In _______, with the help of Rosalind Franklin, ____________ discovered the structure of DNA.
A. 1915, Watson and Crick
B. 1953, Watson and Chargaff
C. 1953, Watson and Crick
D. 1951, Chargaff

Answer:

Rubella

Explanation:

Rubella is an infectious disease caused by a virus referred to as rubivirus, which can be spread from pregnant women to their unborn children through the bloodstream. During the first trimester of pregnancy, rubella can cause the death of the developing fetus (i.e., miscarriage) or serious birth defects such as, for example, heart defects, cataracts, deafness, mental incapacities, etc. Rubella symptoms include, among others, rash, joint pain, swollen lymph glands (especially behind the ears), headache, and mild fever.

Answer:

polarity results from uneven partial charge distribution between atoms in a compound

Explanation:

electrons in a polar covalant bond are unequally shared between the two bonded atoms which results in partial positive and negative charges.the separation create a dipole.

Answer and Explanation:

A. The risk factors for this patient are age, family history, and smoking and alcoholism. That's because, most cases of esophageal cancer are detected at age 55 years. We must not forget that cancer is a disease with great genetic potential, which means that, as the father and brother of this patient had this type of cancer, this patient has a high probability of developing the same cancer. Furthermore, the constant consumption of cigarettes doubles the risk of developing esophageal cancer. This risk is also increased by alcoholism.

B. To calm the patient down, I would say that there is a very small and almost non-existent risk that he will choke or even feel the endoscopy insertion, as the entire procedure is done with the patient anesthetized and sedated.

A) Risk factors include

B) Calming the patients fears

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Answer:

300%

Explanation:

The mass of the bacterial culture is triples everyday, meaning that after one day the culture will have 300% of the mass as the culture one day prior.

Answer:

It mututates

Explanation:

It changes it form thus becomes resistant to phagocytes

Answer:

Cellular respiration does not affect the carbon cycle but is part of the carbon cycle. The 2 carbon cycles. carbon ( C ) is taken up by the plants and trees in the form of carbon dioxide ( CO2 ). Plants converts this CO2 into organic compounds such as glucose ( C6H12O6 ).

Explanation:

Increase in aerobic respiration will lead to increase in the amount of CO2 released into to the atmosphere due to respiration.

Aerobic respiration occurs when oxygen is combined with glucose to yield carbon dioxide and water. This is one of the major ways through which carbon dioxide enters the carbon cycle.

Note that the carbon cycle shows the movement of carbon in nature. Increase in aerobic respiration means that more carbon will be introduced into the atmosphere as carbon dioxide.

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Answer: Epithelial stomach cell, stomach lining tissue, stomach and then the whole digestive system.

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Answer:

Glucose mobilization would continue

Explanation:

The GTP-bound alpha subunit (Gαs) is a subunit of the heterotrimeric G protein which is required for stimulating the cAMP-dependent pathway through the activation of the membrane-associated enzyme adenylyl cyclase, which in turn catalyzes the synthesis of the second messenger cyclic-3′,5′-adenosine monophosphate (cAMP) from ATP. Moreover, cAMP phosphodiesterase is an enzyme that hydrolyzes cAMP, thereby negatively regulating the levels of this second messenger, which is fundamental for the termination of the signal. In this case, the epinephrine signal initiates glycogen breakdown (glucose mobilization) in muscle cells. In consequence, if the cAMP phosphodiesterase enzyme is inhibited, the concentration of cAMP will persist high even beyond the termination of the signal, thereby glucose mobilization would continue.

Answer:

b.

It depends upon the length of the fatty acids involved

Answer:

True

Explanation:

Nitrogen is a fundamental component of both inorganic and organic compounds, where it is the main constituent of biomolecules such as nucleic acids (DNA, RNA) and proteins. The nitrogen cycle refers to the biogeochemical processes by which nitrogen circulates between the components of an ecosystem, i.e., between organisms (like plants and decomposers), and non-living things (i.e., soil, water, air). This cycle consists of several processes which include, among others, nitrogen fixation (i.e., the process by which nitrogen in the atmosphere is converted into ammonia), nitrification (i.e., the oxidation of ammonia is oxidized into nitrite and subsequent transformation of nitrites into nitrates), denitrification (where nitrate is reduced), anaerobic ammonia oxidation and putrefaction.

Answer:

B. Theoretical

D. Quantitative

Explanation:Because she is not very sure of the answer but is aware of her solution

Answer:

Explanation:

Due to technical problems, you will find the complete explanation in the attached files.

Answer:

The lower limit is 0.65°C

The upper limit is 1.05°C

the average is 0.85°C

The difference between the average and the lower limit is:

0.85°C - 0.65°C = 0.20°C

the difference between th average and the upper limit is:

0.85°C - 1.05°C = -0.20°C

Then we can write the change in temperature as:

T = 0.85°C ± 0.20°C

Now we want to find the error bar.

The error bar would be the total distance between the lowest value and the largest value.

Then the error bar is:

1.05°C - 0.65°C = 0.40°C

notice that the error bar is twice the error, which makes a lot of sense because the error (± 0.20°C) goes up and down.

Then the error bar in this measure has a magnitude of 0.40°C.

Answer:

rate of population growth

Answer:

Water Vapor

Explanation:

The most abundant greenhouse gas overall, water vapor differs from other greenhouse gases in that changes in its atmospheric concentrations are linked not to human activities directly, but rather to the warming that results from the other greenhouse gases we emit. Warmer air holds more water.

: Meiosis is sometimes called "reduction division" because it reduces the number of chromosomes to half the normal number so that, when fusion of sperm and egg occurs, baby will have the correct number. Therefore the purpose of meiosis is to produce gametes, the sperm and eggs, with half of the genetic complement of the parent cells.

Answer:

1) The purpose of mitosis is growth and repair of cells

Explanation:

Prophase:

-DNA condenses (supercoiled, chromatids are visible under light microscope);

-Nuclear membrane begins to disintegrate (by the end of prophase  it is completely gone)

-Centrioles move to opposite ends of the cell

-Splinde fibers start to form from the centrioles and grow

Metaphase:

-Spindle fibers, departing from both poles, are attached to each centromere, on opposite sides

-The spindle fibers pull the chromosomes back and forth until they align in a plane along the equator of the cell, which is called the equatorial plane

Anaphase:

-The spindle fibers shorten

-The centromeres of sister chromatids split

-Chromatids move apart, pulled by the spindle fibers

-Chromatids become chromosomes

-Half of the chromosomes move to one cell pole, half to the other

Telophase:

-The chromosomes reach the cell pole

-Nuclear membrane reforms

-Spindle fibers break down and disappear

-The chromosomes begin to uncoil, which makes them diffuse and less compact

Cytokinesis:

-The cell membrane pinches inward until the cell divides in two;

-There are two daughter cells with the same structures and number of chromosomes as the parent cell

-Chromosomes decondense

Answer:

2KNO3

Explanation:

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From the equation of reaction, the other product during the replacement reaction of silver nitrate and potassium sulfate is potassium nitrate, KNO₃.

In the replacement reaction of silver nitrate and potassium sulfate, the products are silver sulfate and potassium nitrate.

Silver sulfate is insoluble and comes out of solution as a precipitate.

The equation of the reaction is given below:

Therefore, the other product during the replacement reaction of silver nitrate and potassium sulfate is potassium nitrate, KNO₃.

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Answer:

(A) The skeletal structure of the gorilla and chimpanzee suggest a common evolutionary ancestry.

Explanation:

The vertebrate and many of the other parts of the skeletal structure of the gorilla and chimpanzee are alike. (and, by using a little background knowledge, you can figure this out by thinking; if humans share 98% of DNA with chimpanzees and about 96% of DNA with gorillas, then the two animals must share a lot of DNA as well.)

I hope this helps !!!

Answer:

1, 3, 4

Explanation:

The gorilla and the chimpanzee have very similar anatomy, so they are closely related.

There is a small resemblance between the dog and the frog, but nowhere close to the one shared with the gorilla and chimpanzee, so NO

the dog IS more closely related to the frog than the chimpanzee since it looks more similar

yes, all of them are vertebrates and therefore share a single vertebrate ancestor

Biomagnification refers to the presence of higher concentration of chemical toxins as a result of the accumulation of toxins in organisms.

Biomagnification is best explained as a condition in which the chemical concentration of a toxin is amplified in an organism compared to the environment in which the organism is found.

Biomagnification usually is observed as one goes higher in the trophic levels of organisms.

For example, chemical pollutant found in water may be present at tolerable levels. However, in organisms, living in the water, the concentration of the pollutant is higher as these organisms accumulate these toxins in their tissues.

Therefore, biomagnification refers to the accumulation of toxins in organisms higher than found in their environment.

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Answer:

Organisms in the deep sea acquire energy directly from the sun.

Answer:

Data that is not directly collected or observed by the scientist

It means that the data that was collected by someone else that is not the scientist, it may include censuses, surveys, data bases or other sort of information.

Explanation:

Answer:

They maintain their body temperature higher than their environment by some metabolic processes like contraction of muscles, friction produced by flow of blood etc. They have a higher basal metabolic rate, and also a greater capacity to increase their metabolic rate.

Answer:

The organisms that harness non-biological energy and convert it to biologically relevant/useful energy are called __autotrophos or producers_. The organisms that consume these are called _herbivores_ (it should end in -ores) which occur at the __second_ trophic level. The number of trophic levels that any ecological system will primarily dependent on the _consumer_ organisms.

Explanation:

 In the trophic web occurs energy transference through organisms occupying different levels in the chain. Each level feeds on the preceding one and becomes food for the next one. The first link is occupied by autotroph organisms, which are the producer. The following links are the consumers: herbivores are primary consumers and feed on producers. Carnivores are secondary consumers and feed on herbivores, and so on. The last links are the decomposers, microorganisms that act on dead animals degrading organic matter.  

Every link has an effect on the superior links and the immediately anterior link, meaning that whenever one of the links changes, the other ones will be affected.  

Autotrophs or producers synthesize inorganic substances, such as light, and turn them into organic matter according to their own needs. These organisms are photoautotrophs, such as plants, or chemoautotrophs. They occur at the first trophic level.

Heterotrophs are those incapable of producing their own organic matter, so they feed on producers, depending on them to get proteins and energy. In the trophic chain, heterotrophic organisms occupy the first, second, or third consumer level, after producers. These animals can be herbivorous, carnivorous,  omnivorous, hematophagous, ichthyophagous, and etcetera. All of them depend on autotrophic organisms.

In the particular case of herbivores, they occur at the second throphic level feeding on producers and being eaten by carnivores.

In general, most trophic chains are composed of 4 or 5 levels, depending on the number of consumers present, and the energy transference between levels.

Answer:

True

Explanation:

In plants, hormones travel large throughout the body via the vascular tissue (xylem and phloem) and cell-to-cell via plasmodesmata. In contrast, many animal hormones are produced only in specific glands. Plants do not have specialized hormone-producing glands.

Answer:

Density

Explanation:

Density is refer to how much space an object in Mass take in volume.

It is mass if an object divided by volume.

It usually in g/cm3

Answer:

The kinetic energy of the water molecules decreases which causes the liquid in the thermometers to drop.

Explanation:

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Answer:

D I guess because grinding optical glass and for polishing metals and has also been made into sandpapers and grinding wheels.

Answer:

It's to make emery boards

Explanation:

I just took the test