what's the answer please ​

Answer:

Nuclear reactions involve a change in an atom's nucleus, usually producing a different element

Explanation:

Chemical reactions, on the other hand, involve only a rearrangement of electrons and do not involve changes in the nuclei. Different isotopes of an element normally behave similarly in chemical reactions.

Answer/Explanation:

1. Both because RNA and DNA consist of Adenine, Uracil, Guanine, Cytosine, and Thymine which are all nucleic acids

2. R. RNA is usually single stranded while DNA is double stranded getting the name the "double helix"

3. D. DNA can usually be found in the nucleus of a cell but can sometimes be found in the mitochondrion of that cell which is outside of the nucleus

4. D. DNA got the name double helix because of its ladder like shape. The shape of DNA looks like ladders curling around a pole

5. Both. This is because both RNA and DNA consists of these nucleic acids but the acids that make then unique are the uracil in RNA and the thymine in DNA

6. Both. This is because all nucleotides consist of a phosphate, sugar, and a base. Thats what makes up a nucleotide

7. R. As it was said earlier, RNA has the same nucleic acids as DNA except uracil. DNA has thymine instead of uracil

8. D. DNA has thymine instead of uracil

9. Both. Both DNA and RNA are usually in the nucleus doing their jobs to help us function

10.D. DNA has sugar deoxyribose while RNA has sugar ribose.

11. Both. Both DNA and RNA are made up with nucleotides like thymine, uracil, adenine, and more

12. R. Only RNA has sugar ribose since DNA has sugar deoxyribose

Answer:

"bark" (and any subsequent words) was ignored because we limit queries to 32 words

Explanation:

-_-

Answer:

Energy flow in ecosystem is SOLAR ENERGY.

Answer:

First, you breathe in oxygen through your trachea. The air travels down through the trachea to your lungs. Then your lungs transport the oxygen through your pulmonary artery to your heart. Then the heart transports the oxidized blood throughout your body. Then once the blood gives away all the oxygen your veins take the filtered blood through your pulmonary vein and back to your lungs to get oxidized again. I hope this helps

Explanation:

Answer:

No

Explanation:

A theory cannot be made by one person, no matter how many times they repeat the experiment. Therefore, you repeating the experinment does not make it a theory. The experinment must be repeated by others and get same result as you to confirm it as theory.

Explanation:

Blood is pumped from the left ventricle of the heart through the aorta and arterial branches to the arterioles and through capillaries, where it reaches an equilibrium with the tissue fluid, and then drains through the venules into the veins and returns, via the venae cavae, to the right atrium of the heart

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The U.S. is a leader in agriculture and food globally. In the last 150 years, technologies and innovations in the production, transportation, and retailing of food have developed economic growth at home and provided affordable food to the of people of the world.

Globalization has developed agricultural production and resulted it in growing much faster compared to the ones in the past.

Before the fast growth was around over 3 percent per year. Now at this time, it is 4 to 6 percent.

However, these increased rates of growth involve a particular change in its composition.

Thus, it can be concluded that globalization helped billions of people to overcome extreme poverty and improved their lives.

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Answer:

It is also important to remember that the seasons in South America are the reverse of that in the Northern Hemisphere, meaning that summer falls between December and February and winter between June and August.

The further north you are on the continent, the closer you are to the Equator (the country, of course, but also the Equator line). The temperature variations between the different months of the year are therefore smaller and smaller as you go up. In other words, each seasons of South America depends on its country.

Answer:

Antibiotics is no a pathogen

Answer:Key stone

Explanation:

Keystone species hold together the complex web of relationships in an ecosystem. They can be animals, plants or microorganisms. Examples of keystone species include starfish, sea otters, wolves and elephants.

Answer:

The traits that are transferred from the parents to the offspring during reproduction are determined by genes, located on chromosomes, found in the nucleus.

Explanation:

During reproduction, there is a fusion of;

male gamete

female gamete

This leads to the formation of offspring. There is a transfer of traits from the parents to the offspring.

Hence, the traits that are transferred from the parents to the offspring during reproduction are determined by genes, located on chromosomes, found in the nucleus.

Answer:

(2) genes, located on chromosomes, found in the nucleus

Explanation:

Traits are determined by genes which are located on chromosomes. Chromosomes, on the other hand, are located in the nucleus.

Answer:B Cetacean!

Explanation: Cetacean means marinemarine mammal and Gray Whales are mammals. #Im a teacher :)

Ex

Answer:

•function of the ovary is to produce the egg which develops in the Graafian follicle. The ovary is also responsible for the production of the hormones progesterone and estrogen.

Answer:

(B) homeostasis

Explanation:

Homeostasis is the maintenance of a stable internal environment. Homeostasis is a term coined to describe the physical and chemical parameters that an organism must maintain to allow proper functioning of its component cells, tissues, organs, and organ systems.

Answer:

A.) In multicellular organisms, cells differentiate.

Explanation:

A.) is correct because eukaryotes are multicellular organisms. Not all of these cells are located in the same place or serve the same function. Because of this, many cells need to differentiate. When organisms have more specialized cells, they need to have more complex gene regulation processes in order to create these cells and control their behavior.

B.) is incorrect because eukaryotes have more chromosomes than prokaryotes. While prokaryotes only have one circular chromosome, eukaryotes can have many more depending on the species.

C.) is incorrect eukaryotes are not single-celled organisms. Eukaryotes are multicellular organisms and prokaryotes are single-celled organisms.

D.) is incorrect because eukaryotes have a lot more DNA than prokaryotes. This makes sense because eukaryotes are more complex than prokaryotes.

Answer: A. in multicellular organisms cells

Explanation:

An engine cut-off lanyard helps to reduce the risk of striking a person in the water with a propeller. The correct answer is option 2.

A propeller is a device with rotating blades that is used to propel a vehicle through a fluid, such as air or water. In the context of boating, a propeller is a rotating device that is attached to an engine and used to propel a boat through the water.

An engine cut-off lanyard is a safety device that is attached to the operator of a boat and to the engine's kill switch. If the operator is thrown from the boat, the lanyard will pull the kill switch, stopping the engine and preventing the propeller from causing injury to the operator or others in the water.

Therefore, an engine cut-off lanyard is an important safety feature that can help prevent accidents and injuries on the water. Option 2 is the correct answer.

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The given question is incomplete. The complete question is:

An engine cut-off lanyard helps to reduce the risk of what?

1. Stopping the engine if the oil level gets low·

2. Striking a person in the water with a propeller·

3. Starting the engine without proper choke applied·

4. Over-revving an outboard engine at idle

The Sun creates a lot of thermal energy in the atmosphere and the oceans. Currents created as warm equatorial waters move to the north carrying heat. Due to this, the cold polar waters go south, and there get heated.

Thermal energy refers to the energy within a system and is responsible for its temperature.

The Sun heats up the air at the equator. This air will move toward the poles and cools down there with time.

In this process, the wind that occurs due to air currents will induce currents at the ocean surface.

The currents at this surface are propagated down deeper due to the differences in the forces on different parts of the water.

Thus, It is the main reason that the sun hits the ocean at the equator more directly than at the poles.

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Answer:

Which of the following BEST describes the way you would engineer bacterial cells to produce a human protein? Use restriction enzymes to cleave both the donor DNA and the vector DNA.

Answer:

The answer is substances in solution.

Explanation:

Olfactory cells and taste buds are normally stimulated by substances in solution.

Olfactory cells are normally stimulated by odorants, which are chemical substances that are volatile and capable of being detected by the sense of smell.

Taste buds, on the other hand, are normally stimulated by tastants, which are chemical compounds that can be tasted. Tastants include various molecules such as sweet, sour, bitter, salty, and umami compounds.

Both olfactory cells and taste buds play crucial roles in our perception of smell and taste, respectively, and they are stimulated by specific chemical substances that interact with receptors present in these sensory cells

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Answer:

B.

Explanation:

wont let me say the word but it means to be the same as something according to gogle. SO it would make sense that if something was the same as another for them to be in harmony.

The type of DNA sample that would MOST likely be successful using RFLP is a sock soaked in human sweat.

Restriction Fragment Length Polymorphism (RFLP) is a type of molecular marker used to identify samples of DNA.

RFLPs are fragments of different lengths that can be separated by electrophoresis and then identified.

In conclusion, the type of DNA sample that would MOST likely be successful using RFLP is a sock soaked in human sweat.

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Answer:

a sock soaked in human sweat

Explanation:

a variation in the length of restriction fragments produced by a given restriction enzyme in a sample of DNA. Such variation is used in forensic investigations and to map hereditary disease.

Answer:

Well, an extinct species refers to a single species completely dying off whereas a mass extinction happens when a massive number of species all dye off at the same time.

Explanation:

For example, when the asteroid wiped out all the dinosaurs that was a mass extinction, but the gradual disappearance of the African Black Rhino would simply be considered as an extinct species because of the fact that not every kind of Rhino to ever exist was wiped out.

Common Side Effects: Nicotine is known to cause decreased appetite, heightened mood, increased heart rate and blood pressure, nausea, diarrhea, better memory, and increased alertness.

Answer: b. fossil fuels are nonrenewable, so humans will run out of them eventually. burning fossil fuels also contributes to global climate change by releasing carbon dioxide into the atmosphere.

Explanation:

Fossil fuels are limited and we will run out of them eventually. They cannot be replenished in a single human's lifespan. Fossil fuels contribute to the destruction of ecosystems, but not only that. They release carbon dioxide into the atmosphere that warms the Earth. Therefore, anything other than B. would be incorrect.

Answer:

Point B

Explanation:

Point B is getting the most light and is closet to the surface

Point B is getting the most light and is closet to the surface.

The daily cycle of light and dark in the photic zone of the world's oceans is maybe the most potent environmental signal accessible. Russell's suggestion that zooplankton resided in depths with the best light intensity was one of the early reports to propose that light had a major role in vertical migration.

He went on to say that as animals strayed from this zone of ideal light intensity, physiological responses governed by photochemical systems prompted them to come back.

Subsequent reviewers came to the conclusion that there was a lot of (although speculative) evidence that light had a substantial role in controlling fish's vertical migration.

Therefore, Point B is getting the most light and is closet to the surface.

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