Answer:
Working on the project together on Saturday, the group members met
Answer:
The answer is B.
Explanation:
A tube with a membrane covering the bottom is placed in a beaker. The membrane allows water to flow through but not salt or glucose. The tube contains an aqueous solution with 4% salt and 20% glucose and the beaker contains an aqueous solution with 12% salt and 6% glucose. How could you describe the solution in the beaker compared to the solution in the tube
Answer:
The solution in the tube is hypertonic to the solution in the beaker.
Explanation:
To compare the solutions, find the total amount of solutes in both the tube and beaker.
The tube has 4% salt and 20% glucose, so it has 24% solute.
The beaker has 12% salt and 6% glucose, so it has 18% solute.
Since 24 is larger than 18, this means the tube has more solute.
Since the tube has more solute and less water compared to the beaker, it is hypertonic to the beaker.
So, the answer is that the solution in the tube is hypertonic to the solution in the beaker.
Solutions are hypertonic or hypotonic to other solutions according to their solute concentration grade. In the exposed example, the beaker aqueous solution is hypotonic to the tube solution, meaning it is less concentrated.
--------------------
Available data:
The membrane allows water to flow through but not salt or glucoseThe tube contains an aqueous solution with 4% salt and 20% glucoseThe beaker contains an aqueous solution with 12% salt and 6% glucoseWe need to describe and compare solutions.
To do it, first, we will review some theoretical framework.
When talking about solutions in compartison with the cell content, we can classify them as follows,
• HYPERTONIC ⇒ A hypertonic solution has a higher concentration of solute than the cell. This means that in the cell interior, the solute concentration is lower than in the solution itself.
• ISOTONIC ⇒ The solute concentration is the same inside the cell and outside.
• HYPOTONIC ⇒ A hypotonic solution has a lower concentration of solute than the cell. This means that in the cell interior, the solute concentration is higher than in the solution itself.
When a cell is in a hypotonic solution, through osmosis, water moves toward the cell.
Osmosis is the phenomenon that occurs when two dilutions of different concentrations -in this example, the interior of the tube and the beaker- are separated by a semipermeable membrane.
The membrane allows the pass of water but not solute. Hence, water can move from the most diluted side to the less diluted one.
What we need to consider is
• When a cell with semipermeable membrane is placed in a hypotonic solution, water enters the cell.
• When a cell with semipermeable membrane is placed in an isotonic solution, there is no water movement.
• When a cell with semipermeable membrane is placed in a hypertonic solution, water gets out of the cell.
In simple words, in the proposed experiment, glucose and salt -solutes- can not cross the membrane, but water can. The tube represents a cell. So,
The tube has 4% salt and the beaker 12 % saltThe tube has 20% glucose and the beaker 6% glucose.To make the analysis easier, we can add the concentration percentages of glucose and salt at each side of the membrane, and then compare them.
The tube contains an aqueous solution with 24% solute (4% salt + 20% glucose)The beacker contains an aqueous solution with 18% solute (12% salt + 6% glucose)We can see that the concentration of solute is higher in the interior of the tube than in the beaker. This difference suggests that water will move forward to the tube interior.
According to this analysis, we can say that
The tube aqueous solution is hypertonic to the beaker solution → More concentratedThe beaker aqueous solution is hypotonic to the tube solution → Less concentrated---------------------------------------------
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What is a photosynthetic pigment
A. A man-made compound that reacts to light
B. An oxygen based compound that captures light energy.
C. A light sensitive compound that changes color.
D. A colored compound that captures light energy.
Answer:
Answer D is correct.
Explanation:
A colored compound that captures light energy.
This photosynthetic pigment means the pigment which is present in chloroplasts to absorb or capture the light energy to do photosynthesis.
Hope this helps you
Which is the difference between an antibiotic and an antiviral?
Answer:
There are no options in this question, the options are as follows:
A. Antibiotics build up immunity, and antivirals increase white blood cells.
B. Antibiotics treat the symptoms, and antivirals destroy the causing organism.
C. Antibiotics are in liquid form, and antivirals are in mist form.
D. Antibiotics treat patients who have Staphylococcus, and antivirals treat patients who have the flu.
The answer is D
Explanation:
Specific drugs are used to curb infection or diseases caused by specific pathogens. An infection can be caused by either bacteria, virus or fungi. Considering their different mechanism of infection, viral infections are treated with the use of ANTIVIRAL DRUGS while bacterial infections are treated with the use of ANTIBIOTICS.
According to this question, staphylococcus is a bacterial genus and hence, patients with staphylococcus can be treated with antibiotics while flu is a viral disease, hence can only be treated with antivirals.
Answer:
A. Antibiotics build up immunity, and antivirals increase white blood cells.
Explanation:
edg
Which of the following BEST completes the analogy?
Answer:
there is nothing under the question.
Explanation:
Answer:
What are the options . comment
An ecologist studied the same species of deer during the summer and the winter. She noticed that during the summer, when there was plenty of food, the deer were energetic and playful. However, during winter when food was scarce, the deer moved more slowly and did not run unless they needed to escape a predator.
Which scientific fact is best supported by her observations?
A.
Some deer species will eat the bark of trees.
B.
Food is the fuel that gives animals energy.
C.
Food provides building materials that animals use to grow.
D.
Carnivores eat primarily the meat of other animals.
What sources must health care workers use when deciding which abbreviations and symbols to use on the job?
a. Those listed in their textbooks
b. Those approved by the facility in which they work
c. Those listed in medical dictionaries and reference books,
d. Those provided by their professional organization.
The sticky mass in some chemicals on heating was known as _______________________ fibre or fibre _________.
Answer:
Americans chemical society
What is nitrogen fixation?List all the ways in which nitrogen fixation takes place in nature.
Answer:
Hey mate.....
Explanation:
This is ur answer.....
Some forms of bacteria can convert atmospheric nitrogen into usable forms such as nitrates and nitrites. Such nitrogen fixing bacteria are commonly found in the roots of leguminous plants. These usable forms of nitrogen are absorbed by plants to produce many compounds such as amino acids, which in turn form proteins.
Hope it helps!
Brainliest plss!
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IN YOUR OWN WORDS, what is the definition for Zygote?
Answer:
Zygote, fertilized egg cell that results from the union of a female gamete (egg, or ovum) with a male gamete (sperm). In the embryonic development of humans and other animals, the zygote stage is brief and is followed by cleavage, when the single cell becomes subdivided into smaller cells.
A scientist observes rock masses that have moved past each other in opposite horizontal directions. Which feature does the scientist observe?
plateau
syncline
strike-slip fault
fault-block mountai
Answer:
Strike slip fault
Explanation:
when it masses moved away against horizontal directions.
Which of the following is an example of a
homologous trait?
A. the wings of bees and birds
B. the forearm of different animals
C. the DNA of land animals
Answer:
the wings on bees and birds
An example of a homologous trait is the wings of bees and birds. The correct option is A.
What are homologous traits?The Theory of Evolution can be used to explain the homologous features of related species. According to this hypothesis, species develop over time from a common progenitor.
In order to adapt to the new environment, species separated from one another and developed new features. The variety of species observed on Earth today is the result of a process known as speciation.
The homologous features that are shared by related species are proof of their shared ancestry. For instance, despite being different, the wings of a bat and a bird share characteristics.
Therefore, the correct option is A. the wings of bees and birds.
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Write down the functions of
1.microtubules
2.tripletsof microtubules
Answer:
Microtubules are filamentous intracellular structures that are responsible for various kinds of movements in all eukaryotic cells. Microtubules are involved in nucleic and cell division, organization of intracellular structure, and intracellular transport, as well as ciliary and flagellar motility
Centrioles are cylindrical structures that are made up of protein tubes called microtubules. Specifically, nine groups of three microtubules, known as triplet microtubules, are linked together to make the walls of the cylinder.
Hope it helps :)
Answer:
Microtubules have several functions. For example, they provide the rigid, organized components of the cytoskeleton that give shape to many cells, and they are major components of cilia and flagella (cellular locomotory projections). They participate in the formation of the spindle during cell division (mitosis).
triplet microtubules are linked together to make the walls of the cylinder.
Explanation:
The diagram below shows a light ray striking Medium A and Medium B at the same angle. (4 points)
A rectangle labeled Medium A is drawn on the left. A ray of light travels through air and strikes the surface of medium A making an angle of 50 degrees with the vertical. The light ray bends towards the vertical as it travels through Medium A and makes an angle of about 15 degrees with the vertical. A rectangle labeled Medium B is drawn on the right. A ray of light travels through air and strikes the surface of medium B making an angle of 50 degrees with the vertical. The light ray bends towards the vertical as it travels through Medium B and makes an angle of about 25 degrees with the vertical.
Which statement is correct?
The speed of the light ray is the same in air and Medium A.
The speed of the light ray is the same in air and Medium B.
Medium A and Medium B have different densities because light refracts at different angles.
Medium A and Medium B have the same density because the light ray strikes both at the same angle.
Answer:
A the speed of the light ray is the same in air and medium
. Most of the matter in the universe: A. Exists within stars B. Is made when planets are formed C. Is unknown, called dark matter and energy D. Is blue-shifted
Answer:
B
Explanation:
is made when planet are formed
Are there possible risks/harms that the genetic engineering process can cause to the public? How could this be prevented/minimized? How would humans benefit from this process?
Answer:
Harms: May cause nasty diseases and all sorts of bad things if not engineered properly.
We would benefit by basically being where we are now. We used a lot of genetic engineering to get our technology to the point it is now.
Explanation: Kind of hard to turn back from genetic engineering as it is a potentially useful process.
. Q.. List any two advantages associated with water stored in the ground.
Answer:
It does not evaporate.
It recharges wells near the area.
It provides moisture to the vegetation.
It does not provide breeding grounds for mosquitos , like stagnant water in lakes and ponds.
It is relatively protected from contamination by animal and human waste.
Explanation:
make a molecule between 87Fr^+ and 6C^-4
Answer:
gdshmsdh b
hhfdycjmncd
Explanation:
csbnmbvdfhdfg
why is rna a polymer and a macromolecule
Answer:
RNA is a polymer because it is made up of many monomers called nucleotides. Moreover, RNAs can form macromolecules because many RNAs are large molecules (i.e., polynucleotide chains).
Explanation:
Ribonucleic acid (RNA) can be defined as a single-stranded nucleic acid polymer of the four nucleotides. In RNA, each nucleotide is composed of a 1-ribose sugar, a 2-phosphate group and 3-one of four types of nitrogenous bases: Adenine (A), Cytosine (C), Guanine (G), and Uracil (U), which are covalently bonded to form polynucleotide chains. There are different types of RNAs such as mRNA, tRNA, rRNA, miRNA, circ-RNAs, lncRNAs, etc. Many of these RNAs form large single-stranded (ss) molecules, i.e., polynucleotide chains. For example, an mRNA sequence may have a length of 5,000 nucleotides (5 kb) or even more, and there are RNA viruses that have more than 20000 nucleotides (20 kb) in length.
How does random mating keep a
population in Hardy-Weinberg
Equilibrium?
A. Choosing a random mate creates variation which helps
the population evolve.
B. Individuals choose their mates causing only certain
traits to be passed on.
C. Mates aren't chosen based on traits so all alleles are
equally likely to be passed on.
D. When all the females of a population randomly choose a
mate and only certain alleles get passed on.
Answer:
A
explanation:
Question 7 of 10
A cell membrane is very specific about what it allows across. How does this
help the cell?
O A. Transport proteins allow only enzymes to pass through the
membrane.
O B. It is better for the cell if most molecules are prevented from
entering.
O C. The cell works better when it contains fewer proteins.
D. It helps the cell absorb as many different molecules as possible.
Answer:
The answer is D
Explanation:
As the cell is mostly dependant on ingested materials so this will help the cell to grow and perform other important activities in the cell
Can someone please help me!
The Pasteur effect shows that yeast consume glucose at a higher rate under anaerobic conditions than under aerobic conditions. Which of the following statements correctly explains this observation?
A. Less ATP is made under anaerobic conditions, so more glucose must be consumed to produce an equivalent amount of ATP.
B. Yeast are photosynthetic, so they are able to produce their own oxygen.
C. This observation is incorrect.
D. Aerobic conditions mean that cells make more ATP and use more glucose.
E. Yeast are obligate anaerobes, so aerobic conditions will kill yeasts.
These penguins are all members of the species Aptenodytes patagonicus.
Answer:
Organisms of the same species can live in different areas, while organisms of the same population live in only one area.
Explanation:
Answer:
Option D
Explanation:
Populations are all in one area
If your body lacks enzymes that break down carbohydrates, it would be unable to get __A__ for energy production. If you lacked the enzyme to digest proteins, you may not absorb enough __B__.
Answer:
Glucose and amino acid.
Explanation:
If your body lacks enzymes that break down carbohydrates, it would be unable to get glucose for energy production while on the other hand, if you lacked the enzyme to digest proteins, you may not absorb enough amino acid that our body needs for the formation of muscles. Enzymes play a great role in the breakdown of macro food particles into simpler molecules so that it can be absorbed by the cells.
Answer:
A: Sugar Molecules
B: Amino Acids
Hope this helps!
Explanation:
Can someone please help me!
Answer:
thats the 2 number point okay,plasma contains platelets ,ok
Which of the following statements is MOST accurate?
a. Most people who engage in gambling activities become addicted to it
and end up taking bankruptcy because they cannot pay their bills.
b. People at lower income levels lower use a larger percentage of their
income to buy lottery and scratch tickets than people at higher levels of
income.
c. Gambling is a moral issue, with little or no economic or financial impact
on individuals or society.
d. Casinos only have a positive impact on communities because they create
jobs and generate wealth.
Answer:
C
Explanation:
if the velocity of a vehicle starting from rest reaches 5m/2s in 2seconds, is the velocity of the vehicle uniform ?explain.
Explanation:
Avg speed × total times = total distance
20×25=500
Since acceleration in the 1st interval is same as deceleration in the 3rd interval and deceleration is from the same velocity achieved after acceleration, t
1
=t
3
s
1
=
2
1
×5t
1
2
s
2
=(5t
1
)t
2
s
3
=(5t
1
)×t
3
−
2
1
×5×t
1
2
=(5t
1
)×t
1
−
2
1
×5×t
1
2
s
1
+s
2
+s
3
=5t
1
t
2
+5t
1
2
⇒5t
1
2
+5t
1
t
2
=500−−−−1
2t
1
+t
2
=25−−−−2
Solving (1 ) and (2) ⇒t
1
=5,t
2
=15sec
Help me please picture included
Answer:
umm I'm sorry but the picture is not coming like I mn its blank
Which of the following statements about the Green Revolution is true?
A. The Green Revolution increased the biodiversity of crops grown around the world.
B. The Green Revolution bettered the environment by encouraging less fertilizer and
pesticide use.
C. The Green Revolution allowed countries that previously imported crops to become
crop exporters.
D. The Green Revolution was applied in the Americas but didn't have a global
impact.
The Green Revolution allowed countries that previously imported crops to become
crop exporters.
What is the Green Revolution?The Green revolution refers to the period of cultivation of high-yielding crops varieties especially grains by farmers beginning in the period of the 1940s to l960s.
The Green revolution resulted in increased food production among countries that usually imported food, so they became exporters.
Therefore, the Green Revolution allowed countries that previously imported crops to become
crop exporters.
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What is the best definition for the term 'peer review?'
o
A. When you are given of review of how well you work by your coworkers.
B. When research is scrutinized and re-tested by others who are experts in the same area.
C. When people of the same age read each other's work.
D. When research is published to the general public for them to form opinions on it.
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