Answer:active transport
During active transport, ATP is required to move a substance across a membrane, often with the help of protein carriers, and usually against its concentration gradient. One of the most common types of active transport involves proteins that serve as pumps.
Which phrase describes organisms that formed index fossils?
(a) Are extinct
(b) Had soft parts
(c) Were generally large
(d) Lived in a narrow geographic area
Answer:
A.) Are extinct
You should mark me brainliest because I think I'm cool
the difference between prokaryotic and eukaryotic gene regulation
Answer:
READ THIS
Explanation:
To understand how gene expression is regulated, we must first understand how a gene codes for a functional protein in a cell. The process occurs in both prokaryotic and eukaryotic cells, just in slightly different manners.
Prokaryotic organisms are single-celled organisms that lack a cell nucleus, and their DNA therefore floats freely in the cell cytoplasm. To synthesize a protein, the processes of transcription and translation occur almost simultaneously. When the resulting protein is no longer needed, transcription stops. As a result, the primary method to control what type of protein and how much of each protein is expressed in a prokaryotic cell is the regulation of DNA transcription. All of the subsequent steps occur automatically. When more protein is required, more transcription occurs. Therefore, in prokaryotic cells, the control of gene expression is mostly at the transcriptional level.
Eukaryotic cells, in contrast, have intracellular organelles that add to their complexity. In eukaryotic cells, the DNA is contained inside the cell’s nucleus and there it is transcribed into RNA. The newly synthesized RNA is then transported out of the nucleus into the cytoplasm, where ribosomes translate the RNA into protein. The processes of transcription and translation are physically separated by the nuclear membrane; transcription occurs only within the nucleus, and translation occurs only outside the nucleus in the cytoplasm. The regulation of gene expression can occur at all stages of the process (Figure 1). Regulation may occur when the DNA is uncoiled and loosened from nucleosomes to bind transcription factors (epigenetic level), when the RNA is transcribed (transcriptional level), when the RNA is processed and exported to the cytoplasm after it is transcribed (post-transcriptional level), when the RNA is translated into protein (translational level), or after the protein has been made (post-translational level).
Answer:
Prokaryotic gene expression is primarily controlled at the level of transcription. Eukaryotic gene expression is controlled at the levels of epigenetics, transcription, post-transcription, translation, and post-translation.
Siphoning of wetlands in Iraq has led to
a. rising sea levels
b. drought
c. an increase in biodiversity
d. them becoming arid desert
Answer:
its D
Explanation:
them becoming arid desert. just took the test and got a 100 :)
Answer:
D because Iraq though the years became a dry sandy desert mostly made up of desert mountains to this day
Explanation:
A isn't right it'll be less of a desert but also less land, the mountains also only makes of a a bit of a quarter or more of the land
B is a possibility but wont explain how it is today nor on it's conditions
C is wrong as it's the opposite of now
A scientist grew an Elodea plant in a freshwater aquarium. She removed a leaf from the plant and placed the leaf in a hypertonic solution containing 8% salt in order to observe what happened to the cells within the leaf. When she looked at the cells under a microscope, she noticed that the cells in the leaf shrunk. Which statement best explains what caused the cells to shrink?
The hypertonic solution caused the water in the cell to move from the cytoplasm into the nucleus.
The salt moved from the hypertonic solution into the cell and chemically bonded with the water.
The salt within the cell moved through the cell membrane into the solution with the higher salt concentration.
The water within the cell moved through the cell membrane into the solution with the lower water concentration.
Answer:
The water within the cell moved through the cell membrane into the solution with the lower water concentration.
Explanation:
According to this question, a scientist removed the leaf of a plant originally grown in a freshwater aquarium and placed it in a hypertonic solution containing 8% salt. Firstly, A HYPERTONIC SOLUTION is that solution which contains a higher solute concentration than that of the intracellular environment.
Due to this concentration gradient i.e. difference in concentration, OSMOSIS process will be triggered. Osmosis is the movement of water from the region of low solute concentration (the leaf cells) to a high solute concentration (the salt solution) via a semi-permeable membrane (cell membrane).
Therefore, osmotic process causes water to move from the leaf cells into the salt solution via the cell membrane. hence, causing the cells of the leaf to shrink.
THE IMAGE ABOVE DEPICTS ____ WAVES (PLEASE HELPP ILL GIVE 85 POINTSS)
Answer:
I think its Transverse waves
Answer:
Its actually a surface wave I got this right on my test lol
Explanation:
Convection currents can be described best by:
a. Hot air rising, cold air sinking
b. Cold water rising, hot water sinking
C. Random distribution of temperatures
d. Hot air sinking, cooler air rising
Answer:
A.Hot air rising,cold air sinking
Explanation:
Hot air rises in a confined or closed space.That is one of the reasons why firefighters have some people crawl on the flour to get out. the smoke is hot air so it rises to the ceiling of the room, while cold air stays lower.
An animal cell with a 30% salt solution is placed in a beaker with a 20% salt
solution. Which is the correct conclusion if the cell remains in the beaker for an
extended period of time?
Answer:
the animal cell will burst
Explanation:
If the salt solution in the animal cell is 30%, it means the water is at a 70% concentration. Outside is 20%, so the water is 80%.
Water will enter the cell. Water is at a higher concentration outside the cell (80%) or a lower concentration inside the cell (70%) by the process of osmosis.
Eventually, the animal cell will burst, because it does not have any cell wall to control the swelling of the cell that occurs as water flows in.
HELP PLEASE
Witch of the following would introduce a bias into an experiment?
A. Publishing your experimental results in a scientific journal.
B. Allowing other scientist to repeat and verify your experimental results.
C. Using a computer to record and store your data.
D. Discarding data that does not fit with your personal expectations.
Answer:
D. Discarding data that does not fit with your personal expectations.
Explanation:
One of the ways in which bias can be introduced into an experiment is by discarding data that does not fit with one's personal expectations.
Bias in an experiment is the process whereby scientists alter the results of their experiment to achieve their own expected results.
Anomalous values defined by one's expectation can make an experiment highly biased. A scientist is supposed to be objective in their experimental approaches.It can be more than one
Answer:
Only the matter stored in body tissues
Explanation:
Cuz the seal took some of the matter for itself :)
What would occur if a nitrogen base in the RNA strand is mis-matched? How would that affect the protein? How could that affect the organism?
Answer:
Errors during Replication. DNA replication is a highly accurate process, but mistakes can occasionally occur as when a DNA polymerase inserts a wrong base. Uncorrected mistakes may sometimes lead to serious consequences, such as cancer.
In mismatch repair, mistakes that happen during DNA replication are recognized, cut out and replaced. ... This mismatched base pair causes a point mutation, which you can think of as a typo in the DNA sequence of the new strand.
Explanation:
Incorrectly paired nucleotides cause deformities in the secondary structure of the final DNA molecule. During mismatch repair, enzymes recognize and fix these deformities by removing the incorrectly paired nucleotide and replacing it with the correct nucleotide.
Eukaryotes have solved the end-replication problem by locating highly repeated DNA sequence at the end, or telomeres, of each linear chromosome. In humans and other vertebrate organisms, the sequence of nucleotides in telomeres is TTAGGG, is repeated between 100 and 1000 times.
what is the parts of earths atmosphere help ill give brainliest *URGENT*
Why are some question that scientists are asking about plant at space?
Answer:
some questions scientist are asking is if plants grow faster in space and if stars can be turned into plants.
Explanation:
carrying capacity can vary depending on environmental conditions.
True or False
Answer:
true
Explanation:
true or false?
plz answer
Answer:
True
Explanation: This is to ez
What is the effect of temperature on ATP,NADPH, and sugars? Will the increase, decrease, or stay the same?
Answer:
1. ATP will increase
2. NADPH will increase
3. Sugar will decrease
Explanation:
Had the same problem
The effect of temperature on these molecules are ;
ATP will increase NADPH will also increase while Sugars will decreaseATP ( Adenosine triphosphate ) is the molecule in cells which stores energy in cells while transferring the energy needed within cells as well. When the temperature of a cell is raised above the required temperature this molecule will also increase in response.
NADPH is an electron donor which is found in organisms, it also provides the reducing power for certain reactions in the organism ( anabolic ) and the gathering of NADPH oxidase. increases as the temperature of the organism increases.
Hence we can conclude that as temperature increases , ATP will increase , NADPH will increase while Sugars will decrease.
Learn more : https://brainly.com/question/18072409
How do the circulatory and nervous systems work together to maintain homeostasis | ASAP
Answer:
The circulatory and the nervous systems work together to maintain homeostasis because the circulatory system gives your brain a lot of oxygen and glucose while your brain regulates your heart rate and blood pressure. Meanwhile, your bones are busy making new blood cells. Working together, these systems maintain homeostasis.
Hope this helps!
Which of the following processes releases energy to be used by a cell?
A: A phosphate group is added to ATP to form ADP.
B: A phosphate group is removed from ADP to form ATP.
C: A phosphate group is added to ADP to form ATP.
D:A phosphate group is removed from ATP to form ADP.
Many species of microorganisms live on and within the bodies of
larger organisms. These microorganisms affect the health of other
organisms in both positive and negative ways. Which statement describes
the role of a microorganism that has an unhealthy effect on humans?
Answer:
It would be a parasite, you forgot the answer choices btw.
Explanation:
Carson divided 40 unripe bananas evenly among eight paper bags and sealed the bags. He poked 20 small holes in four of the bags and left the other four without holes. He kept the bags at room temperature for three days. Then, Carson opened the bags and counted the number of brown spots on each banana. He compared the average number of brown spots on bananas from bags with holes to the average number of brown spots on bananas from bags without holes.Identify the question that Carson's experiment can best answer.
Answer:
See the answer below
Explanation:
From the illustration of the experiment, the question that Carson can best answer is that "Do bananas develop more brown spots if they are kept in bags with holes compared to bags without holes?"
The independent variable in the experiment is the hole poked in the bags while the dependent variable is the number of brown spots on each banana. The difference between the subjects is the hole poked in the bags, hence, any difference in the number of brown spots between bananas in the bags with holes and those in the bags without holes can be attributed to the hole poked in the bags.
Therefore, the question that can be answered from the experiment is to see if poking holes in bags make bananas to develop more brown spots compared to bags without holes.
What causes mutations during protein synthesis?
A) A wrong base becomes a permanent part of a new DNA sequence.
B) Most mutations happen spontaneously as DNA replicates itself.
C) A great many mutations occur due to chemicals in the environment.
D) Mutations do not occur during the process of protein synthesis.
Answer:
B is the correct answer i believe
Why does the skeletal system contain both immovable and movable joints? A. Immovable joints allow my bones to move; movable joints connect my bones. B. Immovable joints connect my bones; movable joints allow my bones to move. C. Both kinds of joints allow the skeletal system to store materials. D. Both kinds of joints allow the skeletal system to protect organs.
Answer:
The correct answer is - option B. immovable joints connect my bones; movable joints allow my bones to move.
Explanation:
In the skeletal system, both immovable joints and movable joints are present and both have a distinct role in the body and skeletal system. The immovable joints are the joints that provide the stability to the bones that are connected and maintain the structure these joints also helps in protecting the organs.
Movable joints are the joints that are helpful in movement and allow bones that are connected to feely or up to a limit move.
Thus, the correct answer is - option B. immovable joints connect my bones; movable joints allow my bones to move.
Answer:
B
Explanation:
immovable joints connect bones well that a correct answer
Which effect does the sun's energy have on a comet?
A. It causes the comet to form a bright tail.
B. It causes the core of the comet to melt.
C. It causes the comet to turn toward earth.
D. It causes the comet to break apart.
Answer:
The answer is B because the sun melts the core of the comet
The sun's energy causes the comet to form a bright tail. The correct answer is A.
When a comet approaches the Sun, the Sun's energy causes various effects on the comet.
As the Sun heats up the comet, it causes the icy nucleus of the comet to vaporize and release gas and dust into space.
This process is known as outgassing. The released gas and dust form a glowing envelope called a coma around the nucleus.
Additionally, solar radiation and solar wind push the released gas and dust away from the comet, forming a glowing tail that points away from the Sun.
So, the correct option is A.
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Differentiate between pathogens and vectors
Answer:
A pathogen is an agent that causes disease, such as a virus, bacterium, protozoan, or parasite. A vector is an organism, often an arthropod, that carries a pathogen to its host. So, for example, for malaria the pathogen is a protozoan called Plasmodium, and the.
Explanation:
A single strand of DNA contains:
Answer:
A single strand of DNA is a polymer of nucleic acids joined covalently between the phosphate group of one and the deoxyribose sugar of the next to for a “backbone” from which the nitrogenous bases stick out. In its natural state, DNA has two strands wound around each other in a double helix.
Explanation:
Diffusion takes place
Group of answer choices
only through a lipid bilayer membrane.
from an area of low concentration to an area of high concentration.
from an area of high concentration to an area of low concentration.
only in liquids.
[tex]\large\underline{\bf\red{Diffusion:-}}[/tex]
It is the process of movement of substances from a region of higher concentration to a region of lower concentration .
Hence correct option is [ c ] .
More to know about topic .
Diffusion :-
Water from soil is absorbed by plants by Diffusion.Amoeba exchanges Carbon dioxide & Oxygen by the process of Diffusion.It is a form of passive transport .It does not utilises energy .Please help me!!!!!!!!!!!
Answer:
Its option 3 hope this help with your test good luck
Rooted plants are most likely found in which aquatic zone?
a. pelagic
b. littoral
benthic
d. all of the above
C.
Please select the best answer from the choices provided
Answer:
littoral
Explanation:
What predication can you make about future levels of carbon dioxide CO2 in the atomphere
surface area of 1x1x8
Answer:
What's the surface area of 1x1x8?
Explanation:
34 feet squared! Hope that helps.♡
Answer:
34 feet squared
Explanation:
Iron reacts with sulfur to form iron sulfide. If 60 grams of iron reacts with sulfur to produce 90 grams of iron sulfide, how much sulfur has been used in the chemical reaction?
A.
60 grams
B.
150 grams
C.
120 grams
D.
30 grams
Answer:
Its D. 30 grams:)
Explanation: