Answer:
A virus surface proteins are organized to help penetrate host mucus.
Explanation:
The surface of viruses includes many copies of one type of protein that binds, or adsorbs, specifically to multiple copies of a receptor protein on a host cell.
The surface protein of influenza virus, hemagglutinin, helps the virus attach and enter host cells.
What are surface proteins?The surface protein on the influenza virus is called hemagglutinin (HA) and it plays a critical role in the virus' ability to infect host cells. HA is a glycoprotein that protrudes from the surface of the virus and binds to specific receptors on the surface of host cells, particularly in the respiratory tract.
This allows the virus to enter the host cell and hijack its machinery to replicate and produce more virus particles. The HA protein also enables the virus to evade the immune system by constantly changing its structure through a process called antigenic drift, which prevents recognition by the host's antibodies.
The importance of the HA protein makes it a prime target for the development of vaccines and antiviral drugs against influenza.
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CONSIDERAS QUE ES CORRECTO DECIR QUE LOS ANTIBIOTICOS SON MALOS PARA LAS BACTERIAS? Argumenta tu respuesta
Answer:
Sí, ya que su función es matarlas o impedir que aumente el número de estas.
Explanation:
Los antibióticos actúan sobre las bacterias ya sea matandolas o evitando que la población de un determinado tipo de bacterias se reproduzca haciendo que los mecanismos de defensas presentes en nuestro cuerpo puedan actuar sobre las bacterias ya existentes.
Los antibióticos pueden ser específicos para cierto tipo de bacterias o actuar de forma general afectando a varios tipos de bacterias presentes en nuestro organismo. Si se atacan bacterias que están normalmente en nuestro cuerpo por acción indiscriminada del antibiótico, nuestro organismo sufre un desequilibrio ya que las bacterias que tendrían que estar presentes para procesar ciertos elementos o realizar otras funciones no están.
HELP!!
What evidence do fossils provide geologists about the history of the Earth?
A. Living things have remained the same over time.
B. Environmental conditions have changed over time.
C. The amount of water on Earth has changed over time.
D. Environmental conditions have remained the same over time.
Edwin Chargaff was a 20th century biochemist who investigated the structure of DNA. Chargaff looked at the ratios of the four bases in the DNA. State the type of bond that joins the bases together in a DNA molecule
Answer:
Hydrogen Bond
Explanation:
The hydrogen bond joins bases together in a DNA molecules. Which is the bond between two strands on a DNA molecule. Although the hydrogen bond is weak, collectively in the DNA molecule, it is a strong bond which binds the molecule together.
which is most likely a covalent compound
a.) NaCl
b.) KCl
c.) CuF2
d.) CF4
Answer:
CF4
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Which method is the typical first step when scientists communicate their scientific results?
what is the phenomena of cells?
what is a condensed structure that contains the DNA that are visible during mitosis?
What component of blood is important in the treatment of the virus
Please help!!! I only need the first !!
Answer:
Inside this region of DNA are unique repeating patterns that can be used to differentiate one person from another.
Explanation:
DNA is a nucleic acid polymer. What are the monomers that build this polymer?
Which best describes sponges?
A. plants
B. simple invertebrates
C. fungi
D. fish
Answer:
answer is B I guess..........
A car with a mass of 2000 kg and a boat with a mass of 500 kg are both moving at the same speed.
What is the ratio of the kinetic energy of the car to the kinetic energy of the boat?
A. 2:1
B. 4:1
C. 9:1
D. 16:1
Answer:
B
Explanation:
Kinetic energy is possesed by a body by virtue of its motion. The ratio of the kinetic energy of the car to the boat is 4:1.
What is Kinetic energy?The term kinetic energy refers to the energy that is possesed by a body by virtue of its motion.
Now;
Kinetic energy of the car = 0.5 * 2000 * v^2
Kinetic energy of the boat = 0.5 * 500 * v^2
The ratio of the kinetic energy of the car to that of te boat is; 0.5 * 2000 * v^2/0.5 * 500 * v^2 = 4:1
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Which of the following is true about geographic barriers?
1Geographic barriers only involve mountains
2Geographic barriers can not separate organisms
3Geographic barriers separate all species
4Geographic barriers separate some organisms and not others
Answer:
I believe A makes the most sense
Explanation:
What is the name for winds that usually blow in the same direction?
Dry winds
Prevailing winds
Smart winds
Strong winds
Answer: (B) Prevailing winds
Explanation: the name for winds that usually blow in the same direction is Prevailing winds
The name for winds that usually blow in the same direction is "Prevailing winds". Therefore, option (B) is correct.
What is prevailing winds?Prevailing winds are the dominant winds that blow consistently over a region, resulting from the combined effects of global atmospheric circulation patterns, the Coriolis effect, and local geography. These winds typically blow from the same direction and have a significant impact on regional climate, as they can bring in moisture, temperature changes, and other weather conditions.
Prevailing winds can be important for agriculture, transportation, and other human activities that are affected by weather patterns. Therefore, option B, prevailing winds, is the correct answer
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evolution of octopus
What is one of the main ways that evolution occurs in prokaryotes?
A. Crossing over during DNA replication
B. Exposure to pathogens that change DNA
C. Mutations that occur during binary fission
D. Exchanging DNA during alternation of generations
E. Decomposing dead organisms
Answer:
answer:
the.answer.is.b
B B B
One of the main ways that evolution occurs in prokaryotes is through mutations that occur during binary fission, which is present in Option C. In prokaryotes, which are single-celled organisms that lack a nucleus, evolution occurs primarily through mutations that occur during binary fission.
What is mutation?Prokaryotes, which include bacteria and archaea, are unicellular organisms that lack a nucleus and other membrane-bound organelles. They are known for their remarkable adaptability and ability to evolve rapidly in response to changing environmental conditions, and beneficial mutations that improve an organism's fitness, such as antibiotic resistance, can quickly spread through a population through natural selection.
Hence, one of the main ways that evolution occurs in prokaryotes is through mutations that occur during binary fission, which is present in Option C.
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Which of the following sentences BEST explains what happens when puddles evaporate?
A. The water absorbs into the ground.
B. The particles of matter move more slowly.
C. The water changes from one form to another.
D. The particles of matter move closer together.
Help
Answer: The correct option is C.
The water changes from one form to another.
Explanation:
This is evaporation is the process water changes from liquid to gas.
Evaporation normally occur in the presence of heat which could be from sun. When puddles are heated, the water present shrink and the water evaporates and changes into vapor or gas. The water changes into gas or gaseous vapor.
A mutation in the code for a trait may not always change the expression of that trait. What advantage does this provide cells?
1)Ribosomes can produce proteins more quickly.
2)Cells only need to make a limited number of proteins.
3)Proteins can switch tasks without a change in the DNA sequence.
4)Some changes in the DNA sequence will produce the same proteins.
Answer:
ribosomes can produce proteins more quickly
2. How are the differences in animal cells related to their functions?
3. How are cells organized within an animal?
I will give extra points!!
How does matter change from one state to another?
Matter changes state when energy is added or taken away. When matter is heated enough, the molecules move faster and with greater energy. ... If enough heat is added, a solid can become liquid and a liquid can become gas.
This is your main source of energy; it can be simple or complex.
Answer:
the main source of energy is the sun
Sedimentary rocks form from rock and mineral fragments, and metamorphic rocks form from existing rock.
True
Or False
Answer:
True
Explanation:
Sedimentary - A rock formed as a result of the weathering process, either by compaction and cementation of rock mineral fragments, or the precipitation of dissolved minerals.
Metamorphic - These rocks form as existing rocks are subjected to intense heat and/or pressure, usually over long periods of time.
What happens to water when light is absorbed?
A. it bonds with carbon dioxide and forms carbonic acid
B. it bonds with oxygen and form H2O2
C. it splits and oxygen is given off, while H+ builds up in the thylakoid space
D. it heats up and therefore provides the activation energy needed to start photosynthesis
tRNA molecules are recyclable
1.True
2.False
Evolution is a process of change over time. A leading theory explaining why things evolve is: *
A. Inbreeding
B. Natural Selection
C. Kin Selection
D. Natural Ingredients
Match the feature with its description.
HELP!! ASAP
Answer:
In order:
Stalactities
Stalagmites
Swallowhole
Sinkhole
The correct match of the features are:
Stalactites: Grow toward the cave floor.
Stalagmites: Grow toward the cave ceiling.
Swallow hole: A cave that has collapsed because of gravity.
Sinkhole: Where a stream disappears into the ground.
What are Stalactites?Mineral deposits known as stalagmites and stalactites are frequently seen in caves. The pointy, downward-pointing minerals that fall from the caves' roofs give rise to the stalactites.
On the other hand, stalagmites are created when minerals that fall from the roof are deposited on the ground afterward.
Therefore, the correct options are:
Stalactites: Grow toward the cave floor.Stalagmites: Grow toward the cave ceiling.Swallow hole: A cave that has collapsed because of gravity.Sinkhole: Where a stream disappears into the ground.To learn more about Stalactites, refer to the link:
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why is blood bright red
Answer:
Human blood is red because hemoglobin, which is carried in the blood and acts as an oxygen transport agent, is iron-rich and red in colour.
Need help in the hypothesis part!
what is the molar mass of Br2 in grams
Answer:
159.808 g/mol
Explanation:
Br itself is 79.904 g/mol. So multiply it by two.
The molar mass of [tex]Br_{2}[/tex] is approximately 159.808 grams per mole.
When calculating the molar mass of [tex]Br_{2}[/tex], also known as diatomic bromine, the atomic masses of the two bromine atoms (Br) found in the molecule are added together.
Bromine (Br) has a mass of roughly 79.904 grammes per mole according to its atomic weight.
Because of this, the molar mass of [tex]Br_{2}[/tex] is calculated as follows: 2 times 79.904 g/mol = 159.808 g/mol
As a result, the amount of grammes that constitute one mole of [tex]Br_{2}[/tex] is roughly 159.808.
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Here some yummy anime wafius if you're hungry
Answer:
animes b! tches
Explanation:
whats yoir fav anime
Answer:
No the reason foe this is because I dont like people
Explanation:
hi