Where is the organized form of DNA?
Answers
Chromosome is the final organized form of DNA which is present within the nucleus.
Cells enclose their DNA strands all over scaffolding proteins to construct chromatin, a coiled compressed structure inside the nucleus. Chromatin is hence rolled up into higher powers of structure, resulting in the distinctive shape of chromosomes.
The DNA molecule is encapsulated into thread-like structures known as chromosomes in the nucleus of each cell. Each chromosome is composed of DNA that has been tightly coiled many times around proteins known as histones that support its structure. Chromatin coils tightly and compresses to create chromosomes when a cell is poised to divide.
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Related Questions
In the next generation, this population has 14 HH members, 63 Hh, and 74 hh. Is the population in equilibrium? Answer either yes or no.
Answers
There should be more individuals with the dominant trait so the population is not in equilibrium.
Answer:
In the next generation, this population has 14 HH members, 63 Hh, and 74 hh. Is the population in equilibrium? Answer either yes or no.
NO
Explanation:
got it right on edge 2020
If all of our senses ultimately send the same kind of electrical signals to the brain, how do we end up with our distinct sensory and perceptual experiences?.
Answers
Since the senses are received by different parts of the brain according to the situation of the body, that is why we have distinct sensory and perceptual experiences.
Senses are the ability of the body to feel the changes or happenings around their body. This action is mediated by the different organs and regulated by the brain.
Brain is the center for the regulation of all the activities of the body. It resides inside the skull where it is protected from injuries. The brain is divided into left and right hemispheres and has three parts: the forebrain, the midbrain and the hindbrain. Different parts of the brain regulate different actions of the body.
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How does energy transfer from the hot water to the cold air
Answers
Answer:
humidity and evaporation
Explanation:
A crocodile-like morphology evolved independently in a group of Triassic reptiles called phytosaurs, and later, after phytosaurs were extinct, in true crocodiles. This is an example of: Sympatric speciation. Iterative evolution Evolutionary drift Genetic drift Lamarckian evolution
Answers
The correct answer is iterative evolution. A crocodile-like morphology evolved independently in a group of Triassic reptiles called phytosaurs, and later, after phytosaurs were extinct, in true crocodiles. This is an example of iterative evolution.
Iterative evolution is the development of similar structures or forms independently over time in separate lineages. This is frequently seen in unrelated lineages of organisms that evolve similar features through convergent evolution. The crocodile-like morphology that evolved independently in Triassic reptiles called phytosaurs and later in true crocodiles is an example of iterative evolution as they evolved independently in separate lineages. The ability of the phytosaurs to thrive in an aquatic environment likely contributed to the development of this morphology, which later allowed true crocodiles to similarly thrive.
Phytosaurs as flying birds:
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what is “the cell cycles” role in human cells.
Answers
Check the organelles you think belong only in a
plant cell.
nucleus
chloroplasts
cell wall
Answers
Nucleus store dna
Chloroplasts conduct photosynthesis
Cell wall gives the plant structure
which list of three terms best describes innate immunity? group of answer choices quick, nonspecific, and unchanged from birth mucous membranes, t cells, and b cells slow, specific, and unchanged from birth specific, specialized, and antibodies antibodies, complement, and phagocytosis
Answers
Protect the body against foreign pathogens, remove dead or damaged tissues and cells, recognize and remove abnormal self cells.
A series of physical barriers, chemical barriers, antimicrobial agents, and cells that prevent infection no matter what pathogen is invading. Innate immune responses represent the first line of defense against invading pathogens because the innate immune response provides general protection against a wide variety of pathogens. Through antimicrobial peptides, mucosal and skin barriers, complement antibodies, etc. Innate immunity, also known as the non specific immune system, comprises the cells and mechanisms that defend the host against infection by other organisms in a non specific manner. The innate immune response is carried out by sentinel cells such as monocytes or macrophages and dendritic cells and by receptors known as pattern recognition receptors.
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20 points and will mark brainliest! Please explain how you got it though
Answers
Answer:
crossing over during meiosis
Explanation:
i just had biology last semester hope this helps
in the tree above, which character is an example of an autapomorphy? limbs. lungs. amniotic egg hole in skull in front of eye socket fused bones form carapace
Answers
The character that is an example of an autapomorphy is fused bones that form a carapace, the correct option is (c).
The one that could be an example of autapomorphy is the fused bones that form a carapace. This is a characteristic that is unique to turtles, which are the only group of reptiles with a fully fused bony shell that protects their body.
No other taxonomic group or species possesses this specific trait, making it an example of an autapomorphy for turtles. The other characters mentioned, such as limbs, lungs, and the hole in the skull in front of the eye socket, are shared by many different taxa and are not unique, the correct option is (c).
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The complete question is:
In the tree above, which character is an example of an autapomorphy?
a. Lungs.
b. Limbs.
c. Fused bones form carapace
d. Amniotic egg
e. Hole in the skull in front of the eye socket
15. Briefly explain how the gel (or DNA fingerprint) is made after DNA has been amplified.
Answers
Answer:
Like the fingerprints that came into use by detectives and police labs during the 1930s, each person has a unique DNA fingerprint. Unlike a conventional fingerprint that occurs only on the fingertips and can be altered by surgery, a DNA fingerprint is the same for every cell, tissue, and organ of a person. It cannot be altered by any known treatment. Consequently, DNA fingerprinting is rapidly becoming the primary method for identifying and distinguishing among individual human beings. DNA fingerprints are also useful in several applications of human health care research and for diagnosis of inherited disorders. DNA fingerprinting is often used in the justice system to link suspects to biological evidence and solve paternity cases.
Explanation:
DNA sample: A DNA sample that will be examined must first be gathered. DNA extraction: Using the lysis process, DNA is then extracted from the sample.
What is DNA fingerprint?Restrictions endonucleases:The DNA fragment is cut at a particular place by a specific restriction enzyme.
Alec Jeffrey, a British biologist, created the DNA fingerprinting technique in 1984 after noticing that some highly variable DNA sequences, or minisatellites, that are repeated inside genes but do not affect their activities.
In DNA fingerprinting, a gel-like fluid is used to distinguish between DNA molecules that move at various speeds. A DNA molecule that is huge moves slowly, whereas a DNA molecule that is little moves quickly.
Therefore, DNA molecules are divided in gel electrophoresis according to size. When DNA molecules are divided into distinct sizes, bands of DNA are created.
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how do radiation, conduction, and convection affect the atmosphere?
Answers
Answer:
Conduction, radiation and convection all play a role in moving heat between Earth's surface and the atmosphere. Since air is a poor conductor, most energy transfer by conduction occurs right near Earth's surface. Conduction directly affects air temperature only a few centimeters into the atmosphere.
Explanation:
#KEEP LEARNING
In 1978, scientists studied how the fitness of marine sticklebacks would be affected if they were introduced into a freshwater environment. They collected 90 male and 90 female sticklebacks from a marine population and 10 male and 10 female sticklebacks from a freshwater population. The 200 sticklebacks were introduced into a freshwater environment that had no stickleback fish previously.
Recently a scientist decided to repeat this study, but relocated a population of sticklebacks from a freshwater environment into a marine environment. Which of the following best predicts how the frequency of the allele would change over time if a population of sticklebacks from a freshwater environment was placed into a marine environment?
Answers
The frequency of alleles in the population started low and continued to increase over time.
What is frequency of alleles?The frequency of alleles refers to the ratio of the number of times an allele occurs to the copies of all the alleles at that particular genetic locus in the given population.
We can see that the sticklebacks had a greater number of those introduced from marine to fresh water hence of the 200 sticklebacks, the frequency of alleles in the population started low and continued to increase over time.
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Within physiological limits, a slowing of heart rate allows for a longer ventricular diastolic filling time. This results in:
a. a reduction in blood pressure
b. a larger stroke volume
c. a more forceful systolic ventricular contraction.
Answers
A slowing of heart rate allows for a longer ventricular diastolic filling time, which can lead to a larger stroke volume and a more forceful systolic ventricular contraction. The correct answer is option c.
During diastole, the heart is relaxed, and blood is able to flow into the ventricles. The longer the ventricular diastolic filling time, the more blood is able to fill the ventricles, leading to a larger volume of blood that can be pumped out during systole.
This increased stroke volume, combined with a more forceful contraction, results in a greater amount of blood being ejected with each heartbeat.
However, it is important to note that a slowing of heart rate also has the potential to lead to a reduction in blood pressure.
This is because a slower heart rate means that there are fewer contractions per minute, which can result in a lower overall cardiac output. Cardiac output is the amount of blood that the heart pumps out per minute, and if it is reduced, then blood pressure may also decrease.
The correct answer is option c.
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a student wanted to observe dividing cells under a microscope
the student squashed the root tip of an onion plant on a microscope slide.
describe how the student should use a light microscope to view the squashed root tip
Answers
The student can view the squashed root tip through the microscope by;
placing the slide on the microscope stage and holding it in place using the stage clips Looking through the eyepiece lens and adjusting the objective lens until a clear image is obtained.What is a microscope?A microscope is an instrument used in the laboratory to view objects that cannot be seen with the unaided eye clearly.
These objects are in the microscopic size scale level.
Microscopes usually have two lenses; the objective lens and the magnification lens.
A proper adjustment of the objective lens and the eyepiece lens enables the clear visualization of a microscopic object.
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Cichlid fish from Lake Apoyeque, Nicaragua, have begun to develop distinct morphologies that allow them to eat different foods within the same lake. If these fish never fully speciate but continue to produce fit hybrids over a long period of time, what will be the result
Answers
Stability will be the outcome if these fish never fully speciate but instead continue to generate healthy hybrids over an extended period of time. In this environment, two different species of cichlids coexist in the same area but have evolved distinct morphologies that enable them to consume various types of food.
The lakes of Nicaragua offer a perfect continent-like backdrop for examining the patterns of colonisation of both fish and their parasites.For instance, certain species of cichlids virtually entirely eat the scales of other fish in all three lakes.The interfertility of morphologically dissimilar populations is frequently discovered, and the existence of reproductive isolation within nominal morphological species reveals the existence of cryptic species.
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Cichlid fish from Lake Apoyeque, Nicaragua, have begun to develop distinct morphologies that allow them to eat different foods within the same lake. If these fish never fully speciate but continue to produce fit hybrids over a long period of time, what will be the result?
Which of the following describes the basic shape of a water molecule?
Answers
The basic shape of a water molecule can be described as bent or V-shaped. The water molecule consists of two hydrogen atoms and one oxygen atom, with a molecular formula of H2O.
The basic shape of a water molecule is described as bent or V-shaped. A water molecule consists of two hydrogen atoms bonded to a central oxygen atom. The arrangement of the atoms creates an angle of approximately 104.5 degrees, resulting in a bent shape. This bent shape is due to the repulsion between the lone pairs of electrons on the oxygen atom, which pushes the hydrogen atoms closer together.
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You want to know if music increases productivity in the workplace. One group of employees listens to music while they work. Another group does not listen to music. Productivity is measured at the end of each month. What is the independent variable?
Answers
Answer:
The independent variable is one that is controlled to corroborate its effects or the relationship causes consequence with a phenomenon in relation to the dependent variable.
Explanation:
In an epidemiological study, or a research based on a hypothesis, there are different variables.
Variables are those phenomena that vary over time and can be quantifiable over time.
The quantification of the variables must be through indexes or analysis, and these in turn must confer data reliability.
On the other hand, there are two types of variables, dependent and independent, homogeneous or non-homogeneous (that is, they occur in one individual or in many at the same time) and if they are reasonable or not in the face of a given investigation.
If the variable that is chosen in an investigation is not reasonable or homogeneous, it will never become independent or dependent since it will not be good to take it into account or count it during the investigation.
In this case, the possible variables could be: the type of music, different levels of hearing by the workers, the type of work they do when listening to music, the volume of the music in which it is heard.
In griffith’s experiments, what made the harmless r cells grow capsules when exposed to heat-killed s cells?.
Answers
In Griffith’s experiments, DNA made the harmless r cells grow capsules when exposed to heat-killed s cells.
What is an experiment?An experiment is a study which is done to provide an answer to a research question or an observation.
Experiments are done to prove or disprove hypothesis about an observation.
In Griffith’s experiments, harmless r cells grew capsules when exposed to heat-killed s cells. This was because of the DNA which were responsible for production of the protein capsules.
In conclusion, DNA are used to synthesize proteins.
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Question 1 (1 point)
Read the following description:
These organisms are large predators. They have been known to eat other carnivores and herbivores. Although these organisms are very successful, their population has been greatly threatened by humans.
Which of the following best fits the description of these organisms?
Question 1 options:
level one: photoautotrophs
level two: herbivores
level three: carnivores
level four: top predators
Answers
Large predators that feed on other carnivores and herbivores but are threatened by humans are best described as top predators.
An organism that feeds on another organism is known as a predator. The organism it feeds on is known as the prey.
In a typical ecosystem, top predators are organisms that exist at the top of the ecosystem's food chain without themselves being prey to any natural predator. Thus, such organisms have the capability to interact with humans in different ways, including being hunted down as food or pets.
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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 :)
Consider the following statement and the diagrams below and answer the questions. *Permanent tissues displaced a variety of shapes and cell wall features that are related to their functions in the plant.
Answers
Option a is parenchyma, option B is collenchyma, and option C is scelerenchyme. All three of these are types of plant tissues that provide structural support and perform various functions in plants.
Parenchyma is one most the common and versatile type of plant tissue that consists of living cells with thin cell walls. Parenchyma cells are generally isodiametric, and they have large central vacuoles. The cells can store nutrients such as starch, proteins, and water, and take part in photosynthesis and gas exchange. Collenchyma cells have an elongated shape, and also providing flexible support and thickened cell wall etc. Sclerenchyma cells provide rigid support to plant organs and help with conductivity too.
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What is the desertification of the sahara? question 14 options: the expansion of the sahara desert the study of the sahara desert the shrinking of the sahara desert the population of the sahara desert
Answers
Desertification is the change of a normal land in desert. The expansion of the Sahara desert refers to the desertification of the Sahara.
What is Sahara desert?Sahara desert is in Morocco. It is famous for its variety of land features but is most famous because of sand dune fields.
Desertification can leads to the reduction of the vegetation-covered area. The Sahara desert also is constantly expanding at a faster rate.
The cause of Sahara desertification includes both natural processes such as climate and human activities.
Thus the correct option is A.
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Where are the high tides if the moon is in first quarter?
Answers
The first and third halves of the moon, when the moon seems to be "half full," are when neap tides occur.
When tides are at their peak, where is the moon?Every month, at perigee, when the moon is closest to Earth, tidal-generating forces are stronger than usual, resulting in tide ranges that are higher than typical. When the moon is at its furthest distance from Earth, or apogee, about two weeks later, the lunar tide-raising effect is weaker and the tidal ranges are smaller than usual.
How does a first quarter moon affect things?The Moon is facing the Earth and Sun at a 90-degree angle during this phase. The Moon appears to be partially lighted and partially in shadow. We observe what appears to be the right half during the first quarter.
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A completely heterozygous A+ blood typed man has children with a woman who is completely heterozygous B+ blood type. How many different possible phenotypes could their children be?
Answers
Answer: Heterozygous A+ and B+ can form phenotypes such as AB+, A+, B+, O.
Explanation:
Using the punnet square, Heterozygous A+ combination with B+ can form phenotypes AB+, A+, B+, O. Below is an attachment that explains it better.
Reference: Google.
I need help Please!!!
Answers
Answer:
it is option - B - An abandoned field
Answer:
b
Explanation:
I just think it is b.
1. Based on the model shown at the right, what organisms should have the smallest population numbers in an ecosystem?
2. Based on the model to the right, why is the producer level the largest level?
Answers
Answer: 1. Tertiary consumers.
2. (Quoting from study.com) "There are many more producers in a food chain than consumers or decomposers because only 10% of the energy from each energy level is passed on to the next energy level."
(Quoting from byjus.com)"As producers form the base of the energy pyramid, they are generally the largest population. And since energy is lost at each trophic level as heat, the pyramid tapers, indicating a reduction is biomass and hence numbers as you go up the levels."
This is based from what I see in the picture, so I don't know whether these are acceptable answers or not. Hope it helps though.
Are bats blind?Non scientific or scientific question?
Answers
Answer:Bats are not blind and can in fact see quite well using their eyes. While most bats do have advanced ears that give them a form of vision in the dark known as echolocation, these good ears does not require them to have bad eye
How can one wrong base pair impact a whole organism?
Answers
Answer:
An organism's DNA affects how it looks, how it behaves, and its physiology. So a change in an organism's DNA can cause changes in all aspects of its life. Mutations are essential to evolution; they are the raw material of genetic variation. Without modification, growth could not occur. i hope this help
Explanation:
how does the author compare gold and silver
Answers
Answer:
One question! Which author are you talking about?
Explanation:
Why is DNA replication sometimes referred to as a "semi-conservative"
process?
1. It only uses new stands of DNA.
2. It consist of 2 original and 2 new strands
3. It only uses old strands.
4. All the above is incorrect