DNA is deoxyribonucleic acid, which is insoluble in ethanol. In the process of centrifugation the addition of ethanol can aid to separate protein from its DNA.
What is centrifugation?Centrifugation is a process of separating different molecules in a given sample that have different densities by rotating them in solution around an axis at high speed.
It is the frequently applied techniques in the molecular biology laboratory.
The addition of alcohol or ethanol to the sample followed by centrifugation can separate the proteins from its DNA.
Thus, the substance used to separate the proteins from the DNA is alcohol or ethanol.
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As the pond gets older, the number of plants increases. When they die,
they fall to the bottom of the pond, rot, and become mud. After a very
long time, what do you think will happen to the pond?
A.There will be more water
B.There will be less water
C.There amount of water will stay the same
Obviously C
The water would stay the same the rotten plants would sink and eventually disappear, the water will not increase or decrease
Which of the following is a scientific observation about the bird pictured
below?
Scarlet ibis
A. The pink feathers are especially beautiful.
B.The long beak helps the bird eat insects.
C.The scarlet ibis is the national bird of Trinidad.
D. The bird's features are red.
Answer:
B. the long beak helps the bird eat insects.
Which of the following groups of organisms contains a cell wall?
1. Plantae
11. Animalia
Ill. Fungi
IV. Eubacteria
O A. I, I1, IlI, IV
O B. 1, 11, IM
O C. I1, Ill
O D. I, Ill, IV
A cell wall is present in the kingdoms Archaebacteria , Eubacteriaand Fungi
The groups of organisms containing a cell wall are Plantae, Fungi, and Eubacteria. The correct option is D. I, Ill, IV.
What is a cell wall?A cell is the outer covering of the cell, which provides protection and rigidity to the cell. It is made up of lipid and triglyceride or cellulose. The cell wall is presenting many cells, like plant cells, fungi, and bacteria cells.
The cell wall is made up of different substances in different animals. Plant cells have a cell wall that surrounds their plasma membrane and offers tensile strength as well as defense against osmotic and mechanical stress. Additionally, it enables the development of turgor pressure or the pressure of the contents of the cell against the cell wall.
Thus, the correct option is D. I, Ill, IV.
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5. The burning of fossil fuels has increased the carbon dioxide content of the
atmosphere. What is a possible effect that the increased amount of carbon
dioxide is likely to have on our planet? (SC.6.E.7.9; SC.E.6.7.6)
a. A warmer climate
b. A cooler climate
c. Lower relative humidity
d. More ozone in the atmosphere
One of the possible effects of increased carbon dioxide concentration on our planet would be a warmer climate.
Greenhouse effectCarbon dioxide is one of the numerous greenhouse gases that exist in nature. The gases are responsible for the warming of the planet.
Carbon dioxide and other greenhouse gases form a blanket layer in the atmosphere and trap some of the reflected solar radiations from the sun, preventing them from escaping back to space.
The more the concentration of greenhouse gases in the atmosphere, the more the solar radiation that is trapped and the warmer the earth gets.
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How much faster does sound travel through water than through air?
a/two times faster
b/five times faster
c/four times faster
Answer:
c/ four times
Explanation:
the sound wave travels over four times faster than it would in air
Answer:
four
Explanation:
What is a chromosome?
Answer:
In the nucleus of each cell, the DNA molecule is packaged into thread-like structures called chromosomes. Each chromosome is made up of DNA tightly coiled many times around proteins called histones that support its structure.
Explanation:
Chromosomes are thread-like structures in which DNA is tightly packaged within the nucleus. DNA is coiled around proteins called histones, which provide the structural support. Chromosomes help ensure that DNA is replicated and distributed appropriately during cell division.
Answer: A chromosome is a thread-like structure made up of DNA. Chromosomes are found in the nucleus of each cell
or just DNA makes up a chromosome
Explanation:
hope this help
Please help i'm stuck on this and it's due soon, questions are in the images, will give brainliest!
(the images go with part A and B)
Part A :
In a wooded area in North Carolina, two teenagers discovered an abandoned pistol and a few other items that led them to call 911. Crime scene personnel and investigators processed the scene and found human remains along with other items. They then photographed all the evidence at the crime scene. Analyze the photographs of the skeletal remains and other items and determine the gender and age of the victim.
Part B: Examine visible trauma marks and other evidence found at the crime scene and make a preliminary hypothesis on the cause and manner of death.
Part C:Research four databases and describe how these databases would help you investigate this case.
From the photographs presented, investigation reveals that the gender and age of the victim are:
Age: Elderly, at least 40 years old;Gender; Female. This is clear from the hip and the shoe type discovered as the scene.What is the preliminary hypothesis on the cause and manner of death?The hypothesis or cause of death is a gun shot to the head. This is evidenced by the exhibit 23 - a bullet shell and the hole in the skull of the victim.
The databases that can help with these kind of investigations are:
The Crime DatabaseThe Police Database.Learn more about investigations at:
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HELPPP ASAP!! A population of skunks lives in a woodland habitat. The skunks are unable to leave the habitat because of a large mountain. Describe two reasons this population is not at Hardy-Weinberg Equilibrium.
Some of the conditions are there that must be met for a population or an allele to be in Hardy-Weinberg equilibrium equation are:
1. The population of species must be very large.
2. There must be no migration and population must be isolated in a species.
3. There must be no mutations in a population of species.
4. There must be random mating, which means there are no mating preferences.
So, a population will not be according to Hardy-Weinberg Equilibrium if it is small, or there are , which is not raised, but mutations are expected to occur in future. Skunks can also migrate to another region of a woods despite the presence of a large mountain. As a result of possible mutations and migrations, the population is not in Hardy-Weinberg equilibrium.
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Which of the following is a severe weather consequence that results in crop reduction from lack of precipitation? (4 points)
Drought
Tornadoes
Mold
Floods
The consequence of lack of precipitation is drought.
What is drought?Drought refers to the lack of or inadequate precipitation in an area.
When there is drought, crops suffer from inadequate water. Inadequate water will impair important growth and reproductive processes in plants, resulting in crop failure.
Without adequate water, plants cannot photosynthesize, divide mitotically or meiotically, and the required nutrients for growth become unavailable in the soil.
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Which routine is best suited for muscular endurance?.
When the influenza virus enters into an epithelial cell within the respiratory tract, the infected cell responds by
When the influenza virus enters an epithelial cell, the infected cell responds by posting antigens and acting as a flag for cytotoxic T cells.
What is the cell-mediated response?The cell-mediated response is a type of immune response where the organism is able to respond to pathogens by immune cells.
Macrophages (as well as other immune cells ) can act during cell-mediated immune responses.
In conclusion, when the influenza virus enters an epithelial cell, the infected cell responds by posting antigens and acting as a flag for cytotoxic T cells.
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Which of the following could result in the extinction of a species?
Increased population size will result in the extinction of a species of organisms.
What is Extinction?This is defined as the dying out or disappearance of species as a result of various factors.
When population size increases, it leads to unavailability of food and reduction of species due to starvation and death.
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I need a better understanding
on what so that I can actually help u to answer it fast
In twenty years, if development and impervious surfaces increase to over 30% of the land area in the watershed, explain how the increased stormwater runoff into the river and its tributaries could affect the macroinvertebrates and water quality of the Little Gunpowder River ecosystem.
The increase in the flow of solid particles into the water will upset the delicate balance in the ecosystem.
What is storm water?The term storm water is used to describe the water that drains out after a rainfall. It usually contains many particle which could upset a river ecosystem.
If there is an to over 30% of impervious surfaces, more solid particles will flow into water and could destroy the small invertebrates in water thereby upsetting the balance in the ecosystem as small fishes may no longer fond food to eat.
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What is the first step of the scientific method?
A. Hypotheses
B. Control
C. Question
Answer:
C. Question
Explanation:
How Is The Fruit Like A Dichotomous Key?
Answer:
apple tree, water-lily, fir tree, dandelion, astroturf, seaweed. Dichotomous keys may be simple or complex depending on what is being identified.
Explanation:
how do bacteria cause disease?
how do organs work together to form specific functions
Answer:
Sistemas orgánicos
Explanation:
Aunque cada órgano del cuerpo realiza sus funciones específicas, los órganos también funcionan juntos por grupos, a los que se denomina sistemas orgánicos (ver Principales sistemas orgánicos). Los médicos clasifican las enfermedades y sus propias especialidades médicas de acuerdo a los diferentes sistemas orgánicos.
2. why is returning by-catch to the sea not always useful as it might appear?
Returning by-catch to the sea is not always useful as the sudden change in pressure will result in damage to internal organs of fishes.
What is by-catch?By-catch refers to other sea animals which are caught along with the intended catch in a fishing expedition.
In some instances some people tend to return by-catch to the sea.
However, this is not always useful as the pressure above sea level or on the sea surface is less than that in the depths of the sea.
A sudden change in pressure will result in damage to internal organs of fishes.
Therefore, returning by-catch to the sea not always useful as it might appear.
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Changes in environmental conditions always result in new ecosystems and loss of biodiversity characterized by an increase in the number of some species, the evolution of new species, and the extinction of some species.
Changes to the environmental conditions can indeed result in new ecosystems and a change in the species equilibrium.
Ecosystem disruptionThe abiotic conditions of an ecosystem determine the kind of species that will inhabit the ecosystem
A change to the abiotic or environmental conditions will likely result in a new ecosystem entirely. Organisms that are able to adapt to the changes will gradually fade off the ecosystem while those that are able to withstand the changes will proliferate and dominate the populations of organisms in the ecosystem.
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Where are some places where carbon is found?
Answer:
rocks and sediments, while the rest is located in the ocean, atmosphere, and in living organisms.
Explanation:
carbo is found in these places for example:
Question 12 of 30 Which of the following best describes the goal of technology? A. To apply scientific knowledge to ethical decision making B. To use scientific knowledge to solve problems or to make tasks easier C. To make more industrial jobs D. To improve the economy
Identify at least one environmental, economic, social, and political issue for population growth(human)
Answer:
Overpopulation is associated with negative environmental and economic outcomes ranging from the impacts of over-farming, deforestation, and water pollution to eutrophication and global warming.
Explanation:
These are some environmental problems, due to human population growth.
Be able to explain how different “links' ' can show a relation between two species. Explain what evidence shows different correlations and causations between the two species.
Links can show ecological relationships between two species such as parasitism, commensalism or predation.
What are ecological links between species?The ecological links or relationships between species can be defined as biological interactions between them.
Moreover, correlation in biology indicates a statistical association while causation indicates a modification in a variable that leads to a modification in another.
In conclusion, links can show ecological relationships between two species such as parasitism, commensalism or predation.
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The carbon cycle involves an exchange of carbon between _______.
a.
the geosphere and atmosphere
b.
the atmosphere and hydrosphere
c.
the geosphere and hydrosphere
d.
the geosphere, hydrosphere, and atmosphere
Answer:
D
Explanation:
In addition to cytoplasm, most human body cells also have.
Answer:
Nucleus
Explanation:
There are many answers but some are :
Nucleus , Cell membrane , mitochondria , ribosomes
Hope this helped and have a good day
All cells contain cytoplasm, which is made up of cytosol, a jelly-like substance. The cytosol holds the internal structures in suspension.
What is the function of cell organelle in different cells?In addition to the nucleus, eukaryotic cells also have other organelles. An organelle is a cytoplasmic structure that serves a specialized purpose for the cell.
For instance, organelles called vacuoles store materials in the cell, whereas organelles called mitochondria supply energy.
The space between the plasma membrane and the nuclear envelope is known as the cytoplasm in eukaryotic cells, which have a nucleus.
The term “cytoplasm” refers to the entire inside the plasma membrane in prokaryotes, which are without a nucleus.
Therefore, Some cells additionally have a nucleus, cell membrane, mitochondria, and ribosomes in addition to their cytoplasm.
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what happens when a cold front replaces a warm front
Answer:
When a cold front overtakes a warm front, it creates what's called an occluded front that forces warm air above a frontal boundary of cooler air masses.
Identify the technique that the scientists used to remove the ZRS DNA from mice and replace it with the ZRS section from snakes
The techniques used to remove the ZRS DNA from mice and replace it with the ZRS section from snakes are gene editing (CRISPR/CAS9) and gene splicing.
What is CRISPR/CAS9?The CRISPR/CAS9 tool is a genome editing system used in molecular biology laboratories to insert genetic sequences.
The CRISPR/CAS9 system has a high specificity to make genetic modifications in the laboratory.
In conclusion, the techniques used to remove the ZRS DNA from mice and replace it with the ZRS section from snakes are gene editing (CRISPR/CAS9) and gene splicing.
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Which part of the nervous system is the first to respond when Joshue feels a raindrop fall on his arm?
Answer:
The right answer is the sensory neuron.
Explanation:
The sensory neuron, or sensory neuron, is a neuron located in a sensory ganglion that plays a role in the perception of a stimulus. Sensory neurons are often referred to as "afferent fibers". For example, a sensory neuron can be used for the perception of heat, or contact with an object.
e
00
O
O
O
D
00
O
A
B
Which of the following states why one of the models is better for moving
more nutrients in and out of the cell?
A. B is better because it has more surface area.
B. B is better because it has more volume.
C. A is better because it has more volume.
D. A is better because it has less surface area.
Answer:
A
Explanation:
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