestion, they should be used with caution as overuse can lead to rebound congestion and other side effects. It is important to follow the recommended dosages and not to use them for more than three days in a row without consulting a healthcare professional.
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Which statement best defines building blocks
Answers
Answer:
Building blocks are the basic units of a structure, they are what make up something. Atoms are building blocks of everything, atoms are the basic unit of matter and is the building blocks of physically everything.
Explanation:
if a snake species were introduced to an ecosystem where it had no natural predators, what long-term effect do you predict the snakes would have on the population dynamics of the ecosystem?
They would breed with native snake species, resulting in an increase in biodiversity in the ecosystem.
They would serve as a food source for predators of native snakes, causing an increase in native snake populations.
They would form mutualistic relationships with native snakes, since they would occupy the same niche in the ecosystem.
They would compete with native snake species for resources, causing a decline in native snake populations and possibly extinction.
Answers
Answer:
D. They would compete with native snake species for resources, causing a decline in native snake populations and possibly extinction.
Explanation:
Just took the test! :D
They would compete with native snake species for resources, causing a decline in native snake populations and possibly extinction. Hence option D is correct.
What are predators?Predators are living things that go after and kill prey. Both carnivores and omnivores can be predators. Predation can be classified into four categories: carnivory, herbivory, parasitism, and mutualism. Depending on whether or not the victim dies, each sort of predation can be classified.
Predators include weasels, hawks, wolves, mountain lions, and grizzly bears. Because they are carnivores, predators only eat meat.
If a snake species were introduced to an ecosystem where it had no natural predators, it would compete with native snakes. Hence, option D is correct.
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Sometimes we get cramps while doing a strenuous exercise the cause of cramps involves an acid find out what this acid is how it is formed and how it is got rid of
Answers
Cramps during strenuous exercise are often associated with the buildup of lactic acid in the muscles. Lactic acid is formed as a byproduct of anaerobic metabolism when the body is not able to supply enough oxygen to meet the energy demands of the muscles.
During intense exercise, the muscles switch to anaerobic respiration, resulting in the accumulation of lactic acid. To get rid of lactic acid, the body relies on several mechanisms. One of the main ways is through the circulatory system, where the blood carries the lactic acid away from the muscles to the liver. In the liver, lactic acid is converted back into glucose through a process called gluconeogenesis. The glucose can then be used as an energy source or stored for future use.
Additionally, lactic acid can also be metabolized by other tissues and organs in the body. The heart and kidneys, for example, are capable of using lactic acid as a fuel source. The process of removing lactic acid from the muscles and converting it into usable energy or eliminating it from the body helps to alleviate cramps and restore the body's balance.
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Which statement describes how globes represent Earth’s surface? They model all of Earth’s surface. They are flat and two dimensional. They represent underwater features using symbols. They provide detailed information about towns or cities.
Answers
Answer:
they model all of earths surface
Explanation:
i took the test
They model all of Earth's surface describes how globes represent Earth’s surface. Therefore, option (1) is correct.
Three-dimensional globes depict Earth's surface. Globes more accurately depict Earth's shape and dimensions than flat maps. Globes model all of Earth's landmasses, oceans, and other geographic characteristics. For spatial relationships and distances, the globe's spherical shape better represents the Earth's curvature.
Globes show the Earth's rotation and axial tilt, helping humans recognise seasons and time zones. They show political boundaries, terrain, and climate trends. Globes may not provide precise city information due to their three-dimensional structure.
Globes help students understand Earth's geography, interdependence, and spatial linkages, whereas flat maps are utilised for navigation. They remind us that our world is a complex, linked system that needs careful study and protection. Therefore, option (1) is correct.
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Which statement describes how globes represent Earth’s surface?
They model all of Earth’s surface. They are flat and two dimensional. They represent underwater features using symbols. They provide detailed information about towns or cities.True or False: If the plantain plant is removed, the mouse will be able to survive.
True
False
Answers
Answer:
hmm need more details?????????..?
What animals in the phylogenetic tree has a body cavity?
Answers
Answer:
Earth worms,Snails ,starfish I think
2. Describe the importance of oxygen, carbon dioxide, and ozone to living things.
Answers
Answer:
Animals needs oxygen's to survive and plants need carbon dioxide to survive. The ozone layer reflects harmful UV rays from the sun to protect the things living on Earth.
Answer:
oxygen is the source that makes human to live ozone is the home where we live and plant get carbondioxide which we enhale or throw feom our body
Explanation:
the oxygen is very essential for human beings .for example we get oxygen from a peepal tree and carbondioxide which plant get and the surrounding and earth where we live in earth
Which of the following represents a chemical change?
Mowing of grass
Sublimation of ice
Dissolving sugar in water
Charring of a marshmallow
Answers
Answer:
the marshmello
Explanation:
Answer:
charring of a marshmallow
Explanation:
all the rest are physical changes
the mandible is unique among the skull bones because of which of the following characteristics? the mandible is unique among the skull bones because of which of the following characteristics? the mandible is the only bone of the skull that is not paired. the mandible is the only bone of the skull that contains a socketed margin called the alveolar process. the mandible is the only bone of the skull that is not associated with a skull cavity. the mandible is the only bone of the skull that is not joined to the other bones of the skull by immobile sutures.
Answers
The true statement about osmosis is: Osmosis stops when equilibrium is reached, but water movement does not stop. At equilibrium, there is no net movement of water across a semipermeable membrane.
The statement "In osmosis, the movement of water will continue until there is no water remaining" is incorrect. Osmosis ceases when equilibrium is achieved, where the concentration of solutes on both sides of the membrane is equal.
Osmosis is not limited to the movement of water across a selectively or semipermeable membrane in cells alone. It can occur in various scenarios where a membrane selectively allows water passage but restricts the passage of solutes. It is essential to note that osmosis involves the movement of solvent molecules (usually water) and is influenced by the concentration gradient of solutes.
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