The evolution of similar insulating skin coverings such as fur, hair, and feathers in mammals and birds is a result of _____.

A) shared ancestry
B) convergent evolution
C) homology
D) evolutionary divergence

The answer is virus it is considered to be alive

Answer:

Initiating the replication of genetic material

Explanation:

This is the function of the primer and polymerase enzyme. The plasma membrane is the outermost boundary of the cell. It is selectively allows material in and out of the cell. It has channels through which these materials pass through. If these materials are too large, they are taken in and out through endocytosis and exocytosis respectively.  

Answer:

B

Explanation:

Decomposers such as Cellulomonas bacteria convert the nitrogen in the dead matter into ammonia while Nitrosomonas bacteria convert the ammonia into nitrites that are absorbed by plants as nutrients. In addition, nitrobacters convert the nitrites to nitrates also absorbed by plants.

option c-to test for liberation of o2 in light

The correct answer is: f(A2) = 0.0300 f(A1) = 0.9997

If 9 in 10,000 newborn babies have the disease, that means that the frequency of recessive homozygous is 9/10000=0.0009.

According to Hardy-Weinberg equilibrium p2+2pq+q2=1 (p+q=1) where p2 is frequency of dominant homozygous (only p is dominant allele), 2pq is frequency of heterozygous and q2 is the frequency of recessive homozygous (only q is the frequency of recessive allele). This means that q2=0.0009 and (A2) q=0.03. p (A1)=1-0.03=0.97  

I’m not 100% sure but I believe it’s breads since it’s the only food group

Answer:

OLIVE OIL

Explanation:

The cell in prophase I of meiosis has four times as much DNA as each daughter cell following cytokinesis of meiosis II, due to the halving of DNA content during meiosis.

A cell in prophase I of meiosis has four times as much DNA as each of the daughter cells following cytokinesis of meiosis II. This is because during prophase I, the cell has undergone DNA replication and thus has double the amount of DNA. After cytokinesis of meiosis II, we have four daughter cells, each having half the amount of DNA as the cell in prophase I. Think of it this way, during meiosis I and II, the DNA content is successively halved in each daughter cell. Hence, in comparison to the cell in prophase I, each of the four daughter cells at the end of meiosis II has a quarter of the DNA.

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Our sense of hearing is developing in the womb and is already quite acute in the third trimester of pregnancy.

When neurons are not producing electrical signals we say that they are at resting phase: voltage across their membrane is called the resting membrane potential, or the resting potential.

This potential is determined by the concentration of ions (Na, K) across the membrane and by membrane permeability to each type of ion. While the ions move through channels down their gradients they lead to a separation of charge and that is what creates the resting potential.

The membrane of the neuron is much more permeable for K ions so the resting potential is close to the equilibrium potential of K+.

The correct answer is: The addition of a 7-mG cap at the 5' end of the transcript and the addition of a poly-A sequence at the 3' end of the message

These posttranscriptional processes are called:

• 5’ capping - It protects the mRNA from 5' degradation by exonucleases. Cap is also involved in ribosomal binding.

• Polyadenilation or addition of poly(A) tail – It also protects mRNA from degradation of 3’exonucleases.  A long poly(A) tail can also increase translation.

Hello there!

Your answer would be lung cancer, chronic bronchitis, emphysema and asthma.

Years of smoking and exposure to air pollutants can contribute to the incidence of lung cancer, chronic bronchitis, emphysema and asthma.

Lung cancer is one of the factors that is caused by smoking and air pollutants. This happens when too much lung cells are being produced in the lungs at once, which causes cancer cells to grow, this would form a tumor in the lung. There are many treatments that could be taken to remove this tumor. This is one of the things that are caused by smoking and air pollutants.

Chronic Bronchitis is another factor that is caused by smoking and air pollutants. This also involves the lungs. Chronic Bronchitis is a disease in the lungs that caused inflammation in them, which is very dangerous to the human body. Growth of mucus, coughing, and etc are symptoms of this. This is another factor that is caused by smoking and air pollutants.

Emphysema is another factor that is caused by smoking and air pollutants. This is a disease that causes the alveoli (a balloon shaped pass way in the raspatory system) to over swell. This mostly causes a shortness of breath to a person. This is another factor that is caused by smoking and air pollutants.

Asthma is another factor that is caused by smoking and air pollutants. This condition is very common to people who have smoked, been around smoke, or has been around places whose air is very polluted. This conditions causes the airways to clog up, which makes it hard to breathe. This is another factor that is caused by smoking and air pollutants.

c, variation is the answer

Head of the bed elevated 30 to 45 degrees with the neck in neutral alignment

heart, arteries, and veins

Hey, it’s Nutrients and Oxygen

Cuts are injuries to the skin and underlying soft tissue, often caused by sharp objects, which can lead to infections if pathogens enter the body through the break in the skin.

Cuts are injuries to the skin and the soft tissue underneath it. Because the skin is the part that meets the world most directly, it is highly susceptible to injury. Common causes of skin injuries can be sharp objects, heat, or excessive pressure or friction. When the skin breaks from a cut, such as a paper cut, it allows a pathway for pathogens to enter the body. If untreated, this can lead to an infection, with the innate immune system responding to fight off the invading bacteria.

More severe skin damage can occur below its surface, in the subcutaneous layer known as the hypodermis, where infections like cellulitis can develop, causing redness and painful inflammation.

It is the Lake Travis watershed and it has 209 wells.

C: disruptive selection

Medium-colored mice would not blend in with either the grass or the sand because of the Disruptive selection.

Disruptive selection may be defined as a type of selection in which individuals of the intermediate phenotype are less fit than those of both higher and lower phenotypes. Due to this, the extremes are favored.

In the question, light-colored mice blend in with the sand, as they get an advantage from light-colored sand while dark-colored mice can hide in the grass and are capable to survive in the ecosystem.

But the medium or intermediate-colored mice would not blend in with either the grass or the sand. As a result of this, they are less fit for surviving in the same condition.

Therefore, medium-colored mice would not blend in with either the grass or the sand because of the Disruptive selection.

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your answer is true hope this helps

I think true is the correct answer. Hope this helps

Final answer:

Cutting both the jellyfish glo gene and the pUC18 plasmid with EcoRI would create compatible sticky ends that could be ligated together, allowing jellyfish DNA to be integrated into the plasmid and potentially expressed in E. coli.

Explanation:

If both the jellyfish glo gene and the pUC18 plasmid are cut with the EcoRI restriction enzyme, both DNA samples would have sticky ends. These ends can anneal due to their complementary base sequences, which are specific to the EcoRI cutting pattern. When mixed with DNA ligase, the enzyme responsible for joining DNA fragments, a small number of the jellyfish DNA fragments would integrate into the pUC18 plasmid, creating a recombinant DNA plasmid. This plasmid could then be used to transform E. coli, potentially expressing the traits encoded by the inserted jellyfish DNA, such as bioluminescence if the glo gene is expressed.

Answer:

The correct answer is "Mechanized plows allow larger areas to be farmed by a single farmer."

Explanation:

Mechanized plows allow large areas of land to be plowed quickly. A further benefit is that mechanized plows do not fatigue as people and animals do. Because of this, mechanized plows help contribute to the increasing size of modern farms.

Answer:

Mechanized plows allow larger areas to be farmed by a single farmer.

Explanation:

i did it and got it wright

The lengths of the legs of a right triangle is 4.9 units, 15.8 units and one acute angle measures 19° and the hypotenuse is 15 units long.

The answer is C. 4.9 units, 15.8 units

Hope this helps :)

Answer:

Option D, [tex]4.9[/tex] units

[tex]14.2[/tex] units

Explanation:

In a right angled triangle one angle is [tex]90[/tex]° while the sum of other two angle is [tex]90[/tex]°

Now if we go by the geometrical concepts

[tex]Sin (19) = \frac{base}{hypotenuse} \\[/tex]

Base length of the triangle is equal to

[tex]15 * sin 19\\= 4.9[/tex] units

As per the rule of Pythagorean theorem -

[tex](Hypotenuse)^2 = (Base length)^2 + ( Vertical side length)^2\\[/tex]

Substituting the values in above equation, we get -

[tex](15)^ 2 = (4.9)^2 + X^2\\X = \sqrt{(15)^2 - (4.9)^2} \\X = \sqrt{200.99} \\X = 14.2[/tex] units

The correct answer is: The cascade serves to amplify the signal, so one activated receptor can have a significant response

The signal transduction process is represented by series of molecular events that end up with cellular response (change of behavior or characteristic).  

Component of a signaling pathway (based on their role) are:

• Ligands or first messengers

• receptors or the signal transducers

• primary effectors

• second messengers

• secondary effectors…

Signal transduction is part of almost all type of processes in the cell such as cell growth control, proliferation, metabolism etc.

The signaling cascade serves to amplify the signal and impacts multiple downstream components, allowing one activated receptor to stimulate a significant cellular response. The phosphorylation of proteins contributes to shaping this response. The termination of signal response, notably through de phosphorylation is vital to control cell behavior.

During the process of signal transduction, a signaling pathway or cascade is often initiated upon the binding of a ligand to a cell-surface receptor. This chain of events facilitates interactions among second messengers, enzymes, and activated proteins, triggering a response in the cell's environment. A significant part of this cascade is the phosphorylation of molecules by enzymes known as kinases, which alter the shape of proteins and hence, their activity.

Activation of an intracellular component of the receptor often amplifies the signal, with a single activated receptor influencing multiple downstream components of the signaling pathway. The cascading mechanism serves to significantly amplify the signal, allowing one activated receptor to have a prolific cellular response. This amplification is beneficial in cases where the hormonal signal is of a very low concentration.

The effect of cell signaling can be terminated through the degradation of signaling molecules or de phosphorylation of phosphorylated intermediates in the pathway. This termination is essential to ensure the appropriateness of signal response.

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d. a neuron recharges before it can fire again.

The refractory period is a time after an action potential when it is difficult or impossible for another to be fired due to the need for the neuron to return to its resting state.The correct option is d.

The refractory period refers to the time interval after an action potential in which a neuron or muscle cell cannot regenerate another action potential. This period is vital for the neuron to return to its resting potential. During the absolute refractory period, no additional action potentials can be initiated regardless of the stimulus because the voltage-gated sodium channels are either open or in an inactivated state. During the relative refractory period, a neuron can in principle fire again, but only by a much stronger stimulus, due to the movement of potassium ions out of the cell which causes hyperpolarization.

➷ The correct option would be a chloroplast. A chloroplast. A chloroplast allows light to be taken in to carry out photosynthesis and then form all necessary products.

➶ Hope This Helps You!

➶ Good Luck (:

➶ Have A Great Day ^-^

↬ ʜᴀɴɴᴀʜ ♡

Answer:

A chloroplast

Explanation:

Chloroplasts are the cell organelles in which photosynthesis reactions occur, which use light energy to produce organic molecules. These important structures are found in green algae and plants. Chloroplasts are very important organelles for the functioning of the plant organism, through which plants play an important role in the carbon cycle, producing carbohydrates as they allow plants to produce carbohydrates from carbon dioxide and water.

The correct answer is: sodium gradient

It is very important for glucose to be transported into proximal tubule cells (reabsorbed) because that is the way to prevent it from disappearing from the body through the urine.

Glucose is co-transported with sodium ions into the proximal tubule via the SGLT2 cotransporter. This cotransporter is an example of secondary transport because it uses the energy from downhill sodium ion gradient created by the ATPase pump to transport glucose.

The primary driving force for glucose transport into proximal tubule cells is secondary active transport, involving a Na+/glucose symporter that uses the Na+ gradient created by Na+/[tex]K^+[/tex] ATPase to transport glucose against its gradient.

The primary driving force for glucose transport into proximal tubule cells of the kidneys is secondary active transport. This process utilizes a Na+/glucose symporter, which co-transports sodium ions and glucose molecules across the apical membrane of the proximal tubule cells. The energy for this process comes from the sodium ion gradient established by the Na+/[tex]K^+[/tex] ATPase pump, which maintains a low intra-cellular sodium concentration by actively pumping sodium out of the cell.

Secondary active transport is so named because it relies on the primary active transport mechanism of the ATPase pump to create the sodium gradient necessary for the symporter function. The SGLT proteins use the energy released as sodium moves down its electrochemical gradient to transport glucose against its own gradient into the cell. Once inside, glucose exits the cell into the bloodstream via the basolateral membrane through GLUT transporters, by the process of facilitated diffusion.

It was actually on March 14, 1926 in Auburn, Massachusetts that D. Robert Goddard launched his first liquid fueled rocket successfully.

Goddard’s rockets made little impression on government officials. Only through modest subsidies from the Smithsonian Institution and the Daniel Guggenheim Foundation, as well as the leaves of absence granted him by the Worcester Polytechnic Institute of Clark University, was Goddard able to sustain his lifetime of devoted research and testing.

Air;Fluid pressure waves Hope it help

False; Organisms involved in a mutualism cannot survive without their partner.

Answer:

The correct answer is "Organisms involved in a mutualism cannot survive without their partner".

Explanation:

It is false that organisms involved in a mutualism cannot survive without their partner. A mutualism is defined as a relationship in biology and sociology where both individuals are benefited from it. Most mutualism relationships are facultative, which means that the organisms do not depend its survival from the relationship. For instance, the mutualism relationship between corals and symbiotic algae help both organisms to obtain nutrients, however corals and symbiotic algae can survive for themselves.

earthquakes produce both body and surface waves which is the fast sesmic wave!!

hope this helps!!