Answer:
I believe the answer is B
Explanation:
It can't be D tho
Why are stem cells harvested from early embryos useful in medicine?
Answer: Cell therapies would use stem cells, or cells grown from stem cells, to replace or rejuvenate damaged tissue. Scientists also want to use stem cells to understand disease and find drugs that might treat it. Embryonic stem cells could be used to make more specialized tissues that have been lost to disease and injury.
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When the concentration of molecules is the same throughout the space the molecules
occupy, the molecules are in
Explanation:
Diffusion will eventually cause the concentration of molecules to be the same throughout the space the molecules occupy, when they will be in equilibrium.
What is the atomic number of this atom?a,b,c
08
13
09
o 5
4,
Answer:
oxygen has the atomic number 8
13 is aluminum
09 is fluorine
05 is boron
4 beryllium
If the frequency of the black allele for the moth coloration gene in newly founded island population of moths in genetic draft lab simulation was 78% what was the frequency of the white allele in that same population at the same time?
Answer:
The evolution of the peppered moth is an evolutionary instance of directional colour change in the moth population as a consequence of air pollution during the Industrial Revolution. The frequency of dark-coloured moths increased at that time, an example of industrial melanism. Later, when pollution was reduced, the light-coloured form again predominated. Industrial melanism in the peppered moth was an early test of Charles Darwin's natural selection in action, and remains as a classic example in the teaching of evolution.[1][2] In 1978 Sewall Wright described it as "the clearest case in which a conspicuous evolutionary process has actually been observed."
The dark-coloured or melanic form of the peppered moth (var. carbonaria) was not known before 1811. After field collection in 1848 from Manchester, an industrial city in England, the frequency of the variety was found to have increased drastically. By the end of the 19th century it almost completely outnumbered the original light-coloured type (var. typica), with a record of 98% in 1895.[5] The evolutionary importance of the moth was only speculated upon during Darwin's lifetime. It was 14 years after Darwin's death, in 1896, that J.W. Tutt presented it as a case of natural selection.[6] Due to this, the idea widely spread, and more people believed in Darwin's theory.
Bernard Kettlewell was the first to investigate the evolutionary mechanism behind peppered moth adaptation, between 1953 and 1956. He found that a light-coloured body was an effective camouflage in a clean environment, such as in Dorset, while the dark colour was beneficial in a polluted environment like in Birmingham. This selective survival was due to birds which easily caught dark moths on clean trees, and white moths on trees darkened with soot. The story, supported by Kettlewell's experiment, became the canonical example of Darwinian evolution and evidence for natural selection used in standard textbooks.[7]
However, failure to replicate the experiment and criticism of Kettlewell's methods by Theodore David Sargent in the late 1960s led to general skepticism. When Judith Hooper's Of Moths and Men was published in 2002, Kettlewell's story was more sternly attacked, accused of fraud, and became widely disregarded. The criticism became a major argument for creationists. Michael Majerus was the principal defender. His seven-year experiment beginning in 2001, the most elaborate of its kind in population biology, the results of which were published posthumously in 2012, vindicated Kettlewell's work in great detail. This restored peppered moth evolution as "the most direct evidence", and "one of the clearest and most easily understood examples of Darwinian evolution in action".
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Rachal Corporation produces and sells a single product whose selling price is $150.00 per unit and whose variable expense is $57.00 per unit. The company's monthly fixed expense is $381,300.
Required:
a. Assume the company's monthly target profit is $9,300. Determine the unit sales to attain that target profit. Show your work!
b. Assume the company's monthly target profit is $18,600. Determine the dollar sales to attain that target profit. Show your work!
Answer:a) if the company's monthly target profit is $9,300, 4,200 units sales is needed
b) if the company's monthly target profit is $18,600, 4,300 units sales is needed
Explanation:
Using The Contribution Margin Approach:
Contribution Margin = Sales expense - variable expense
=$150.00 - $57.00
=$93
Contribution Margin Ratio= Contribution Margin/ sales expense x 100
=93/150 x 100
= 62%
Assume the company's monthly target profit is $9,300.
A) Sales to attain the target profit = [(Fixed expenses + Target profit) ÷ Contribution Margin ratio]
= ($381,300. + $9,300) ÷ 0.62
$390,600 ÷ 0.62
= $630,000
No. of units to be sold =Sales to attain the target profit/ selling price
$630,000/$150.00
=4,200 units
Assume the company's monthly target profit is $18,600
B) Sales to attain the target profit = [(Fixed expenses + Target profit) ÷ Contribution Margin ratio]
= ($381,300. + $18,600 )÷ 0.62
$399,900 ÷ 0.62
= $645,000
No. of units to be sold =Sales to attain the target profit/ selling price
$645,000/$150.00
=4,300 units
True or false ? A larger population density always indicates a larger population size
Answer:
Explanation:
false
Which of the following is NOT a statement from the cell theory?
O All cells come from pre-existing cells.
•All cells require water for survival.
•All living things are composed of cells.
•Cells are the basic unit of structure and function of living things.
Answer:
The unified cell theory states that: all living things are composed of one or more cells; the cell is the basic unit of life; and new cells arise from existing cells.
Therefore, B is the answer.
"All living cells require water for survival" is NOT a statement from the cell theory.
All cells require water for survival is not a statement from the cell theory.
What is cell theory?The cell theory is a fundamental principle in biology that states that all living organisms are composed of one or more cells and that the cell is the basic unit of life. The theory was first proposed by German scientists Matthias Schleiden and Theodor Schwann in 1839, and later refined by Rudolf Virchow in 1855. The three main principles of the cell theory are:
All living organisms are composed of one or more cells.The cell is the basic unit of life and structure for all living organisms.All cells come from pre-existing cells through the process of cell division.The cell theory is considered one of the most important and enduring concepts in biology, and it forms the foundation for understanding the structure and function of cells and the organization of life on Earth.
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During which period is the substance changing state?
A. During the time labeled C, when the temperature increases
sharply.
B. During the time labeled E, when the temperature increases for a
third time.
C. During the time labeled A, when the temperature first starts to
increase.
D. During the time labeled D, when the temperature stays the same.
SIDANT
Answer:
[tex]\boxed {\boxed {\sf D. \ During \ the \ time \ labeled \ D, \ when \ the \ temperature \ stays \ the \ same}}[/tex]
Explanation:
Phase changes have to happen at a specific temperature. During a phase change, the energy is used to make the change happen, instead of raising the temperature.
On a graph, a constant slope, or in this case temperature, is a flat line. On this graph, the flat lines are at B and D.
There is no answer including B, but there is for D.
Choice D: During the time labeled D, when the temperature stays the same is correct.
2. Which 2 organelles are found in BOTH plants and animals? *
Answer:
Structurally, plant and animal cells are very similar because they are both eukaryotic cells. They both contain membrane-bound organelles such as the nucleus, mitochondria, endoplasmic reticulum, golgi apparatus, lysosomes, and peroxisomes. Both also contain similar membranes, cytosol, and cytoskeletal elements.
Explanation:
Mary has type a blood marries father has type O blood Mary Mary’s bob who has type O blood what percent of their children would be expected to have type O blood
Why are animal gametes haploid?
a. Gametes have two copies of each chromosome
b. Gametes are developing embryos that develop into haploid adults
c. Gametes have one copy of each chromosome to create a haploid individual
d. Haploid egg and sperm cells combine to create a diploid individual
Answer:
d. Haploid egg and sperm cells combine to create a diploid individual
Explanation:
Animals are diploid organisms (2n) and undergo sexual reproduction. This sexual reproduction causes them to produce gametes via a process called MEIOSIS. Meiosis is a division that reduced the number of chromosomes in the daughter cell (gamete) by half.
This means that meiotic division produces haploid gametes (n) from a diploid animal. This happens so that when the haploid sperm cell (male gametes) and haploid egg cell (female gametes) meet in a process called FERTILIZATION, a diploid individual is created.
Answer:
D. Haploid egg and sperm cells combine to create a diploid individual
Explanation:
Is it possible to predict which plants may have more stomata per mm2 than the others? Why or why or not?
Answer:
no it isnt
Explanation:
Question 1: This diagram shows the process of translation. Which statement is correct?
A. The mRNA code determines which tRNA molecules are used
B. The molecule of tRNA is taking away amino acids one at a time.
C. The amino acid chain is held together by mRNA
D. The molecule of tRNA bonds with mRNA before it bonds to an amino acid.
Question 2: The diagram above represents a biochemical process that occurs in a cell. The purpose of this process is to synthesize_________?
A. Messenger RNA
B. Carbohydrates
C. Deoxyribonucleic Acids
D. Proteins
Question 3: Scientist continually work to better understand human diseases. Knowledge of the human genome enables them to better understand the proteins involved. How does analyzing human genomes help scientists in this endeavor?
A. Chromosomes join together to make proteins.
B. The bases that make up DNA are also present in RNA
C. DNA contains the information used to make proteins.
D. Nucleic acid molecules have shapes similar to those of proteins.
Question 4: Which component of the genetic code differs between DNA and RNA?
A. Three nucleotides per codon
B. The presence of adenine (A) in codons
C. The presence of uracil (U) in codons
D. The presence of amino acids in codons
Question 5: What mRNA sequence will best match the section of DNA shown below?
A. G – A – T – C – C – T
B. C – T – A – G – G – C
C. C – U – A – G – G – A
D. T – C – G – A – A – G
Answer:
i think its B C D C and A
Explanation:
Hope this helps
The mRNA code determines which tRNA molecules are used. The purpose of this process is to synthesize protein. DNA contains the information used to make proteins. The presence of uracil (U) in codons makes difference between DNA and RNA. The correct options are A, D, C, C, and C respectively.
What is nucleic acid?Natural chemical substances called nucleic acids are the main information-transporting molecules in organisms.
They are particularly crucial in controlling protein synthesis. Deoxyribonucleic acid (DNA) and ribonucleic acid are the two primary types of nucleic acids (RNA).
That tRNA molecules are utilized is determined by the mRNA code. The creation of protein is the aim of this procedure.
The instructions needed to create proteins are found in DNA. Codons that contain uracil (U) distinguish between DNA and RNA as RNA possesses uracil in plane of thymine in DNA.
In the sequence given in the second image, the sequence of the mRNA will be C – U – A – G – G – A.
Thus, the correct options are A, D, C, C, and C respectively.
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Your question seems incomplete, the missing images are:
Compare and contrast serine proteases and aspartic proteases. Not all answers will be used. Serine protease Both Aspartic protease
Answer: The main similarity between the serine protease and aspartic protease is that these enzymes catalyze the break down or hydrolysis of the peptide bonds.
Explanation:
Serine protease structure has a triad of histidine, serine, and aspartic acid that are joined with the hydrogen bonds. Aspartic protease has a structure which includes the two aspartic acid residues which attack the peptide bond.
Serine protease catalyzes the hydrolysis of the peptide bonds with the the help of two tetrahedral intermediates, whereas the aspartic protease abstracts the proton from water molecule it results in nucleophilic attack on the carbonyl atom of carbon resulting in breakage of peptide bond.
if a sample contains 20g of an isotope that has a half life of 1000 years how much will be left after 2000 years
After 2000 years, there will be 5g of the isotope remaining.
What is an isotope?If an isotope has a half-life of 1000 years, it means that after 1000 years, half of the original sample will have decayed. After another 1000 years (2000 years total), half of the remaining sample will have decayed, and so on.
To calculate how much of the sample will be left after 2000 years, we can use the following formula:
[tex]N = N_{0} * (1/2)^ (t/T)[/tex]
where:
N = the amount of the isotope remaining after time t
N0 = the initial amount of the isotope
t = the time that has elapsed
T = the half-life of the isotope
Plugging in the values from the problem, we get:
N = 20g * (1/2)^(2000/1000)
N = 20g * (1/2)^2
N = 20g * 1/4
N = 5g
Therefore, after 2000 years, there will be 5g of the isotope remaining.
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Please Help I'll give branliest!!!
Answer:
dtyhhcdgghjgderjlheryiouyiiifdvbcxse
If the frequency of the black allele %B allele for the moth coloration gene in the newly founded island population of moths in your genetic drift lab simulation was 78% what was the frequency of the white allele %b allele in the same population at the same time? A. 19.5% B. 22% C. 39% D. 78% or E. Impossible to determine
Answer:A
Explanation:
Under genetic drift effects, the allelic and genotypic frequencies of a population change through generations. In the exposed example, the frequency of the white allele in the same population at the same time is f(b) = 22%.
-------------------------
Available data:
Frequency of the dominant allele, B = 78% = 0.78 Frequency of the recessive allele, b = ??Genetic drift lab simulation ⇒ Founder effectWe need to find out the frequency of the recessive allele is this new population. But before answering the question, let us review what the genetic drift is.
Genetic drift is an evolutionary mechanism. Genetic drift is the random change that occurs in the allelic frequency of a population through generations. The magnitude of this change is inversely related to the size of the original population. Its effects are harder in a small-sized population. These changes produced by genetic drift accumulate in time. Eventually, some alleles get lost, while some others might set. Genetic drift affects a population and reduces its size dramatically due to a disaster or pressure -bottleneck effect- or because of a population split -founder effect-.When the small population increases in size, it will have a genetically different composition from the original one. Genetic variability is reduced, and there exists the possibility of developing a peculiar allelic composition.
According to this information, we know that allelic frequencies vary from generation to generation. So probably, if we need to calculate allelic and genotypic frequencies in the next generation, they will be different from the frequencies in this generation.
However, in this problem, we need to determine the frequency of the recessive allele at the same time, meaning in the present generation.
Since they are frequencies, their addition must equal one. So all we need to do is to clear the following equation,
p + q = 1
being
p the dominant allele frequency, f(B) = 0.78q the recessive allele frequency, f(b) = ??0.78 + q = 1
q = 1 - 0.78
q = 0.22 = 22%
The frequency of the white allele in the same population at the same time is f(b) = 22%.
---------------------------
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Which is the correct definition for an ecosystem?
Answer:
1.
A system formed by an ecological community and its environment that functions as a unit.
2.
The interconnectedness of organisms (plants, animals, microbes) with each other and their environment.
3.
business, marketing A set of interconnected products and services.
Answer:
Explanation:El ecosistema es el conjunto de especies de un área determinada que interactúan entre ellas y con su ambiente abiótico; mediante procesos como la depredación, el parasitismo, la competencia y la simbiosis, y con su ambiente al desintegrarse y volver a ser parte del ciclo de energía y de nutrientes
2. What does "gibbous" mean? •increasing in apparent size •decreasing in apparent size •larger than half, smaller than full •smaller than half larger than new •about half
Answer:
larger than half
increasing and decreasing in apparent size
Explanation:
Having the observable illuminated part greater than a semicircle and less than a circle. It always wax and wane
gibbous=3/4
Small cells have a higher _______ to volume ratio. That means for a given Small cells have a higher volume, there is a lot more cell membrane.
Ice wedging into the rock and breaking and crAcking the rock and soil
Answer:
Ice wedging is a process that happens when water gets into the cracks of concrete, stones, other forms of the Earth, and freezes. When the water freezes, it expands and pushes the rock from the crack which either separates and turns it into two rocks, or the rock might form together again and just be a larger rock. This process happens in Winter and usually finished in Spring when the ice between the rocks melt. I have described the process of ice wedging for you.
When sleeping overnight, a person doesn't eat for many hours and blood sugar decreases. How does negative feedback work to affect this physiological value in a healthy person?
A. Insulin is released to cause cells to release glucose into the bloodstream.
B. Glucagon is released to cause cells to absorb glucose from the bloodstream.
C. Glucagon is released to cause cells to release glucose into the bloodstream.
D. Insulin is released to cause cells to absorb glucose from the bloodstream.
Answer:
It is c
Explanation:
C is the answer ur looking for my guy
How do you know that vinegar was diffused into the cubes
1. Which of the following best explains how Earth’s atmosphere protects life on the planet?
It becomes less dense at higher altitudes.
It consists of different layers of different thicknesses.
It allows visible light to pass through completely.
It contains gases that filter out ultraviolet radiation.
2. Matthew has recently learned that Earth’s atmosphere is made up of nitrogen, oxygen, water vapor, and many other trace elements. Which of the following is NOT a way in which gases in the atmosphere are helpful to life on Earth?
Carbon dioxide insulates Earth
Protection against radiation from the Sun
Barrier against violent storms and lightning
Oxygen stays within the atmosphere
3. Which of the following is a way the atmosphere helps maintain life on Earth?
The atmosphere helps maintain a moderate temperature.
The atmosphere draws water vapor from outer space.
The atmosphere has air currents that rotate the planet.
The atmosphere contains some gases that are toxic.
keep her skin protected. She wonders what else the atmosphere does that she takes for granted each day. The atmosphere allows which of the following to happen?
Meteorites to hit Earth’s surface
Chloroplasts producing oxygen
Reflection from the ocean's surface
Precipitation and the water cycle
5. Gases in the atmosphere are helpful to life on Earth because they offer protection from which of the following?
Poisonous gases from stars
Harmful radiation from the Sun
Collisions with other planets
Violent storms and lightning
6. Without the atmosphere, life on Earth would not be possible. Which of the following is NOT an explanation for how Earth’s atmosphere protects life on the planet?
It allows visible light to pass through completely.
It contains gases that filter out ultraviolet radiation.
It keeps Earth warm by trapping in heat.
It protects life from ultraviolet rays of light.
7. Alexander applies sunscreen to help provide protection from ultraviolet radiation. With what does the atmosphere provide protection for Earth?
Thick layers of ice clouds
Ozone in the upper atmosphere
Water vapor in the lower atmosphere
The reflective surface of the ocean
8. The atmosphere is often referred to as a blanket that covers Earth, keeping out harmful things and protecting life inside. Which of the following best represents a way in which the atmosphere helps maintain life on Earth?
The atmosphere provides air for oxygen.
The atmosphere controls the distance from the Sun.
The atmosphere helps rotate the planet.
The atmosphere provides protection from disease.
9. Which two gases in the atmosphere are essential to life on Earth?
Nitrogen and helium
Carbon dioxide and oxygen
Neon and argon
Helium and hydrogen
10. The atmosphere is made up of four different layers: the thermosphere, mesosphere, stratosphere, and troposphere. Which of the following is NOT true regarding the composition and structure of the the atmosphere?
The structure maintains safety against harmful UV rays.
The composition allows necessary gases for life on Earth.
The atmosphere allows Earth to rotate around the Sun.
The atmosphere is made up of nitrogen, oxygen, and a variety of gases.
Answer:
i think 1. is d and 2. is c i hope it helps
Explanation:
Earth's atmosphere contains gases that filter out ultraviolet radiation. So, the correct options for 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10 are D, A, A, D, B, A, B, A, B and C respectively.
What is the atmosphere of the Earth?The layer of gases that covers the Earth is known as the atmosphere. It is made up of roughly 78% nitrogen, 21% oxygen, and 1% additional gases like argon, carbon dioxide, neon, and methane. It is held in place by the gravity of the Earth. The troposphere, stratosphere, mesosphere, and thermosphere are the four principal layers of the atmosphere.
Gases in the atmosphere of Earth serve as UV radiation filters. CO2 acts as an insulator. The existence of life on Earth is not a result of atmospheric gases. A temperate temperature is kept by the atmosphere. The water cycle and precipitation are made possible by the atmosphere. Life on Earth benefits from gases in the atmosphere because they provide protection from harmful solar radiation.
Earth is protected by ozone in the upper atmosphere. The best way to think about how the atmosphere supports life on Earth is as the source of oxygen in the air. The atmosphere's carbon dioxide and oxygen are necessary for life on Earth.
So, the correct options for 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10 are D, A, A, D, B, A, B, A, B and C respectively.
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Types of carbohydrates and one example of each
Explanation:
Examples of Carbohydrates
Dairy Products – Yogurt, Milk, Ice cream.
Fruits – Fruit juice or Whole fruit.
Grains – Cereal, Bread, Wheat, Rice.
Legumes – Plant-based proteins, Beans.
Starchy Vegetables – Corn, Potatoes.
( 10 points) (pls help brainliest)
What causes a blind spot in human vision?
A. The retina is located behind the lens.
B. Cones are ineffective in low light.
C. The cornea at the front of the eye is transparent.
D. The retina is interrupted by the optic nerve.
Answer:
The answer is option D. The retina is interrupted by the optic nerve.
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Answer:
d
Explanation:
The swallowing phase where the velopharynx closes forcefully and larynx completely closes at 3 levels is the...
a. Tongue preparatory phase
b. Pharyngeal transport phase
c. Oral transport phase
d. Laryngeal transport phase
Answer:
b. Pharyngeal transport phase
Explanation:
During the pharyngeal phase, the vocal folds close to keep food and liquids from entering the airway.
Swallowing the velopharynx closes forcefully and the larynx completely close at the level of the pharyngeal transport phase this action seal the airway passage, hence option b is correct.
What is swallowing ?According to where the bolus is located, the swallowing process is often split into oral, pharyngeal, and esophageal phases. When consuming solid food vs drinking liquid, the food moves differently through the oral cavity and into the oropharynx.
The tongue closes the oropharynx while it is in the pharyngeal phase. The proximal pharyngeal wall and soft palate serve as a barrier to the nasopharynx.
The laryngeal entrance is sealed off by the vocal cords and arytenoids, and the epiglottis swings down to cover the laryngeal vestibule. These acts close up the pharyngeal cavity's airway.
Therefore at 3 levels, the velopharynx closes forcefully and the larynx completely closes in the pharyngeal transport phase action to seal the airway passage, hence option b is correct.
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Bones are hard structures and cannot be bent but we still bend our elbow, knee etc. How is this possible?
Answer:
Bones are hard and cannot bend on their own. The joints help the body in moving. Muscles are like elastic bands which are attached to the bones by means of tough connecting bands called tendons. Muscles help in the movement of bone through pull/contraction.
Explanation:
HELP IM IN ZOON RN AND ILL GIVE YOU 56 POJNTS
Answer:
Multicellular
Explanation:
Unicellular, as the prefix "uni" implies, only have ONE cell. Unicellular organisms can include bacteria, yeast, protists, etc. Multicellular organisms have many cells and are any plant or animal, as they are much larger and complex than unicellular organisms.
As for the second question, the frilled lizard is a perfect example of the ways that organs work together to form necessary organ systems. In the instance of the heart, there are cardiac muscle cells that branch and connect to each other to form cardiac muscle tissue, which has special junctions that cause the cells to contract together and in turn keep the heart pumping and the circulatory system moving.
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If there are 10,000 kCal of energy available in the producers, how much energy would be available to each of following levels of consumers?
Explain what happens to the energy as it moves from producer to the tertiary consumer.
Answer:
Primary Consumer - 1000 kCal
Secondary Consumer - 100 kCal
Tertiary Consumer - 10kCal
Explanation:
Each time a consumer consumes the previous organism, the energy that is consumed is ten percent of the last one. This is called the ten percent rule.
