Answer:
Open channels allow an influx of sodium ions into the cytoplasm of the muscle fiber. The sodium influx also sends a message within the muscle fiber to trigger the release of stored calcium ions. The calcium ions diffuse into the muscle fiber.
Explanation:
Why is fossilization rare?||
Marine biologists in the Gulf Coast completed a population sample for Orcinus orca, commonly known as the Orca whale. The researchers captured and tagged 28 whales, then released them. One month later, they captured 18 whales, 3 of which had a tag. Estimate the total population of Orcinus orca in the Gulf Coast.
a
168
b
55
c
252
d
250
i think the correct answer of this qusion is 55
When Earth is directly between the moon and the sun,
A. a total solar eclipse occurs.
B. a lunar eclipse occurs.
C. a crescent moon is visible.
D. a partial solar eclipse occurs.
in a hypertonic solution, water will move ____ because there are too many solutes outside of the cell ?
A.both into and out of the cell
B. Out of the cell
C.into the cell
Answer:
B because it's a hypertonic solution... that means it's concentrated so water moves out of the cell into the solution
Answer: B
Explanation: hyper means above.
I NEED ASAP IM IN THE QUIZ
The diffusion of water molecules across a selectively permeable membrane is called
Group of answer choices
active transport
osmosis
endocytosis
facilitated diffusion
Answer:
I think it's true answer is D (not sure✌️)
Answer:
Osmosis
Explanation:
"Osmosis is a type of simple diffusion in which water molecules diffuse through a selectively permeable membrane from areas of high water concentration to areas of lower water concentration."
:)
How many segments are there in the spinal column?
31
22
45
101
Answer:
31
Explanation:
it says I need more words so here ya go
Hello friens is a banana a vegetable
Answer:
I don't even know
Probably not because when you search up if it is a fruit or vegetable it shows up fruit
i would say no banana is not a vegetable
because it has seeds
Paleontologists examine fossils embedded in sedimentary rock to help trace the history of animals that exist today and animals that have become extinct. What can the fossil record tell us about animals?
A. How animal behavior changes in response to new habitats
B. How animals have changed in different ways over time
C. Why animals all over the world look very different
D. Why all species of animals get larger over time
Answer:
B . Ex: A ancestor of megalodon shark was discoverd
and was compared with the meg , there were some resebelance
Explanation: Fossils can tell how animals evolved over time , and much more
During cellular respiration, most ATP is formed as a direct result of the net movement of
O hydrogen ions against a concentration gradient
electrons through a channel protein
potassium ions down a concentration gradient
o electrons against a concentration gradient
hydrogen ions down a concentration gradient
O potassium ions against a concentration gradient
protons against a concentration gradient
Answer:
protons against a concentration gradient.
Explanation:
Cellular respiration can be defined as a series of metabolic reactions that typically occur in cells so as to produce energy in the form of adenosine triphosphate (ATP). During cellular respiration, high energy intermediates are created that can then be oxidized to make adenosine triphosphate (ATP). Therefore, the intermediary products are produced at the glycolysis and citric acid cycle stage.
Hence, during cellular respiration, most adenosine triphosphate (ATP) is formed as a direct result of the net movement of protons against a concentration gradient in the electron transport chain.
Additionally, mitochondria provides all the energy required in the cell by transforming energy forms through series of chemical reactions; breaking down of glucose into Adenosine Triphosphate (ATP) used for providing energy for cellular activities in the body of living organisms.
Through the process of chemiosmosis, the H+ gradient is used to produce ATP molecules. During cell respiration, most ATP is formed as a direct result of the net movement of hydrogen ions down a concentration gradient.
---------------------------------
Let us review the oxidative phosphorylation process.
The electron transporter chain + chemiosmosis constitute the process of oxidative phosphorylation.
Chemiosimosis refers to the ATP production through a proton gradient
The electron transporter chain is a series of molecules and proteins located in the internal mitochondrial membrane. It constitutes a series of enzymatic reactions to release and save energy for the organism’s correct functioning.
Along the chain, there are four proteinic complexes in the membrane, I, II, III, and IV, that contain the electrons transporters and the enzymes necessary to catalyze the electrons' transference from one complex to the other.
Different redox reactions occur to pass electrons along the chain.
Released energy creates a proton concentration gradient used to synthesize ATP.
1) NADH provides electrons to the first complex, Complex I. From there, electrons go to the coenzyme Q that carries them to complex II. Meanwhile, complex I pomp four protons to the intermembrane space.
2) Complex II receives electrons from CoQ and also receives electrons from FADH2. Electrons are sent from complex II to ubiquinone Q that carries these electrons to complex III.
3) Complex III receives electrons from ubiquinone Q and pomps protons to the intermembrane space. Electrons are transferred to Cytochrome c.
Electrons travel from cytochrome c to complex IV.
4) Complex IV is the last complex that pomps protons to the intermembrane space.
5) Electrons are sent to O₂ molecules, which also receive protons in the matrix to create water molecules. Four electrons are needed to produce two water molecules from one O₂ molecule.
Since too many protons were pumped to the intermembrane space by complexes I, III and IV, an electrochemical gradient is created.
Protons tend to go back to the matrix, but they can only pass the membrane through an integral membrane protein.
H+ returns to the mitochondrial matrix through the ATP synthase.
While H+ passes to the matrix, ATP is produced by this Chemiosmotic process.
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Related link: https://brainly.com/question/20343904?referrer=searchResults
https://brainly.com/question/18843830?referrer=searchResults
Help me please!!!!
I am not good at science
Answer: Planting a seedless branch near...
Explanation:
what type is anomer?
Answer:
An anomer is a type of geometric variation found at certain atoms in carbohydrate molecules. An epimer is a stereoisomer that differs in configuration at any single stereogenic center. An anomer is an epimer at the hemiacetal/hemiketal carbon in a cyclic saccharide, an atom called the anomeric carbon.The anomeric carbon is the carbon derived from the carbonyl carbon compound (the ketone or aldehyde functional group) of the open-chain form of the carbohydrate molecule. Anomerization is the process of conversion of one anomer to the other. As is typical for stereoisomeric compounds, different anomers have different physical properties, melting points and specific rotations.
Explanation:
Scientists who study ocean life use an unmanned robot to collect deep sea data. The robots is known as a(n) __________.
A)
nereus
B)
aquarius
C)
deep sea robot
D)
underwater robot
E)
aquatic robot
Answer: A.) neurus
Explanation:
i looked it up
What is one reason the membrane proteins could not go where the Davson-Danielli model thought they should go, sandwiching the lipid membrane on either side? A. Proteins are hydrophobic, so they shouldn’t be in an aqueous environment. B. Proteins are not normally found in cells. C. There was not enough protein to cover both sides of the membrane. D. They were correct, the proteins do go there.
Answer: A. Proteins are hydrophobic, so they shouldn’t be in an aqueous environment.
Explanation: ummm Founder Education
Membrane proteins are part of the biological membranes. Proteins are hydrophobic, and lacking in an aqueous environment was the drawback of the Davson-Danielli model. Thus, option A is correct.
What is Davson-Danielli model?
Davson-Danielli gave the membrane model, which was also called a lipoprotein sandwich model. It was proposed to show the selective nature of the membrane structure and resembles a sandwich due to its structural organization.
The lipids were layered in between the two protein layers on either side making it look like a sandwich, but the model was rejected as it didn't explain certain permeable molecules.
The arrangement was also contradictory as the proteins are hydrophobic and were placed on the outer side making them exposed to the water molecules. This constricted the movement, and the model failed.
Therefore, the hydrophobic nature of the protein failed the Davson-Danielli model.
Learn more about the Davson - Danielli model here:
https://brainly.com/question/20373399
#SPJ5
What is it called when scientists carefully examine a new result by someone else in this field of study
its called peer review!
What are 3 structures that (prokaryotic) cells share with eukaryotic cells?
Answer:
Prokaryotic cells are surrounded by a plasma membrane and have DNA, cytoplasm, and ribosomes, like eukaryotic cells. They also have cell walls and may have a cell capsule. Prokaryotes have a single large chromosome that is not surrounded by a nuclear membrane.
Explanation:
Answer:
Prokaryotic cells are surrounded by a plasma membrane and have DNA, cytoplasm, and ribosomes, like eukaryotic cells. They also have cell walls and may have a cell capsule. Prokaryotes have a single large chromosome that is not surrounded by a nuclear membrane.
Explanation:
What are tectonic plates? *
A. large moving pieces of Earth's lithosphere
B. the inner core of the Earth
C. where magma rises up and solidifies
CAN SOMEONE PLEASEEEE HELP ME WITH THIS SCIENCE QUESTION THANK YOU!! (Explain how you got the answer)
Answer:
It's D.
Explanation:
It's D because pests can destroy crops and such which fall into the economic category
Why can the wolf be considered both a seconday consumer and a tertiary consumer?
Answer:
A wolf can be considered as both a secondary and primary consumer because they feed on both primary and primary and secondary consumers. As a secondary consumer, wolves can feed on plant eaters [primary consumers] such as elk which is an herbivore. As a tertiary consumer, wolf feed on secondary consumers such as deer.
Mark as brainlistt plzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
Could someone pls help me?
mitochondria.
it makes energy in the form of ATP.
Answer:
its D
Explanation:
The cell membrane performs several important functions in addition to separating the cytoplasm from the outside environment. It controls which molecules enter and leave the cell. The cell membrane is “selectively permeable,” which means it allows certain substances through and not others. One way that substances enter and leave the cell is through diffusion, the movement of particles from higher concentration to lower concentration. For example, if the concentration of salt molecules is higher inside the cell than outside, salt particles will move out of the cell. Diffusion is a type of passive transport, a movement of particles that does not require energy to occur. Facilitated diffusion is a kind of passive transport where proteins in the cell membrane help particles move from high to low concentration.
The cell membrane functions most like a?
Answer:The cell membrane controls the movement of substances in and out of cells and organelles. In this way, it is selectively permeable to ions and organic molecules.
Explanation:
QUESTION:
Evolution never occurs in a straight line. There are always branches and nodes that can be seen along the way. Based on the image, which two statements are true?
ANSWER CHOICES (have to pick 2 answers)
A. All organisms have had one common ancestor in the past.
B. Chimpanzees are more evolved than all other organisms.
C. Gorillas share an extinct ancestor with bonobos.
D. Humans and chimpanzees are equally evolved.
E. Orangutans are unrelated to gorillas or bonobos.
The correct answer iare A. All organisms have had one common ancestor in the past, and C. Gorillas share an extinct ancestor with bonobos.
Explanation
The image shows an evolutionary tree that resulted in species such as the chimpanzee, orangutan, gorilla, bonobo, and humans. This tree shows nodes, which are the points shown on it. These nodes represent an extinct species as a common ancestor of the species of the next node that are connected to it. Therefore, the correct answers are A. All organisms have a common ancestor in the past, this statement is true because all the species shown in the tree are the result of different divisions of a first species that lived 13 million years ago. The second correct statement is C. Gorillas share an extinct ancestor with bonobos. Because in the graph it can be seen that 6 million years ago there was a node/species that is the common ancestor of the gorilla and the bonobo.
Which statement below best describes the difference between "cytokinesis" in animal cells and plant cells? (choose all that apply)
In animal cells a cell plate forms and the cells do NOT pinch apart
There is not a difference in cytokinesis in plant and animal cells
In animal cells a cleavage furrow forms and the new cells pinch apart
In plant cells a cell plate forms, the new cells do NOT pinch apart
The difference between cytokinesis in animal and plant cells is that a cleavage furrow forms in animal cells and the new cells pinch apart.
Cytokinesis is the division of cytoplasm at the end of mitosis leading to the production of 2 independent daughter cells from a single cell.
Animal cells lack a cell wall. Thus, the cell membrane bends inward to form a cleavage furrow that eventually leads to the separation of the new cells.
The presence of a cell wall in plant cells means that a cleavage furrow cannot be formed like animal cells. Instead, a new cell wall, otherwise known as the cell plate, just forms to separate the two nuclei at the opposite poles of the mother cell.
More on cytokinesis can be found here: https://brainly.com/question/221186
Answer:
Plant cells deposit vesicles containing cell wall building blocks on the metaphase plate; animal cells form a cleavage furrow.
5. Challenge: To balance the inputs and outputs of photosynthesis, there should be the same number of
carbon, oxygen, and hydrogen atoms on each side of the arrow.
A. Is the formula balanced as written? Why or why not?|
B. Now balance the input/output formula by adding coefficients to each molecule. Write the balanced
formula below, and then check your work by clicking Balance.
The missing equation of the question is -
CO2 + H2O ⇒ C6H12O6 + O2
Answer:
No, the given equation is not balanced as the right side of the arrow has more atoms of C, H, and O.
Explanation:
Given equation
CO2 + H2O ⇒ C6H12O6 + O2
A. It is the equation for the reaction of photosynthesis which converts free carbon dioxide from the atmosphere and water into food or sugar. The given reaction is not balanced as there are different numbers of atoms of carbon, hydrogen, and oxygen present on both sides of the arrow. On the right side of the arrow atoms of C, H, and O are more than on the left side.
There are 6 carbon atoms present on the right side of the arrow whereas there is only 1 on the left side similarly hydrogen atoms are 12 and oxygen atoms are 8 in number whereas on the left side number of hydrogen are 2 and three atoms of oxygen.
B. The correct and balanced equation is :
6CO2 + 6H2O ⇒ C6H12O6 + 6O2
: cell energy lab
because yeah and because i did this
Water changes its state of matter when heat is added or taken away. When water reaches its boiling point the particle
Answer: When a liquid changes to a gas
Gases hold so much energy that the molecules are moving so quickly they literally jump out of a liquid and begin flying around the room. It is at this temperature that a substance is holding as much heat energy as it can hold, so it's temperature stops increasing, even if more heat is added.
This is the temperature at which a substance has reached it's heat capacity/specific heat. i am so sorry if it is wrong
Explanation:
The muscle contract and relax based on orders delivers from the nervous system. (true or false)
Answer:
true
Explanation:
hope this helped. the enevers control how the muscles react to certain situations. so they tell muscles to relax and to tense up
Codons are
base "words" that code for specific amino acids. They are
and never
the words.
Answer:
Codons are 3 base “words” that code for specific amino acids. They are nonoverlapping and never have gaps between the words.
Explanation:
Just took the test
Answer:
yes, the correct answers are as follow:
1. 3
2. nonoverlapping
3. have gaps between
Explanation:
I got it right in edg 2020. Hope this is of help :)
A plant root is an example of
Answer:
organ
Explanation:
A plant root is a example of an organ
Answer:
Plant root is example include cassava, sweet potato, beet, carrot, rutabaga, turnip, parsnip, radish, yam and horseradish. i tryed my bestt
Explanation:
Explain the results you obtained. Include concentration differences and membrane pore size in your discussion.
Explanation:
The results show that the water, glucose, and IKI molecules were small enough to pass through the selectively permeable membrane. ... Based on the size of the molecules, the glucose and IKI would move out of the bag and the water would go in.
What arguments have been made with respect to the campaign for “clean coal”?
Answer:
Explanation:
Clean coal involves the use of technology to mitigate the health and environmental effects of burning of coal by capturing the emissions thereof. Since burning of coal (combustion) will normally release carbon or it's compounds; this is considered as a huge contributor to global warming, which is affecting lives on the planet. Thus, capturing combustion emissions such as carbon dioxide could help mitigate the effect of global warming.
Other gases emitted from the burning of coal are sulphur (IV) oxide, SO₂ and nitrogen oxides, which are huge causes of acid rain. SO₂ have been suggested to be removed from the atmosphere by flue-gas desulfurization while NO₂ has been suggested to be removed by selective catalytic reduction.
These arguments have been made to protect the earth and the lives that live on it since global warming and acid rain affect the lives of plants and animals while global warming affect the earth's climate.
Which term means "without the
ability to speak or make sounds"?
A. aphonia
B. anoxia
C. anemia
D. apnea
Answer:
It is A
Explanation:
Loss of ability to speak through disease of or damage to the larynx or mouth.
