Answer:
contact inhibition.
Explanation:
This is how healthy cells know when to stop dividing. and a process called contact inhibition is when normal, healthy cells are touching other cells on all sides, they have a red light in the cell cycle and do not divide
I Hope This Helps!!!!
Answer:
cell cycle
Explanation:
The process then repeats in what is called the cell cycle. Cells regulate their division by communicating with each other using chemical signals from special proteins called cyclins. These signals act like switches to tell cells when to start dividing and later when to stop dividing. I don't understand what you are saying, but hope this helps!
Which type of fossil does this image depict?
A.
cast
B.
carbon imprint
C.
mineralized fossil
D.
original-tissue fossil
Answer:
this is a mineralized fossil
Explanation:
Answer:
its a cast. i took a test and got it right <3
Explanation:
4. At night a similar event takes place (as that described in #3 above). As the sun goes down,
the air contains a certain amount of water vapor. The air then begins to cool
and eventually the air reaches the dew point. What is the dew point and what would form
at this point?
100points?
Answer:
its t0 wlsllslseopwpwooop
help ASAP due at 7:30 What explains a broken bone healing?
look at the photo
Answer:
1st one
Explanation:
DNA replace the old cells
NEED HELP ASAP!!!
The coordinated action of two types of myofilaments, actin and myosin, results in muscle contraction. The muscles contract as actin filaments slide over myosin filaments. When the muscle is in a relaxed state, the myosin heads are ready to bind with the actin filament. However, they are not able to bind due to
a.
the absence of ATP
b.
a high concentration of Ca++ ions
c.
blockage of the attachment site
d.
alcoholic fermentation
Answer:
I think due to absence of ATP but I'm not sure.. Actin and myosin return to their unbound state causing the muscle to relax. Alternatively relaxation (failure) will also occur when ATP is no longer available.
Myosin heads are ready to bind with the actin filament they are not able to bind due to the absence of ATP.
How two myofilaments involved in muscle contraction?Muscle contraction results from an intercommunication between the actin and myosin filaments which generate movement relative to one another.
What happens to the actin and myosin filaments when a muscle contracts?Myosin movement appear to be a kind of molecular hop. The myosin reaches forward, binds to actin, contracts, releases actin, and then reaches forward again to bind actin in a new cycle.
What happens to actin and myosin during muscle relaxation?Relaxation occurs when nerve stimulation stops. Calcium gets moved back into the sarcoplasmic reticulum shattering the link between actin and myosin. Actin and myosin then return to their unbound state causing the muscle to relax.
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What process takes place in plant and animal cells that involves chemical reactions with oxygen and releases stored energy? cell division meiosis cellular respiration photosynthesis
Answer:
cellular respiration
Explanation:
I did the test-
C. cellular respiration
Explanation: Becuase yes.
* I got the quiz*
What happens when the thin filament in a muscle fiber slides over the thick filaments?
Answer:
As the thin filaments slide inward, structures called Z-discs come toward each other and the sarcomere shortens but the lengths of thick and thin filaments do not change. The sliding of the filaments and shortening of the sarcomere cause shortening of the whole muscle fiber and ultimately the entire muscle.
Answer:
Sliding of the filaments and shortening
Explanation:
As the thin filaments slide inward, structures called Z-discs come toward each other and the sarcomere shortens but the lengths of thick and thin filaments do not change. The sliding of the filaments and shortening of the sarcomere cause shortening of the whole muscle fiber and ultimately the entire muscle.
PLS MARK BRAINLIEST
Question 1: Some cells produce and secrete high levels of digestive proteins. Which organelles would you expect to be abundant in those cells, and why? Question 2: Explain how active transport helps a nerve cell maintain its resting potential. Question 3: The Atlantic cod is a common fish of the Atlantic Ocean that must drink seawater to meet its water needs. Explain how active transport helps the Atlantic cod maintain homeostasis with regard to the balance of sodium and chlorine ions, which are abundant in seawater. ( Will Mark Brainliest). No Nonsense Answers.
Answer:
q1 : ribosomes because they are responsible for protein synthesis
q2 : by transporting potassium ions into the cell and sodium ions out of the cell maintaining a concentration gradient
q3 : seawater contains a high concentration of sodium and chlorine ions that the Atlantic cod gets rid of by actively transporting them out of its body
6. Alteration so that some of the proteins original properties are diminished or eliminated is:
a. Activation energy
b. Denatured
C. Catabolism
d. Anabolism
B, denaturing. Denaturing is the process in which proteins lose their native fold. The native fold is what gives each amino-acid sequence chain their function.
AIDS is the fifth and most severe phase of HIV infection
Answer:
HIV is the virus that causes Aids
last stage is Full blown stage
Which of these questions could BEST be answered with the methods of science?
a. How is Earth different from other planets?
b. What does it mean to be a good person?
c. Will computers make us more or less human?
Answer:
A
Explanation:
It is about planets and planets are in space.
11. A flower produces a seed. Explain why this is an example of sexual reproduction
Answer:
itrequires genetic material (DNA) from two parents. The parent plants have male and female sex cells, called gametes. ... Seeds produced through fertilization contain genetic material from both parents.
The production of a seed by a flower is an example of sexual reproduction because it involves the fusion of male and female gametes (pollen and ovules) to form a genetically diverse offspring.
Sexual reproduction is a type of reproductive process that involves the combination of genetic material from two parent organisms, resulting in the formation of genetically diverse offspring. In the case of a flower producing a seed, sexual reproduction occurs through a series of specialized reproductive structures and processes.
Male Gamete Production (Pollen): Flowers produce male gametes, or pollen, in structures called anthers. Pollen contains the male reproductive cells necessary for fertilization. When pollen is mature, it is released from the anthers.
Female Gamete Production (Ovules): Flowers also produce female gametes, or ovules, within the ovary. Each ovule contains an egg cell, which is the female reproductive cell. The ovary is located at the base of the flower.
Pollination: Pollination is the process by which pollen from the male reproductive structures (anthers) is transferred to the female reproductive structures (stigma) of the same or a different flower. This can occur through wind, water, insects, birds, or other means.
Fertilization: Once pollen lands on the stigma of a compatible flower, it forms a pollen tube that grows down into the ovary. This tube delivers the male gametes to the ovules, where fertilization occurs. Fertilization is the fusion of a male gamete with a female gamete to form a zygote, which develops into an embryo within the seed.
Seed Formation: After fertilization, the ovule develops into a seed, which contains the embryo, endosperm, and protective seed coat. The embryo carries genetic information from both parent plants, resulting in genetic diversity.
The combination of genetic material from male and female parent plants results in offspring with unique genetic characteristics. This genetic diversity is advantageous for the survival and adaptation of species to changing environments. Therefore, the production of a seed by a flower is a prime example of sexual reproduction, involving the fusion of gametes to create genetically diverse offspring with traits inherited from both parents.
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Immigration into an existing ecosystem will cause a population to increase if
the birth rate is greater than the death rate
the birth rate and death rate are balanced
the birth rate doubles and the death rate does not
the death rate is greater than the birth rate
Answer: A or C
Explanation: I just did it
The cactus wren bird
build its nests in the
cholla cactus to help
keep its babies away
from harm. This gids
the cactus wren but
does not harm the
cactus plant.
Which symbiotic relationship is described above?
Parasitism
Mutualism
Commensalism
Coevolution
Answer:
Commensalism
Explanation:
the wren bird is benefiting but the cactus not benefiting and it isn't being harmed at all
. How much time does it take a person to walk 12 km north at a velocity of 6.5 km/h
Answer:
It will take 1.85 hours to walk 12 km north.
Answer:
Explanation:
v=[tex]\frac{d}{t}[/tex]
and the d here is the distance which is equal 12 km
the time is still unknown
and we know the velocity which is 6.5 km/h
and according to the triangle of the velocity "search that up "
t =[tex]\frac{d}{v}[/tex]= [tex]\frac{12}{6.5}[/tex]≈1.8 hours
4. Which is an example of a chemical change?
A
Rust forming
C.
Candy bar melting
B.
Water boiling
D.
Pencil breaking
Answer:
A.
Explanation:
A. Rust forming
is a example of a chemical change
Hope this helped you!!
Answer:
RUST FORMING
Explanation:
because it takes the chemical h2o to form rust
I need help ASAP pleaseee :( also im in 5th grade btw
Answer:
Ok I will help you what is the problem
Explanation:
give two examples of how plants and animals affect their environment?
Answer:
Hey mate....
Explanation:
This is ur answer...
Talk about how plants and animals affect other things and give some examples e.g. squirrels bury acorns to save for winter annd some of them grow into oak trees, litter gets washes into storm drains into the ocean and affects wildife, spraying for mosquitoes kills honey bees that pollinate the flowers of apple trees etc...
Hope it helps!
Brainliest pls!
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20 Points!
Question:
Study the illustration. The small blue spheres represent water molecules.
In which direction will water molecules move across the membrane?
Water will move from A to B.
Water will move from B to A.
There will be no net movement of water.
Given the illustration shown in the image attached to this answer, water molecules will move from B to A.
Osmosis is defined as the movement of water molecules across a semi - permeable membrane from a region of higher concentration to a region of lower concentration. Osmosis usually occurs across the cell membrane.
The cell membrane is an example of a semi - permeable membrane. Hence, water moves from B where it is at a higher concentration to A where it is at a lower concentration according to the definition of osmosis.
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The use of drugs at a lower level in feeds than would be used to treat a sick animal is referred to as
A de-shelled egg is placed in tap water. The egg grows in size.
What is the best explanation for this change in size?
Ions in the water moved into the cell through diffusion because there were more ions outside the cell than inside the cell.
Water moved into the cell by osmosis because the solute concentration was higher inside the cell than outside the cell.
Water moved out of the cell by osmosis because the solute concentration was higher outside the cell than inside the cell.
Water moved into the cell by diffusion because there is more water inside the cell than outside the cell.
The best explanation for the change in the egg's size is that Water moved into the cell by osmosis because the solute concentration was higher inside the cell than outside the cell. Option B.
--------------------------------------------
When talking about solutions, 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.
Water is considered to be a hypotonic solution.
When a cell is in a hypotonic solution, through osmosis, water moves toward the cell.
Note: In this example, the egg is the cell.
Osmosis is the phenomenon that occurs when two dilutions of different concentrations -in this example, the interior of the cell and the solution- 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.
Water tends to go from the hypotonic solution to the cell interior and keeps doing so until concentrations are equal in the cell interior and exterior.
As water enters the cell, the cell begins to enlarge and becomes bigger-sized. And because cells can not limit the amount of water moving in, it keeps swelling until the membrane can not stretch anymore, and lysis occurs. It bursts.
What we need to consider is
When a cell with a semipermeable membrane is placed in a hypotonic solution, water enters the cell. When a cell with a semipermeable membrane is placed in an isotonic solution, there is no water movement. When a cell with a semipermeable membrane is placed in a hypertonic solution, water gets out of the cell.So, the best explanation for the change in the egg's size is Water moved into the cell by osmosis because the solute concentration was higher inside the cell than outside the cell. Option B.
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The answers are plz help
A: Lipid
B: protein
C: Glycolipid
D: Carbohydrate
Answer:
protein
Explanation:
Carrier proteins allow moves other materials within the organism.
This is the Bohr model for which element on the periodic table?
Answer:
The answer is Beryllium
How do bacteria get the proteins for the soil? (Protein food web thing)
Answer:
Nitrogen-fixing bacteria convert nitrogen gas from air into a form that plants can use to make proteins. Free-living nitrogen-fixing bacteria are also found in the soil. When they die the nitrogen they have fixed into their biomass is converted into ammonium. 2.
Explanation:
Which of the following statement is true about recombinant DNA
Answer:
It combines genes from two different organisms.
what differentiates amino acids from one another
Answer:
Every amino acid comprises a hydrogen atom, a carboxyl group, an alpha-amino group and also the R-group (which makes the side chain). The side chain present in every amino acid is different. Therefore, the only primary factor that makes each amino acid different is the presence of R-group.
Explanation:
Maybe this will help..
an object weighs 20n it displaces a volume of water that weighs 15n what is the buoyant force on the object
Answer:
sorry dont no what u say
so bye
How does increasing the temperature affect the random motion of molecules?
Answer:
Raising temperature increases energy, resulting in faster speed of molecules.
Explanation:
Increasing the temperature introduces more energy to the system, which will cause the random motion of molecules to increase in speed.
Hope this helps! :) Let me know if my answer doesn't make sense!
A car is driving 75 miles per hour down the interstate and sees a wreck in the distance. The car starts slowing down, but takes a while until it completely comes to a stop. If the acceleration was 98 miles/hr2, how long did it take for the car to decelerate?
Answer:
43
Explanation:
Because we need to multiply the product
How are phospholipids and DNA similr
Answer:
I think answer is liquid vesicles concentration was 0.3 mg/ ml
The cell membrane of an animal cell was damaged, preventing the cell from performing one of its functions. Which cell function would be lost, and how would this loss affect the cell?
Answer:
ok so
Explanation:
If the cell membrane of an animal cell is damaged, it would lose the ability to take in nutrients and excrete wastes. This would hinder the cell's capacity to create necessary materials and maintain proper functioning. Thus, the correct option is (b).
The correct response is option (b). The transport of chemicals into and out of the cell is regulated by the cell membrane, which acts as a selectively permeable barrier. Essential cell processes like food intake and waste elimination would be impeded if the membrane were to get disrupted.
This would impede the cell's capacity to produce required components through nutrient-dependent processes like metabolism. There would be a significant negative impact on the cell's general health and function, which could result in cellular malfunction, slowed growth, and ultimately cellular death.
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