Answer:
The geologic time scale is the “calendar” for events in Earth history. It subdivides all time into named units of abstract time called—in descending order of duration—eons, eras, periods, epochs, and ages.
Explanation:
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Which group of organisms in an ecosystem does the niche of recycling organic matter back to the environment 
Decomposers are organisms that break other organisms down and return nutrients back to the soil. Therefore, they also recycle organic matter back to the environment, making choice 2 the correct answer choice.
Question 1 (1 point)
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Which statement illustrates an exception to the concept that the cell is the unit of structure and function of all living things?
A)The cell is a complex chemical factory
B)Viruses contain genetic information but lack other cellular components.
C)lysosomes contain hydrolytic enzymes
D)Cells that possess a cell wall are non-living
Answer:
I think the answer is d, as the cell possess a cell wall are non living
Why should you never smell a chemical directly?
A. Many chemicals have no smell.
O B. All chemicals smell the same.
C. You cannot learn anything by smelling.
D. Some chemicals can hurt your windpipe.
Answer:
D
Explanation:
Some chemicals can hurt your windpipe
Answer:
D
Explanation:
by directly smelling something you are ingesting tiny particles of it, which is why directly smelling a chemical is a bad idea.
Carbohydrates are made of carbon, hydrogen, and ________.
Hello! Your answer would be,
Most carbohydrates are composed entirely of carbon, hydrogen and oxygen atoms. A carbohydrate has three or more carbon atoms, at least two oxygen atoms and multiple hydrogen atoms. Some carbohydrates also contain nitrogen atoms, such as chitin which is found in insect shells.
Answer:
Oxygen.
Explanation:
Carbohydrates are glucose where its formula is C6H12O6 so it consist of carbon, hydrogwn and oxygen.
Where and how do hurricanes form?
Explanation:
Hurricanes form over the warm ocean water of the tropics. When warm moist air over the water rises, it is replaced by cooler air. The cooler air will then warm and start to rise. This cycle causes huge storm clouds to form.
Hurricanes can be defined as a serious type of storm which forms over
tropical or subtropical waters.
Hurricanes typically forms in the warm ocean water of the tropical or
subtropical regions
Hurricane involves the warm moist air over the water rising due to
evaporation which is then replaced by cooler air. The cooler air then warms
up and start to rise and then the cycle continues. This continuous cycle
makes huge storm clouds to form.
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A ______ Membrane allows some, molecules to cross
Answer:
Cell theory
Explanation:
Also known as the cell membrane.
Answer:
selectively permeable
Explanation:
just studied this !
Which of the following correctly illustrates a dipeptide and an amino acid in the optimal position to form a tripeptide?
The options in the question are shown in the image attached to this answer
Answer:
A
Explanation:
A peptide bond is formed between a carboxylic acid and an amine group. These two functional groups must be in the correct orientation before they can react to form the peptide bond.
If we study the images closely, only the amine group and carboxylic acid in option A are correctly positioned for reaction to take place leading to the formation of a third peptide bond.
Amino acids connect by peptidic bonds to form the linear structures of proteins. In the peptidic bond, the amino group joins the carboxylic group, and a water molecule is released. Among the options, A is the correct one.
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Amino acids are organic molecules.
They are composed of a central carbon, one hydrogen atom, one carboxyl group (COOH), one amine group (NH₂), and one R group. The composition of the R group is what makes them different from each other.
Proteins are amino acid polymers linearly arranged and connected by peptidic bonds.
The number of amino acids composing the chain and their order determines the primary structure of the protein.
The protein is synthesized from the amino terminus to the carboxy terminus.
The peptidic bond is the union of two amino acids by their carboxyl and amine groups.
When they get together, a water molecule is released, producing a covalent bond ⇒ CO-NH.
Peptidic bonds only form linear structures, with no ramifications, known as peptides.
In this way, every peptide has a free carboxylic group in one extreme and a free amine group in the other extreme.
Among the given options, the correct position of the dipeptide and the amino acid to form a tripeptide is option A.
By looking carefully at the position of the molecules, we can see that this is the only option in which a carboxylic group and an amine group are facing. This orientation is the only one possible for the peptidic bond to form.COOH and NH₂ must get together, releasing a water molecule, and creating the covalent bond CO-NH.
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Many different types of mutations can occur within the body. Cystic fibrosis is a genetic disorder that is caused by different mutations within the CFTR gene. One mutation in the CFTR gene that leads to cystic fibrosis causes translation to end earlier in the gene sequence. Which type of mutation causes this translation error that leads to cystic fibrosis?
silent
missense
nonsense
deletion
Answer:
Deletion
Explanation:
I think it is the last one
Deletion
If it really helped please give me brainliest
A nonsense mutation is one mutation in the CFTR gene that leads to cystic fibrosis causes translation to end earlier in the gene sequence.
Cystic fibrosis is a genetic disorder that is caused by different mutations within the CFTR gene.
The CFTR gene codes for the CFTR protein whose function is as an anion channel (chloride ion) which helps control the movement of water in and out of the membrane of cells that are specialized to produce mucus, sweat, saliva, tears and digestive enzymes
When CFTR protein is defective or absent, thick, sticky mucus accumulates in these cells, obstructing the airways and glands.
The most common mutation of the CFTR gene is a deletion whereby the codon for the amino avid phenylalanine is deleted resulting in the production of a defective CFTR protein.
Another form of mutation in the CFTR gene is a nonsense mutation in which a stop codon is inserted in the middle of the gene resulting in the production of a shortened CFTR protein, which is then degraded by the cell.
Therefore, a nonsense mutation in the CFTR gene leads to cystic fibrosis by causing translation to end earlier in the gene sequence.
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explain how sea floor spreading affects the earths crust
What is the best reason for the scientific community to accept a theory? The theory is supported by all the available observations and data. An award-winning scientist proposed the theory. The majority of the general public agrees with the theory. The theory contradicts an older theory.
Answer:
The theory is supported by all the available observations and data.
Explanation:
The scientific community will accept a theory when a sufficient body of evidence supports it. This includes experiments that refute other potential theories. Experiments should also be carried out that attempt to disprove the theory but cannot.
It should not matter who proposed the theory or who supports it, and instead should entirely be based on the quality and abundance of data supporting it.
Answer:
The theory is supported by all the available observations and data.
Explanation:
The picture shows a cell model and the solutions
associated with it. In this situation the cell model will
Answer:
Increase in solute content
Explanation:
Cells sometimes use passive trarert
to move Dholecules across their
membranes. The rate at which a cell
engages in passive transport is
determined by -
A the number of vacuoles that the
cell contains.
B the composition of the cell
membranes.
C the size of the cell's chloroplasts.
D the amount of energy that the cell
generates.
Which level of organization is characterized by a group of cells that work together to perform a common function?
organ
O tissue
O organ system
O organism
Save and Exit
Next
Submit
lark this and return
Answer:
Tissue
Explanation:
Tissue is a group of cells that work together for a specific function such as making your muscles move.
Tissue level of organization is characterized by a group of cells that work together to perform a common function
A group of cells that work together to perform a common function is known as a tissue. Tissues can be classified into four main types: epithelial, connective, muscular, and nervous tissue.
Epithelial tissues are responsible for covering and lining surfaces, while connective tissues provide support and protection to the body. Muscular tissues enable movement, while nervous tissues control and coordinate body functions.
Therefore, Tissues are the building blocks of organs that are made up from cells , which in turn make up organ systems, and ultimately form an organism.
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Muscle cells of athletes often have more mitochondria than the muscle cells of nonathletes. Based on this observation, it can be inferred that the muscle cells of athletes
A)have a smaller demand for cell proteins than the muscle cells of nonathletes
B)reproduce less frequently than the muscle cells of nonathletes
C)have nuclei containing more DNA than nuclei in the muscle cells of nonathletes
D)have a greater demand for energy than the muscle cells of nonathletes
Answer: D) Have a greater demand for energy than the muscle cells of nonathletes
Hope this helps :)
Explanation:
(d) have a greater demand for energy then the muscles of
nonathletes
How is Mitosis and Meiosis similar?
Answer:
they produce new cells
Explanation:
follow same steps
begin with parents cell
i hope it helped
35. Which statement best describes the cell membrane of a living plant cell?
A. It selectively regulates the passage of substances into and out of the cell.
B. It is composed of protein and carbohydrates only.
C. It has the same permeability to all substances found inside or outside the cell.
D. It is a double protein layer with floating lipid molecules.
Answer:
The cell membrane of a living plant cell selectively regulates the passage of substances into and out of the cell (option A).
Explanation:
The plasma membrane in a living plant cell is composed of a double lipid layer that gives it hydrophobic character and acts as a semi-permeable barrier. The partial permeability of the substances allows regulating the passage of substances from and to the interior of the cell.
At the level of the plasma membrane there are several mechanisms and transport to allow the entry of substances needed for the cell or the output of synthesized products or metabolic waste, thus regulating the passage of substance in a selective way.
Regarding the other options:
B. Plasma membranes are composed of lipids, not just carbohydrates and proteins.
C. Permeability is not for all substances, but is selective.
D. Plasma membrane is a lipid bilayer, not a double layer of proteins.
In which cell below would a student likely observe a cell plate during mitosis?
A: Rat muscle cell
B: onion root cell
C: human lung cell
D: alligator stomach cell
Answer:
B. Onion root cell
Why do you think carbon has an entire branch of
chemistry devoted to its study?
Answer:
Carbon has the ability to form 4 bonds with surrounding atoms. It can also form branches, which can be tens of hundreds of carbons long. There are millions of variations of carbon-containing compounds, so a whole branch of chemistry is needed in order to comprehend them.
i need help with this pls
Answer:
Probably C.
Explanation:
Use the process of elimination, it can't be B because a theory isn't a fact, it's using evidence to come to a conclusion, and that immediately scratches out D as well.
This means that prokaryotes are referent o as”_______cells”.
Answer:
Prokaryotes cells
Explanation:
HOPE THT HELPS!
Plants are able to produce energy from sunlight through photosynthesis. How do the products of photosynthesis in plants benefit animals, who cannot produce energy from sunlight?
Answer:
They produce sugars in order to survive and grow. Animals eat plants and take advantage of the nutrients produced by the plants. They also breathe in the oxygen produced as a by-product of photosynthesis
Explanation:
Plants use the energy in sunlight, water, and carbon dioxide to produce sugars which are used to provide chemical energy to power cellular processes. These sugars are also stored as starches.
Animals cannot produce their own food, and instead, rely on plants and other animals as a food source to power their own processes. Animals eat plants and obtain the food that plants have produced by photosynthesis. This is mostly carbohydrates (sugars and starch) but also some fats, proteins, and vitamins.
True/False: Canada is considered to be part of the continent of North American *
25 points
True
False
Answer:
True
Explanation:
In contrast to the common definition of "North America", which encompasses the whole continent, the term "North America" is sometimes used to refer only to Mexico, Canada, the United States, and Greenland. The term Northern America refers to the northernmost countries and territories of North America: the United States, Bermuda, St. Pierre and Miquelon, Canada and Greenland. The largest countries of the continent, Canada and the United States, also contain well-defined and recognized regions.
plz mark as brainliest
Answer:
true
Explanation:
When a phosphate is transferred from ATP, it can phosphorylate another molecule. How could this assist in allowing a protein to transport molecules against their concentration gradient?
Energy cell harvesting is impotant. Cells need energy so they can move from one place to another and ATP helps that. ATP is consiered "energy currency" of the cell and it's useful for storing egery and helping molecules/cells move around.
Protein to move against concentration gradient requires energy. Protons go trhough a protein channel called ATP synthase which helps them move out of the mitrochonrial matrix.
The phosphorylation of another molecule can assist a protein to transport molecules against their concentration gradient by energizing them.
PHOSPHORYLATION:
Phosphorylation is the process by which a phosphate group is added to another molecule. Adenosine triphosphate (ATP) loses a phosphate group to another molecule in the process of phosphorylation to energize the molecule. This is the process by which energy is released for use. Moving molecules against a concentration gradient requires energy input in form of ATP, hence, phosphorylation can assist a protein to transport molecules against their concentration gradient by energizing them.Learn more at: https://brainly.com/question/15967997?referrer=searchResults
When a cell gains water, what will happen to its size and mass?
Answer:
The cell will swell up and eventually burst.
Explanation:
Cells swell if there’s more salt in a cell than outside it, the water will move through the cell membrane into the cell, causing it to increase in size. if too much water gets in, the cell will burst.
Prokaryotic and Eukaryotic cells differ in that _________________cells have membrane-bound organelles, and __________ cells do not have a nucleus.
Answer:
Eukaryotes have membrane bound organelles, and Prokaryotes dont have a necleus.
Explanation:
Eukaryotes have membrane bound organelles, and Prokaryotes dont have a necleus.
Answer:
Prokaryotic and Eukaryotic cells differ in that Eukaryotic cells have membrane-bound organelles, and Prokaryotic cells do not have a nucleus.
Explanation:
So, Prokaryotic cells, are mainly found in multicelled organisms. They are cells whose nucleus is not held by a membrane.
Eurkroyates on the other hand, are cells that have a membrane-bound nucleus and/or organelles as their major characteristic.
Hope this helped you!
He waited beside her until the great snake came for its prey; then he cut its head off just as he had the Gorgon's. The headless body dropped back into the water; Perseus took Andromeda to her parents and asked for her hand, which they gladly gave him. Based on this excerpt, what is most likely true about ancient Greek marriage rituals? The groom had to perform a brave feat before marrying the bride. The groom had to ask the bride’s parents for permission to marry her. The bride’s parents made all the arrangements for the couple’s marriage ceremony. The bride’s parents chose whom the bride would marry when the girl was very young.
Answer:
The correct answer is:
The groom had to ask the bride’s parents for permission to marry her.
Explanation:
Marriage in ancient Greek was less of a personal relationship than it was a social relationship. Asking a parent or guardian by the groom for permission to marry the bride is a tradition that spans several cultures and was also evident in ancient Greek marriage rituals. The permission is usually given by the father, and once that happens, the couple is officially engaged. Marriages were also arranged through the meeting of the fathers of the young couple, basing the marriage on their interests in expanding a business or forging an alliance between the families, with little concern about what the groom thought of the situation, and no regard for what the wife wished
Answer:
B. The groom had to ask the bride's parents for permission to marry her.
Explanation: This is the correct answer on Edge 2021, just took the quiz. Hope this helps ^-^.
Do you think partial melting will occur if there is too much amount of water in the subduction zone?
Answer:
Water plays a crucial role in the melting of Earth's mantle. ... At oceanic subduction zones, water released by the subducted slab may induce melting of the overlying mantle wedge or even the slab itself, giving rise to arc magmatism, or may evolve into a supercritical fluid.
4. What are the functions of the nucleolus? (Choose all that apply)
regulating the cell's interaction with its surroundings
beginning ribosome assembly
translating the code contained by the DNA into the proteins the cell needs for structure and function
converting energy from food into a form the cell can use
Answer:B NUCLEOLUS IS WHERE DNA IS STORED
BRAINLIEST MEEEE
Explanation:
The nucleolus is the most conspicuous domain in the eukaryotic cell nucleus, whose main function is ribosomal RNA (rRNA) synthesis and ribosome biogenesis. AKA DNA !!!!
The function of the nucleolus includes 'beginning ribosome assembly'.
The nucleoli are eukaryotic organelles located within the cell nucleus that act as ribosome factories, in which the process of transcription (i.e., RNA synthesis) occurs constantly.
The nucleolus serves to make ribosomal subunits and then it sends ribosomal subunits to different cell destinations where they form full ribosomes.
In conclusion, the function of the nucleolus includes 'beginning ribosome assembly'.
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Put the following parts of a river in order from beginning to end:
A. source
B. delta
C. main river channel
D. mouth
A). A, C, B, D
B). A, C, D, B
C). D, C, B, A
D). D, C, A, B
Answer:
B
Explanation:
The river delta is created by deposition of sediment that is carried by a river as the flow leaves its mouth and enters slower-moving or stagnant water.