Answer:
volume of 2% saline (V₁) = 0.25ml
volume of water = 4.75ml
Explanation:
The requirement in the question is to obtain 0.1% of NaCl from 2% NaCl, and the process is dilution. The general dilution equation is guven by:
C₁V₁ = C₂V₂
where:
C₁ = initial concentration = 2%
V₁ = initial volume = ?
C₂ = final concentration = 0.1%
V₂ = final volume = 5ml
C₁V₁ = C₂V₂
calculating for V₁
∴ V₁ = (C₂V₂) ÷ C₁
= (0.1% × 5) ÷ 2%
V₁ = 0.25ml
Now, let us calculate the volume of water needed:
V₁ + Volume of water = V₂ (volume of 0.1% NaCl)
0.25 + volume of water = 5
volume of water = 5 - 0.25
volume of water = 4.75ml
what are two kinds of insomnia?
Answer:
Short-Term Insomnia and Chronic Insomnia.
Explanation:
Short-Term Insomnia is a brief episode of difficulty sleeping.
Chronic insomnia is a long-term pattern of difficulty sleeping.
Answer:
Short-Term Insomnia. Also known as acute insomnia or adjustment insomnia, this is a brief episode of difficulty sleeping. ...
Chronic Insomnia. Chronic insomnia is a long-term pattern of difficulty sleeping. ...
Other Ways of Describing Insomnia.
Explanation:
in the levels of organization of plants, what are the two tissues and their functions?
Which hypothesis is testable?
Plants that are grown by using brand A fertilizer taste best.
Plants that have flowers look prettier than plants that do not have flowers.
Plants will eventually die off if global warming trends continue.
Plants make more sugar on sunny days than on cloudy days.
Answer:
D.
Explanation:
Plants make more sugar on sunny days than on cloudy days.
Answer:Plants make more sugar on sunny days than on cloudy days.
Explanation:
d.
How much of the earth's oxygen does algae produce?
One Quarter
One third
One fifth
One half
Answer:
One Third
Explanation:
". Algae produces one third of all the oxygen produced by photosynthesis on Earth. "
Answer:
One third
Explanation:
Hope this helps :)
Question 4 of 20 :
Select the best answer for the question.
4. How do soils become overly saline?
O A. Salt from fertilizer accumulates in the soil
O B. Plains are flooded with seawater during large storms, which evaporates.
O C. Salts accumulate as water evaporates in poorly drained arid fields.
O D. As the climate warms, salts are deposited with acid rain.
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Answer:
C
Explanation:
When irrigation water containing significant salt content is used—without applying extra water to leach out the salts—accumulation of salts can create a saline soil.
Which object has particles with the most kinetic energy
MULTIPLE CHOICE QUESTION
What is Descent with Modification?
Similarities in offspring due to having same parents
Differences in offspring due to random genetic
mutations or the recombination of parent's DNA.
Differences in offspring due to learned traits.
A group of scientists have created a new drug X that helps with anxiety.What is your hypothesis?
Answer:
Explanation:
it will help calm people that have anxietycan be used as a placebo effectDescribe how Mendel's two laws are illustrated by the movement of chromosomes in meiosis. Drag the terms on the left to the appropriate blanks on the right to complete the sentences. Not all terms will be used.
a. metaphase I
b. anaphase I
c. in seperate gametes
d. meiosis II
e. in one gamete
f. law of Segregation
g. depend on
h. independent of
i. law of Independent Assortment
j. meiosis I
1. _____is illustrated by the behavior of two pairs of homologs during_____. The alignment of one homologous pair is_____the alignment of other pairs. 2. _____is illustrated in_____when homologs separate. Alternate alleles of a gene found on homologs segregate from each other and end up_____.
Answer:
1. law of Independent Assortment; metaphase I; independent of.
2. law of Segregation; meiosis I; in separate gametes.
Explanation:
Between 1856 and 1863, Gregor Mendel developed a series of mating experiments using pea plants, which enabled the discovery of some basic principles of inheritance. These principles/laws are stated as:
1) Law of segregation: this principle states that the inheritance pattern of phenotypic traits is characterized by the presence of a gene pair and each gamete carries only one allele for each gene pair so offspring inherit one gene variant (allele) from each parent
2) Law of independent assortment: this principle states that the genes responsible for the inheritance pattern of different traits are independently sorted from one another and thereby different traits are independent one from another.
3) Law of dominance: this principle states that the dominant allele will always be expressed in heterozygous individuals (this law is only applicable in cases of complete dominance).
Choose all the answers that apply.
Our bodies exhale carbon dioxide (CO2). Carbon dioxide
is a compound
has two atoms of oxygen
is made of oxygen and carbon
s an element
has two molecules of oxygen
Please hurry need help!!!!!
Answer:
CO2 is a compound, it has 2 atoms of oxygen, and is made up of oxygen and carbon
Explanation:
Answer:
CO2 is a compound, it has 2 atoms of oxygen, and is made up of oxygen and carbon
Explanation:
The study of the interactions between organisms and their interrelationships with the physical environment is known as
A team of scientists is studying several plant species that they think could become new farm crops. The scientists want to apply selective breeding to
develop one of the species into useful crop plants.
Which property of a plant species would be MOST USEFUL for meeting the scientists' goal?
A. very low genetic variation
B. very high genetic variation
C. producing only a few fruits and seeds each growing season
D. growing slowly from seedlings to maturity
What is interkinesis??
Answer:
Interkinesis or interphase II is a period of rest that cells of some species enter during meiosis between meiosis I and meiosis II. No DNA replication occurs during interkinesis; however, replication does occur during the interphase I stage of meiosis.
Explanation:
Hope it helps
Differences between ephyra of Aurelia and Medusa of Obelia
Answer:
The answer is below
Explanation:
There are differences between ephyra of Aurelia and Medusa of Obelia some of which are:
1. While aurelia developed from the metamorphism of ephyra, the medusa is developed by the budding of blastostyles
2. Similarly, despite the resemblance in body structure, the aurelia is considered jellyfish, while obelia is considered Jellyfish.
3. Also, the medusa period in aurelia is dominant, while that of Obelio is reduced
Which statement describes the general
pattern of winds near the equator?
A. Winds are generally weak because the
equator is a region of mostly low air
pressure.
B. Winds are generally strong because the
equator is a region of mostly high air
pressure.
C. Winds are generally weak because the
equator is a region where low and high air
pressure atmospheric bands come together.
D. Winds are generally strong because the
equator is a region where low and high air
pressure atmospheric bands come together.
Answer:
A
Explanation:
do i need to explain
In 1998 paleoanthropologist Rick Potts of the Smithsonian institution published an article in the yearbook of physical anthropology a peer reviewed Journal the article was titled environmental hypotheses of hominin evolution in his paper pots provided evidence to support his claim that gray variations and environmental conditions over time or responsible for the attacks ability of humans and the success of our species why might this not be the best article to reference?
Answer:
Because the author of the article did not do an experiment to draw his own conclusions and issue his own information, but he did a bibliographic review of the work of other authors to write his own article.
Explanation:
The article presented in the question above was done through a bibliography search and not through an experiment. This means that the author did not test the hypotheses through a scientific experiment, but formulated the conclusions of his article, based on the works of other authors, which makes this article not the best option to be considered as a reference article.
what is unequal reproductive success
Unequal reproductive success, also known as differential reproductive success, is a fundamental concept in the theory of evolution proposed by Charles Darwin.
It refers to the variation in the number of offspring produced by individuals within a population based on their inherited traits and adaptations.
Individuals possessing advantageous traits that better suit their environment are more likely to survive, reproduce, and pass on these favorable traits to their offspring.
On the other hand, individuals with less favorable traits may have lower reproductive success.
Over successive generations, the frequency of advantageous traits increases in the population, leading to the process of natural selection and the gradual evolution of species to better adapt to their changing environments.
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Question 20 of 20 :
Select the best answer for the question
20. Which of these statements about the Ogallala Aquifer is true?
O A. Its water usage is closely regulated,
O B. It's beneath the East Coast.
O C. It's running out of water.
D. It has enough water to last 6,000 years.
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Answer:
C!!
Explanation:
It's not B because it's located in the great plains. Not D because in 50 years, 70% of the aquifer will be gone. Not A because water use isn't regulated.
Ogallala Aquifer is the rock holding the groundwater in the Great Plains of America. The Ogallala Aquifer is running out of water. Thus, option C is correct.
What is Ogallala Aquifer?Ogallala Aquifer is an underground layer of water that is held by the rocks, pebbles, and gravel that make the water well above the surface. It is not beneath the East Coast but is situated on the Great Plains of the United States.
It has been reported that the water usage of the Ogallala Aquifer is not regulated and hence it does not have enough water to last up to 6,000 years. At approx 70%, the water of the aquifer will be soon gone resulting in the deprivation of the water.
Therefore, option C. the Ogallala Aquifer is running out of water is correct.
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A _______ error occurs when sister chromatids fail to separate properly during meiosis.
nondisjunction happens
Explanation:
The loss of a single chromosome from a diploid genome is called monosomy while the gain of one chromosome is called trisomy
The inside of a can has equal pressure to the outside of the can. If the pressure inside the can decreases and the
pressure outside the can increases, will the can explode, implode, or stay the same? Write your answer then draw
the final state of the can.
If the results of your experiment do not support your hypothesis, you should
a. Publish your results anyway
b. Consider the results abnormal and continue working
c. Find a way to rationalize your results
d. Try another metho
is scorpion are vertebrate or invertebrate
Answer:
invertebrates
Explanation:
hope this helped:))))))))))))))
What does dna code for
Answer:
deoxyribonucleic acid.
Explanation:
DNA
Answer:
DNA is an abbreviation of deoxyribonucleic acid
Explanation:
DNA is a blend of Deoxyribose and Nucleic Acid.
I hope this helps.
What is meant by the term "density"? Please provide an example of how
density is determined in air masses.
Answer:
1) density "the degree of compactness of a substance."
2) air masses "More dense, or “heavier” air will slow down objects moving through it more because the object has to, in effect, shove aside more or heavier molecules. Such air resistance is called “drag,” which increases with air density."
Explanation:
BRAINLIEST? plz
How do you think Homeostasis of an organism and cell transport are connected?
Answer:
no they are not connected
Answer:
Cell transport helps maintain homeostasis because it keeps the conditions in the typical ranges within all of the cells in the organism.
Explanation:
If we have a DNA gene that reads: TACGCGTCAGGCCAA
The Transcribed mRNA would read?
Answer:
AUGCGCAGUCCGGUU
Explanation:
A - U
T - A
G - C
C - G
i)Which one of the following substances have sour test.a) acid b)base c) salt d) all of these
Answer:
a) acid
Explanation:
Acid is a chemical substance that is capable of donating protons (H+) when in an aqueous solution. This property makes a substance an acid, although the ability to donate completely or partially distinguishes a strong and weak acid.
One of the characteristics of acids is their SOUR TASTE. This characteristic sour taste is attributed to the hydrogen concentrations present in acidic foods or substances e.g unripe fruits.
In poultry, two genes R and P, control the shape of the comb on the head. The following genotype/phenotype relationship applies to the two genes and the phenotype: R- P- animals have a 'walnut' comb, R- pp animals have a 'rose' comb, rr P- animals have a 'pea' comb, and rr pp animals have a 'single' comb. What will the comb phenotypes be for the progeny of the cross RR Pp x rr Pp
Answer:
sssssssssssszdawe
Explanation:
______ receptors detect changes in internal and external body conditions.
Sensory
Motor
Answer: Sensory Receptors
Question: Do you think School is necessary during a worldwide pandemic because it’s stressing kids mental health and focus. If so explain why it’s still necessary