Answer:
At the end of DNA replication, each copy is identical to each other (option A).
Explanation:
The concept of DNA replication implies that, from an original molecule, two identical molecules are obtained.
DNA replication is based on a semi-conservative model, since the double strand is separated, and each strand serves as a mold for the synthesis of a new strand. At the end of the replication, two identical DNA molecules will be obtained, each consisting of an original strand and a new one.
The best evidence that the replication process results in two identical molecules is that, otherwise, an individual's genetic information could vary, which does not happen.
The other options are not correct because:
B. The copies cannot be different.
C and D. They are 100% identical, not partially (50 or 90%) similar.
Which statement about the cell membrane is true?
It contains cellulose and sugars that are involved in communication.
It is present in animal cells only.
It is rigid and elastic for supporting the cell’s shape.
It prevents harmful substances from entering a cell.
Answer:
D
Explanation:
Why can't the air just rise and go up?
it's sinking
it's spinning
Air does rise and go up. For example, hot air rises because when you heat air (or any other gas for that matter), it expands. When the air expands, it becomes less dense than the air around it. The less dense hot air then floats in the more dense cold air much like wood floats on water because wood is less dense than water. keep this in consideration though, as the hot air cools and sinks back to the surface of the earth, there it gets warmed by the ocean only to rise again. This is called a convection current. In conclusion, air does indeed rise and go up.
What kind of human cells contain the most ribosomes?
Answer:
A mammalian cell contains more than 10 million ribosomes.
Answer-
Mammalian
Reason-
Mammalian cell can contain about 10 million ribosomes.
Place the Levels of organization in hierachical order from smallest to largest
1. Cells
2. Tissues
3. Organs
4. Atoms
5. Molecules
6. Organisms
7 Organelles
Answer:
The major levels of organization in the body, from the simplest to the most complex are: atoms, molecules, organelles, cells, tissues, organs, organ systems, and the human organism.
Explanation:
Hope this helps you!!!
Which statement best describes a dormant plant? *
1.It is in need of food,
2.It is hardy
3.It is inactive
4.It is fast growing
1. In Model 1 a pathogen (virus, bacteria, foreign protein, parasite) has entered the bloodstream ofan individual. Describe the symbol that represents the pathogen.
And if possible answer #3, I will mark brainiest
Complete question:
1. In Model 1 a pathogen (virus, bacteria, foreign protein, parasite) has entered the bloodstream of an individual. Describe the symbol that represents the pathogen.
3. Another type of white blood cell that is involved in the cell-mediated response is a helper T-cell.
a. Draw the symbol that represents the helper T-cell in Model 1.
b. In your drawing above, circle the specialized surface proteins on the helper T-cell.
Answer:
1. The pathogen is the one with the "star-like" symbol
3. a) The helper T-cell is represented like a Circle with the Th wrote inside.
b) The surface protein on the Th cell is the symbol that looks like this ⊥
or T Th cells.
Note: All the symbols are shown in the attached file.
Explanation:
Pathogens: These are invading the bloodstream, so you can see them among the white cells, and too many of them. Macrophages are one of the different types of white globules involved in the organism's defense against strange substances and pathogen agents. These cells are the principal actors in the immune response. Macrophages are the principal phagocytes of tissues, capable of recognizing different strange molecules that penetrate the organism, such as bacterias, parasites, and viruses. Macrophages phagocyte these substances and eliminate them, a process known as phagocytosis. Macrophages also have the capability of inducing an adaptative immune response. Macrophages show the antigens on their surfaces where they are recognized by lymphocytes.Helper T-cell: T-Lymphocytes are in charge of the regulation of the immune system. T-cells are the helper cells that coordinate the initial response in front of the pathogen. There are three types of helper T-cells: TH1 (lymphocyte T helper), TH2, and TH17. TH1 cells are highly effective during the elimination of intracellular pathogens.How does being close to the ocean keeps the cities near it cool?
Answer:
I guess the ocean breeze
How would you expect the spread of an airborne disease to be similar to and different from the spread of a foodborne disease and a person-to-person disease
Answer:
The airborne disease is only similar in the way that you must come in contact with infected air. There is no physical contact needed.
Explanation:
Answer: A. person to person
Explanation:
The graph shows that the disease spreads slowly at first, then rapidly, and slowly at the end. This pattern of transmission is most characteristic of a disease spread from one person to the next. When only one person has the disease, the rate of transmission is slow because that person may only meet a few others. But as the number of people with the disease increases, the number of meetings that spread the disease also increase. At this time, the disease can spread very rapidly. The disease spreads more slowly again when there are only a few people remaining that do not have the disease. With foodborne and airborne diseases, the rate of disease spread is most rapid when the disease first arises and the greatest number of possible victims are available. Graphs of foodborne and airborne transmission show the greatest rate of disease spread at the start of the outbreak.
FYI: This isn't my explanation this is the explanation the question gives! :) YW
Help ASAP
Using a microscope a student observes small circular cells that have a cell wall but no nucleus have based on their observations how would the student classify the cells A bacteria B protist C plant D animal
Bacterial DNA is located in the cytoplasm of the bacterial cell.
Answer: Yes, you are right.
Can producers function without sunlight? Why or why not?
Answer:
No because the producers function is to produce food for itself and other organisms through photosynthesis. Without sunlight, photosynthesis is impossible. Dont know why it is bold srry.
9. In one or two sentences, describe how the available energy may affect the population sizes of organisms at different
trophic levels
Answer:
Explanation:
In food web energy are been transfered from the producer which are often plants down to the last individual on the web.
Each individual takes in and expels the remaining to the next until it is distributed to all. The amount of energy received from the producer will determine the amount of energy that will be available for others to share, when enough energy is transferred they all have enough to share but when the energy level is low the individual on the web also receive a low energy this may affect the population leading to a reduction,
It can also lead to competition among the organisms,migration out of environment to search for food. But When the energy level is high or on the increase it leads to growth and development among the organism.
The three components of RNA are a phosphate group, ribose sugar, and a nitrogenous base
How are the base pairs different?
Answer:
The nitrogenous bases Adenine (A), pairs with uracil (U), while guanine (G) and cytosine (C) pair up.
Explanation:
Nucleotides are monomers that make up DNA and RNA- these are nucleic acids that function as storage, transport and messenger molecules for encoding proteins. Nucleotides contain a 5-carbon deoxyribose (with hydroxyl modifications) or ribose sugar (RNA), phosphate and one of four nitrogenous bases:
Adenine (A)
Guanine (G)
Cytosine (C)
Thymine (T).- DNA only
Uracil (U) found in RNA
Nucleotide monomers derive their names from their bases. Nucleic acid polymers form on a single strand through covalent bonding. This occurs between two nucleotides in an esterification reaction where a phosphodiester bond is formed.
Nitrogenous bases encourage hydrogen bonding, and resulting base pair formation. Adenine (A), pairs with uracil (U), while guanine (G) and cytosine (C) pair up.
HELPPP PLEASE ASAP!!!!!! Which of the following best describes positive feedback?
A) It causes an effector to signal the control center, which creates the stimulus to make a response.
B) It amplifies a change in a given condition by signaling for a response that increases that change.
C) It produces a response by increasing the set point in the organism’s metabolism.
D) It promotes decreases, rather than increases, in an organism’s metabolism.
Answer:
I think it was b
Explanation:
why do i think this because i have seen it everywhere im about to take the test and i will commet before someone else gets it wrong too.
HELP!What are the roles of and what happens to chromosomes, centrioles, centromeres, spindle fibers, nucleus and cell membrane during mitosis.
Answer:
Perhaps the most amazing thing about mitosis is its precision, a feature that has intrigued biologists since Walther Flemming first described chromosomes in the late 1800s (Paweletz, 2001). Although Flemming was able to correctly deduce the sequence of events in mitosis, this sequence could not be experimentally verified for several decades, until advances in light microscopy made it possible to observe chromosome movements in living cells. Researchers now know that mitosis is a highly regulated process involving hundreds of different cellular proteins. The dynamic nature of mitosis is best appreciated when this process is viewed in living cells.
Explanation:
Explain why the chemical equation for photosynthesis is a simplified representation of the process. How is the equation accurate? How is it inaccurate?
Answer:
The equation shows the general reactants and products of the process. However, it does not show intermediate steps. For example, carbon dioxide and water do not actually react with each other.
Explanation:
The equation is representing the general reactants and products of the process. But, it does not express the intermediate steps. For example, carbon dioxide and water do not actually react with each other.
What is photosynthesis reaction?The procedures by which chlorophyll bearing organisms and certain other microbes transforms sunlight to chemical energy is renowned as photosynthesis.
Light energy is grasped and utilized by green plants in the process of photosynthesis to efficiently convert, carbon dioxide, and minerals into oxygen and energy-rich organic compounds.
Plants grab these carbon dioxide as well as water from either the environment or soil during photosynthesis.
Water is oxidized within the plant cell, which means it loses electrons, whereas carbon dioxide is reduced, which means it gains electrons. This converts water to oxygen and carbon dioxide to glucose.
The equation represents the process's broad sense reactants and products. It does not, however, convey the intermediate steps. Carbon dioxide and water, for example, don't really actually react with each other.
Thus, that's why the equation is perhaps not accurate.
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Your question seems incomplete, the complete question perhaps is:
"Explain why the chemical equation for photosynthesis (below) is a highly simplified representation of the process. How is the equation accurate? How is it inaccurate?
6CO2 + 6H2O-----> C6H12O6 + 6O2
If enzymes are made up of proteins, then can proteins be considered as monomers to enzymes?
Answer:
no
Explanation:
just no............
16. What explanation can be used to describe the test tube shown?
5 points
A. Water is polar and oil is polar therefore the substances will not mix.
B. Water is nonpolar and oil is nonpolar therefore the substances won't mix.
C. Water is nonpolar and oil is polar therefore the substances will not mix.
D. Water is polar and oil is nonpolar therefore the substances will not mix.
Answer:
Water is polar and oil is nonpolar so the substances won't mix.
Explanation:
Water is polar covalently bonded within the molecule. This unequal sharing of the electrons results in a slightly positive and a slightly negative side of the molecule. oils are nonpolar, so they will remain separate from molecules of a polar solvent such as water.
What would happen to an organism if mitosis did not occur? Check all that apply.
The organism would not be affected.
The organism would not grow.
If an organism were cut or burned, the damaged area would not heal.
The organism would not produce new cells.
Answer:
The organism would not grow.
If an organism were cut or burned, the damaged area would not heal.
The organism would not produce new cells.
Explanation:
Answer:
B-The organism would not grow.
C-If an organism were cut or burned, the damaged area would not heal.
D-The organism would not produce new cells.
Explanation:
i just did it
What apparatus did Priestly use to reach
his conclusions?
A. triple beam balance
B. bell jar
C. microscope
Please help, 10 points
Answer:
The answer is B. Bell Jar
What is the effect of paraquat on ATP, NADPH,
and sugar?
Answer:
ATP will increase
NADPH will decrease
Sugar will decrease
Explanation:
Trust, and I just got this answer
The effect of paraquat on ATP, NADPH, and sugar includes the fact that ATP will increase, NADPH will decrease, and sugar will reduce.
Paraquat is also referred to as methyl viologen. It's a toxic chemical which is used as an herbicide for grass and weed control.
Paraquat can cause damage to one's health when it comes into contact with one's mouth or intestines.
It should be noted that biochemical changes that are caused by paraquat in the lungs will lead to rapid and prolonged oxidation of the NADPH. This then leads to the reduction in NADPH as it attempts to detoxify the lipid hydroperoxides. Also, paraquat will lead to an increase in ATP and a reduction in sugar levels too.
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Thermoses work because they minimize which kinds of heat transfer?
A.Conduction and convection
B. Conduction and radiation
С. Convection and radlation
D. Conduction, convection, and radiation
Answer:
B or C
Explanation:
I read about this awhile ago just forgot if it was ethier conduction or convection
The thermal heat energy transfers through various modes. Thermoses work because they minimize conduction and radiation transfer of heat. Thus, option B is correct.
What is heat transfer?Heat transfer has been the process that moves the heat from higher temperature towards the area of lower temperature. Conduction, convection, and radiations are the three modes of heat energy transfer.
In conduction, the heat flows from one body to another when they are in contact, and in radiation the heat flows in the waveform that does not need any direct contact. It needs an indirect medium to transfer the heat from high to lower temperatures. Thermoses do not show convection as it keeps the temperature constant.
Therefore, option B. thermoses use conduction and radiation.
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What would be the calculated population density for a frog population if there were 100 frogs living in a
pond that covers four square kilometers?
A) 100 frogs per square kilometer
B) 50 frogs per square kilometer
C) 40 frogs per square kilometer
D) 25 frogs per square kilometer
Which is the proper order of structures that contact the substances removed from the blood?
nephron → urethra → bladder → ureter
urethra → ureter → bladder → nephron
nephron → ureter → bladder → urethra
urethra → bladder → ureter → nephron
Answer:
nephron → ureter → bladder → urethra
Answer:
nephron → ureter → bladder → urethra
Explanation:
The nephron, a functioning unit of the kidney, filters blood and is where urine is produced. Once there is urine, it empties into the ureter, a tube from the kidney to the bladder. The urine is then temporarily stored in the bladder until the body is ready to excrete the urine through another tube called the urethra.
An organism has a haploid number of 36. What is the organism's diploid
number?
The muscular system aids in movement but also has three types of muscles. Which muscle below is Not part of the muscular system?
Answer:
what are the awnsers below?
Explanation:
please help me I will mark brainliest
A human cell has 46 total or 23 pairs of chromosomes. Following mitosis, the daughter cells would each have a total of ______ chromosomes. After meiosis I, the two daughter cells would have _____chromosomes, and after meiosis II ______ chromosomes.
Select one:
a. 23, 23, 23
b. 46, 23, 23
c. 46, 12, 12
d. 46, 46, 46
Answer: B is the answer
Following mitosis, the daughter cells would each have a total of 46
chromosomes.
After meiosis I, the two daughter cells would have 23 chromosomes, and
after meiosis II it will still remain as 23 chromosomes.
Mitosis is a type of cell division that involves the production of identical
daughter cells. The daughter cells usually contain 46 chromosomes with all
the parent traits present.
Meiosis is a type of cell division which produces sex cells and for
reproduction. It involves generating unique daughter cells which is gotten by halving the 46 chromosomes to become 23 chromosomes.
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Explain why plants grown in green light will not grow as fast as plants grown in white light.
Since plants are green, they absorb every color except green, and reflect green away. They can't use the light unless they absorb it.
Umm yeah I’m doing old work anybody wanna help
Cocci bacteria are atrichous?
Answer:
Yes
Explanation:
A) Atrichous is ur answer.. Since cocci bacteria are those bacteria which are oval or spherical in shape.