A scientist is trying to determine the relationship between clams, snails, and squid. When she generates a molecular clock, she is surprised to see that clams and squid are more closely related than clams and snails. Which did the molecular clock data show?Clams and squid have been evolving separately for a longer time than clams and snails.

Clams and squid have been evolving separately for a shorter time than clams and snails.

Clams and snails have more in common genetically than clams and squid.

Clams and snails are more similar in related structures than clams and squids.

Answers

Answer 1

Answer: I think the last answer presents the truth reveled by the molecular clock. The statement is true, it claimed that clams and snails have stronger relationship than squids. The findings can be strengthened with the origin of their class. All of the said animals came from Phylum Mollusca which make these animals related, but stronger structural relationship can be identified with snails and squids because they are both in the Class Gastropoda. The squid came from Class Cephaloda which makes it more related with octopus and cuttlefishes.

Answer 2

Answer:

its the last option (Clams and snails are more similar in related structures than clams and squids.)

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: a pediatric fellow in your clinical practice group has identified a new clinical isolate of the gram-positive staphylococcus epidermidis that expresses a high level of an abc-type multidrug resistance (mdr) efflux pump. which of the following antibiotics would be the best choice for treating an infection caused by this bacterial strain? you may assume that the mdr efflux pump is its only resistance mechanism. all of the listed antibiotics would work well to treat ordinary staphylococcus epidermidis infections. choose one: a. rifampin b. tetracycline c. vancomycin d. sulfanilamide e. any of the antibiotics listed above would be effective choices. f. none of the antibiotics listed above would be effective choices.

Answers

None of the antibiotics indexed above could be a suitable pick for treating an infection due to the bacterial strain described.

The gram-positive staphylococcus epidermidis that expresses a excessive degree of an ABC-type multidrug resistance (MDR) efflux pump is probably resistant to all the antibiotics indexed.

Rifampin, tetracycline, vancomycin, and sulfanilamide are all probable to be ineffective in this case because of its MDR efflux pump, which permits it to pump out those antibiotics and decrease their effectiveness.

In general, the best option for treating an infection due to a bacterial pressure with an MDR efflux pump could be an antibiotic that is not affected by the pump. Some alternatives for treating MDR infections encompass polymyxins (including colistin), tigecycline, and Fosfomycin.

However, the unique antibiotic that might be the best option for treating an infection due to this bacterial pressure could rely on the specifics of the contamination, including the area of the contamination and the patient's typical health. It is crucial to work with a healthcare professional to decide the most suitable remedy for an infection with an MDR bacterial strain.

Read more about multidrug resistance at:

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1. Pick a food you are familiar with, and then answer the following questions about it. Use the Web to do research if you need to.a. How is the food produced? For example, if it's made from crops, explain what type of crop production is most likely used.

Answers

I am very familiar with rice, so I'm going to use that as the food to answer the questions. First, how is rice produced? Rice are grown mostly in plains, and differ in size and shape and the absorbent factor it has with water. After it is grown, it is plucked out and put into a granary to pull the skins off it. The type of crop production used is most likely the industrial kind because it is mostly the staple food in some countries.

Example of endocytosis????

Answers

Answer:

the leucocytes, neutrophils, and monocytes can engulf foreign substances like bacteria

Explanation:

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Answer:

Cholesterol is a much needed component in the cell that is present in the plasma membrane and is also used as a hormone precursor. A lipoprotein complex (such as LDL or low density lipoprotein) is then used to transport the cholesterol to other cells in the body. On the surface of the cell is a LDL receptor that binds the LDL complex to begin the endocytic process. These receptors were synthesized in the Endoplasmic Reticulum (ER) and were then transported and processed in the Golgi. Once the receptor is bound to the complex on the surface of the cell, clathrins are recruited along with other proteins that aid in the process. The receptors cluster together to form clathrin-coated pits. The coated pits are pinched off, forming endocytic vesicles, and are then uncoated. After uncoating, the vesicle is delivered to an endosome. The low pH in the endosome causes a conformational change that releases the LDL particles. These particles are then directed to the lysosome for degradation, releasing the cholesterol into the cell.

Some Glimses are taken from the internet

Which best defines homeostasis

Answers

Homeostasis refers to the mechanism of the body to maintain a stable internal environment instead of changes taking place in the external environment.

The balance that is attained is called dynamic equilibrium, which means as the changes occur body work to maintain a relatively uniform conditions.

The maintain that equilibrium body control temperature, blood pH, amount of blood in the glucose are ways of body to maintain homeostasis.

The tendency of a system,especially the physiological system of higher animal,to maintain internal stability, owning to the coordinated response of its parts to any situation or stimulus that would tend to disturb its normal condition or function.

Which combination of alleles best describes a sex-linked trait? A. heterozygous alleles
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C. alleles that are carried on X and Y chromosomes
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Answers

B. homozygous alleles

Each human body is composed of genes, and these usually come in pairs that are slightly different from each other. The different versions of genes are called alleles. Alleles are responsible for determining physical or notable characteristics and traits a specific person has.

Scientific experiments often produce new scientific knowledge.What usually happens if a scientific experiment generates new knowledge that doesn't agree with an existing theory?
A.
Scientists choose whichever side seems to have the most followers.
B.
Science is abandoned as a way to generate knowledge.
C.
The new knowledge is used to reevaluate the theory.
D.
The new knowledge is ignored in favor of the old theory.

Answers

C.
The new knowledge is used to reevaluate the theory.

When newer information is found on something, the theory is changed and updated based on the more reliable info.

Answer:

B: The new knowledge is used to reevaluate the theory.

Explanation:

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