Answer:
A) A Randomized Control Trial Experiment is done
B) Dependent Variable is Bone Mineral Density
Explanation:
Experimental Design:
Subjects (women) of the same age bracket (say 60-70) and having approximately the same baseline estrogen level, are recruited for the experiment, and randomly assigned into two groups of an equal number of subjects each; the test group and the control group.
The Test group is given a certain amount of estrogen supplements throughout the period of the study
The control group is given a placebo, identical to the supplements given to the test group, but without any medical significance.
Every other factor is held constant for both groups of subject throughout the period of the experiment.
After, the period of the study, the Bone Mineral Density is measured in the subjects. The Bone Mineral Density is a Radiographic Test that detects the amount of light the bone can absorb, and this is directly proportional to the health of bones. One with osteoporosis will have a less dense bone than one without Osteoporosis.
B) From the experimental design above, the independent variable is; presence or absence of estrogen supplements, while the outcome/dependent variable is Bone Mineral Density.
When plasmids are mixed with histones, they will bind fewer histones than the equivalent length of linear DNA. Upon addition of a topoisomerase, more histones will be bound. Explain this observation.
Answer:
Topoisomerases relax the positive supercoil of the plasmid when histones bind, thereby allowing for more histones to bind.
Explanation:
Plasmids are closed-circular DNA. Unlike linear DNA which can bind a greater number of histone molecules due to greater freedom of rotation, when plasmids binds to a histone molecule, a negative supercoil is introduced in the plasmid. However, since the plasmid is closed and the DNA is not broken, a compensatory positive supercoil in the unbound region of DNA is introduced. This limits further binding of histone molecules to the plasmids.
However, with the introduction of topoisomerases, they relax the positive supercoils, thereby stabilizing the negative supercoil. Further binding of histone molecules are initiated with the formation of negative supercoils and relaxing of positive supercoils result in more histone molecules bindingd to the plasmids.
The law of conservation of mass states that during a reactions atoms are
________.
destroyed
created
rearranged
WHATS THE DEFFINITION OF HELLO??????????? ANSER FAST >:C
Answer:
It mean are you there
Explanation:
is this a real question
Hello, it's me
I was wondering if after all these years you'd like to meet
To go over everything
They say that time's supposed to heal ya
But I ain't done much healing
Hello, can you hear me?
I'm in California dreaming about who we used to be
When we were younger and free
I've forgotten how it felt before the world fell at our feet
There's such a difference between us
And a million miles
Hello from the other side
I must've called a thousand times
To tell you I'm sorry
For everything that I've done
But when I call you never
Seem to be home
Hello from the outside
At least I can say that I've tried
To tell you I'm sorry
For breaking your heart
But it don't matter, it clearly
Doesn't tear you apart anymore
1. Tendons and ligaments are similar because they both have: a limited blood supply and low metabolism an abundant blood supply and low metabolism a limited blood supply and high metabolism an abundant blood supply and high metabolism 2. What is the name of the outer layer of connective tissue on skeletal muscle
Answer:
1 a limited blood supply and low metabolism
2. Epimysium
Explanation:
1.
The similarity that exists between tendons and ligaments from the question is low blood supply and also low metabolism. Ligaments do connect one bone to another bone while tendons connect bones to muscles.
2. Epimysium is the outermost layer of connective tissue that surrounds a skeletal muscle it is a Connective tissue layer which surrounds an individual muscle.
Did humans evolve from sharks?
Answer:
I'f a sjw can identity as a moose humans definitely evolved from sharkes
Explanation:
read if again hore
The most important prevention measure is controlling
temperature.
and
A
flavor
B
color
с
texture
D
time
Answer:
d.time
Explanation:
why would gel filtration chromatography be the best method for purifying an antigen for injection into a mouse to generate monoclonal antibodies
Answer: The question is incomplete and the options are not given, from my searches I was able to get the completed part which are;
A. Antibodies can be used to detect the antigen on a western blot
B. Antigens can be centrifuged through a column and pellet at specific speeds C. Antigens can easily be purified by charge and size when coated with SDS D. Antigens will separate by size going through the column beads and their holes
E. Organelles containing the antigen will have a specific buoyancy and separate in a gradient.
The correct option is D.
Antigens will separate by size going through the column beads and their holes
Antibodies can be used to detect the antigen on a western blot
Explanation:
The best method for purifying an antigen for injection into a mouse to generate monoclonal antibodies by gel filtration chromatography is Antigens will separate by size going through the column beads and their holes because Gel filtration chromatography is a size exclusion chromatography that work on the principle that molecules are separated based on their big sizers or larger sizes. The columns are designed to remove substances that are smaller in sizes. The larger size antigen elute first.
How much will atmospheric carbon change in one year ? In 10 years ? In 100 years ?
Answer:
in 1 year
854
in 10 years
890
in 100 years
1250
Explanation:
gizmo :)
The atmospheric carbon change that will be witnessed in 1, 10, and 100 years will be 854, 890, and 1250 years.
Carbon is an important element for all the firms of life that are on Earth. It should be noted that life forms take in carbon to manufacture food and also release carbon that's needed for respiration.
The intake and output of carbon are important to plant and animal life. The atmospheric carbon change that will be witnessed in 1, 10, and 100 years will be 854, 890, and 1250 years. Climatic change has been a factor in the increase in the amount of carbon dioxide that's in the atmosphere.
Read related link on:
https://brainly.com/question/16658688
The process of natural selection favors certain characteristics in organisms, while it selects against other characteristics.What would happen if there was zero variation between all of the organisms on Earth?
The improvement of animal genetics over time requires detailed
____ & ___ of performance and genetic
information throughout generations.
Answer:
easy
Explanation:
results,details
Fill in the blanks with the correct word
1- the male reproductive cell is called______
2- the female reproductive is called_______
3- when the male and female reproductive cells join during fertilization a_____ forms
Answer:
1. sperm
2. ova
3. zygote
Explanation:
3) A student conducts an investigation involving the identification all species of plants and animals within an area of a forest. What level of ecological organization is the student studying? A) Population B) Community C) Biosphere D) Ecosystem
Answer:
D. Ecosystem
Explanation:
Sana nakatulong!!
The organelle that is made up of DNA:
Which of these involves estimating the size of a population by counting only the members of the population in a particular area and then using this to estimate the size of the entire population over its
entire inhabited area?
sampling
population index
counting the entire population
mark-and-recapture
Answer:
counting the entire population
The term that involves estimating the size of a population by counting only the members of the population in a particular area is counting the entire population. The correct option is C.
What is a population?The population is a term that is used for the number of people or particular species present in a specific area. The population of humans is calculated in specific areas.
The population growth rate is estimated by calculating the population of a particular place. This can be calculated by using the estimated size of the entire population over its entire inhabited area.
The death rate is minus from the population to get the growth rate of the population. The death rate is the number of people who died due to natural causes.
Thus, the correct option is C. counting the entire population.
To learn more about the population, refer to the link:
https://brainly.com/question/16138725
#SPJ5
Water molecules attract one another via:
Answer:
Hydrogen Bonds
The slight positive charges on the hydrogen atoms in a water molecule attract the slight negative charges on the oxygen atoms of other water molecules. This tiny force of attraction is called a hydrogen bond. This bond is very weak.
Explanation:
hope this helps you ✌️✌️
[tex]hii[/tex]
When communities form in previous uninhabited areas, this is called...?
Answer:
sucession
Explanation:
The periodic table is arranged according to ________________ atomic number.
Answer:
In the periodic table the elements are arranged in columns and rows according to increasing atomic number atomic number,
Explanation:
how is cell differentiation different than mitosis
a. cell differentiation only occurs after a wound
b. cell differentiation produces cells with different gene expressions
c. cell differentiation does not cause proliferation
d. cell differentiation produces cells with different DNA
Explain the results of the experiment in which the diffusion bag contained 15% fructooligosaccharides.
Capillary walls are only one layer of cells thick. Passage of oxygen into and out of the capillaries is controlled most by which process? A. collection of waste material
B. breakdown of materials
C. diffusion of material
D. storage of materials
Answer:
A. collection of waste material or diffusion of material
Explanation:The walls consist of a very thin layer of epithelial tissue encased in a moist membrane which enables the diffusion of nutrients and oxygen out of the blood and the diffusion of waste products into the blood
Capillary walls are only one layer thick cell layer. Passage of oxygen in and out of the capillaries is controlled mostly by the process of collection of waste materials. Thus, the correct option is A.
What are blood vessels?
Blood vessels are the channels through which blood is distributed to all the body tissues. The vessels make up the two closed systems of tubes that begin and end at the heart. One system is the pulmonary vessels, which transports blood from the right ventricle to the lungs and back to the left atrium.
There are three types of blood vessels which are arteries, veins, and capillaries. These vessels plays a very specific role in the circulation process in the body. Arteries carry the oxygenated blood away from the heart to the other tissues. Veins carry the deoxygenated blood form the body tissues to the heart and lungs and capillaries make the passage between these blood vessels.
Therefore, the correct option is A.
Learn more about Blood vessels here:
https://brainly.com/question/4601677
#SPJ2
The oxygen used by animals and plants during cellular respiration came from where
What is the result of meiosis ll
four diploid daughter cells are going to be formed
g The Drosophila melanogaster genome contains approximately 24 million bases of exon sequence, 20 million bases of intron sequence, and 76 million bases of intergenic sequence. Calculate and compare the percentages of exon and intron sequences in Drosophila melanogaster genome to that of the human genome.
Answer:
When it is compared to the human genome, the Drosophila melanogaster genome contains a higher proportion of exons (20%) and a minor proportion of introns (16.6%).
Explanation:
The Drosophila melanogaster genome contains 24 million bases (Mb) encoded by exons + 20 Mb introns + 76 Mb intergenic sequences = 120 Mb >>
- Exon sequences= (24 x 100)/120: 20 %
- Intron sequences= (20 x 100)/120: 16.6 %
- Intergenic sequences= (76 x 100)/120: 63.3 %
On the other hand, the completion of the human genome sequencing showed that only 1.1% encodes proteins (i.e., they are exons), 24% are introns, and 75% are intergenic sequences. Moreover, it is also important to highlight that the D. melanogaster genome contains about 13,000 protein-coding genes, while the human genome contains nearly 22,000-30,000 protein-coding genes.
Muscles which are made of numerous fibers are called
A. smooth
B. striated
C. cardiac
Answer:
Your answer would be striated
Explanation:
Muscles that are made of numerous "stringy" fibers are often called striated
Give a scientific reason of the following:
Soil temprature plays an important role in chemical reactions.
Answer: Soil temperature directly affects plant growth. Most soil organisms function best at an optimum soil temperature. Soil temperature impacts the rate of nitrifi- cation. It also influences soil moisture content, aeration and availability of plant nutrients.
Explain how each of Newton's Laws are demonstrated when a person plays golf. You may bullet your explanations as 1st, 2nd and 3rd Law.
Explain how a carbon atom in carbon dioxide becomes a hydrocarbon and organic compound before becoming carbon dioxide again.
Answer:
See below
Explanation:
Used in photosynthesis to become glucose, converted into glycogen in the body. Lipogenesis then converts it into fat, which is then again metabolized in respiration to become CO2
Carbon dioxide is consumed by plants and converted into hydrocarbon compound glucose by photosynthesis and during cellular respiration, hydrocarbon is released to carbon dioxide again to release into the atmosphere.
What is photosynthesis?Water and carbon dioxide are converted into oxygen and glucose in photosynthesis, plant takes glucose and generates oxygen as a byproduct.
Oxygen and glucose are converted into water and carbon dioxide in cellular respiration. The by-products of the process include carbon dioxide, water, and ATP, which would be turned into energy.
During cellular respiration, hydrocarbon is released to carbon dioxide again to release into the atmosphere. The process of respiration involves the production of carbon dioxide and water as a result of the breakdown of carbohydrates.
Therefore carbon dioxide is converted to hydrocarbon and during cellular respiration is again released as CO2.
Learn more about photosynthesis, here:
https://brainly.com/question/9175642
#SPJ2
A byproduct of respiration is what?
Answer:
Carbon dioxide and water are byproducts of cellular respiration
A person is admitted into the hospital with an unknown ailment. The patient is seen by Triage
and immediately put on intravenous liquid or more commonly known as an IV by a brand-new
nurse. Unfortunately for the patient, the nurse did not properly prepare the IV, and hooked the
patient to an IV fluid line consisting only of distilled water. HELP!!
Answer:
D)The environment in the patient's cells will be hypertonic and will cause the cells to burst.
Explanation:
A person is admitted into the hospital with an unknown ailment. The patient is seen by Triage and immediately put on intravenous liquid or more commonly known as an IV by a brand-new nurse. Unfortunately for the patient, the nurse did not properly prepare the IV, and hooked the patient to an IV fluid line consisting only of distilled water.
A)The environment in the patient's blood will be isotonic if the cells and their environment have reached equilibrium the cells will remain the same size.
B)The environment inside and outside of the patient's cells will be isotonic and may cause the cells to burst.
C) The environment in the patient's cells will be hypotonic and will cause the cells to shrink.
D)The environment in the patient's cells will be hypertonic and will cause the cells to burst.
So what happens when people get an IV is an intravenous solution that goes straight to the blood flow, helping immidiately the person that needs the medicine, in this case, the person is only getting distilled water, this can create an hypertonic environment which happens when there's too much water outside the cell, and eventually it gets inside the cell, this make it burst caus it can no longer contain more water inside of it. so the correct answer would be:
D)The environment in the patient's cells will be hypertonic and will cause the cells to burst.
Which life process can be defined as creating energy from the food that you eat?
a)Mitochondria / mitocondrias
b)Respiration / respiración
c)Nutrition / nutrición
d)Growth / crecimiento
please help me