Answer:
A
cell division makes the number of chromosomes get reduced to only a half of the original
Answer:
B Meiosis is a two-step process, and the cells divide twice
Explanation:
Tried A on my test and was wrong. B was correct
Homogeneous means?
A. The components of the mixture form a single phase
B. The particles of a solution are in harmony with each other
C. The solution can change phases
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.
Explain why the radiolabel was present in the homogenate. Describe the role of light in the synthesis of ATP and NADPH and how the absence of light may have affected this process
During photosynthesis, light excites electrons in the photosystems and it is used to generate ATP and NADPH.
What is photosynthesis?Photosynthesis is a series of chemical reactions used by plants to generate carbohydrates by means of light energy (solar radiation).
During this process, light excites electrons in the photocenters and this energy can be converted to chemical energy via ATP and NADPH production.
In conclusion, during photosynthesis, light excites electrons in the photosystems and it is used to generate ATP and NADPH.
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What are some of the ways modern Americans rely on a global agriculture system?
Critical Thinking Questions
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.
What is the role of globalization in agriculture?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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Gene regulation is more
specific in eukaryotic
organisms because . . .
A. in multicellular organisms cells differentiate.
B. there aren't as many chromosomes.
C. they are single-celled organisms.
D. their DNA is much smaller than in prokaryotic organisms.
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:
Elizabeth wants to test DNA using Restriction Fragment Length Polymorphism (RFLP). What type of DNA sample would MOST likely be successful using RFLP
The type of DNA sample that would MOST likely be successful using RFLP is a sock soaked in human sweat.
What is RFLP?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.
What are two global issues associated with using fossil fuels for energy?(1 point)
fossil fuels are nonrenewable, so humans will run out of them eventually. burning fossil fuels also only damages nearby ecosystems.
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.
fossil fuels are nonrenewable, so humans must use less to allow them to be replenished naturally. burning fossil fuels also contributes to global climate change by releasing carbon dioxide into the atmosphere.
fossil fuels are nonrenewable, so humans must use less to allow them to be replenished naturally. burning fossil fuels also only damages nearby ecosystems.
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.
Which of the following is not a pathogen?
A- Bacteria
B- Viruses
C- Fungi
D- Antibiotics
Answer:
Antibiotics is no a pathogen
Energy Flow in Ecosystems
Answer:
Energy flow in ecosystem is SOLAR ENERGY.
an engine cut-off lanyard helps to reduce the risk of what?
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
Traits are passed from parents to offspring. These traits are determined by
(1) chromosomes, located on genes, found in the nucleus
(2) genes, located on chromosomes, found in the nucleus
(3) chromosomes, located on genes, found in the ribosomes
(4) genes, located on chromosomes, found in the ribosomes
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.
Select from the drop-down menu to correctly complete the statement.
A _____ is a group of individuals of the same type that live in a particular area.
Which gland/organ is responsible for the production of estrogen and ova?.
Answer:
Ovaries•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.
When it is winter in North America, it is summer in South America. Explain why this happens. Read the assignment carefully and make sure you answer each part of the question or questions. After you've written your response, go back and read it again to make sure your thoughts are clear.
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.
What does it mean when you see flashing lights in your eyes?.
what is the difference between an extinct species and a mass extinction?
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.
Describe the process of coronary circulation.
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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What does it mean to say a gene is under both positive and negative regulation?.
Answer:
In negative control, a regulatory protein shuts down transcription, and in positive control, an activator switches on transcription.
Explanation:
.
How does a nuclear reaction compare to a chemical reaction?
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.
What species is the gray whale?
A Reptile
B Cetacean
C Lepidoptera
D Salmon
Answer:B Cetacean!
Explanation: Cetacean means marinemarine mammal and Gray Whales are mammals. #Im a teacher :)
Ex
70 POINTS
Write “D” if for DNA, “R” if for RNA, or “BOTH” if it pertains to both DNA and RNA.
1 ._________ I am a nucleic acid.
2 ._________ I am usually single - stranded.
3 ._________ I am generally found both in side and outside of the nucleus [in eukaryotic cells].
4 ._________ I am arranged as a double helix , and my shape is often described as a “twisted ladder.”
5 ._________ I include bases guanine, cytosine, and adenine .
6 . ________ Each of my nucleotides includes a phosphate, sugar, and base .
7 ._________ I include the base uracil .
8 ._________ I include the base thymine .
9 ._________ I generally remain in the nucleus [in eukaryotic cells].
10 .________ I have the sugar deoxyribose.
11 .________ I am made up of nucleotides .
12 .________ I have the sugar ribose .
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
In your own words wright a paragraph of the process of the respiratory system. 4-7 sentences
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:
Which animal is native to a different part of the world than the other two?.
Why would someone living in Zone 3 (last frost date is late
May) or Zone 4 (last frost date is early June) decide to plant
seedlings, which are young plants grown indoors from
seeds, rather than seeds directly into the ground?
A body of fresh water is shown below.
B
Which point in this body of water is most likely to be in the photic zone?
A. Point D
B. Point B
C. Point A
D. Point C
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.
What is Photic zone?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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given the dna sequence of tcg what would be the mrna created
What is the regulation of stable internal conditions inside an organism or a cell?
A. Responding to stimuli
B. Homeostasis
C. Obtaining and using energy
D. Cellular respiration
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.
why is nicotine harmful for you
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.
What is a keystone species? Why are keystone species important? Give and example.
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.
Dna polymerase is most active during which phase of the cell cycle?.
Answer:
yes it is. That is because DNA has a definite purpose. and is most active during when it is in the important phase.....
the cell cycle
Which of the statements best describes the way you would engineer bacterial cells to produce a human protein?.
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.