Answer:
Key concepts and summary. A supernova occurs on average once every 25 to 100 years in the Milky Way Galaxy.
Explanation:
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Which of the following would most likely be reduced when combined with Al(s)?
Will be giving brainliest
Answer:
A
g
+
- oxidising agent
K
- reducing agent
C
l
2
- oxidising agent
Explanation:
A
g
+
- oxidising agent (most likely form Ag by gaining an electron)
K
- reducing agent (most likely form
K
+
by losing an electron)
C
l
2
- oxidising agent (most likely to form 2
C
l
−
by gaining electrons)
This is based on what is likely, not so much that the above are known to be oxidising or reducing agents.
The most likely option to be reduced when combined with Al(s) is Fe (iron). Therefore option C is correct.
Reduction refers to the gain of electrons by a chemical species. In this case, we are considering the reduction of ions when combined with solid aluminum (Al(s)).
Aluminum (Al) is more reactive than iron (Fe) in terms of its electrochemical properties. When aluminum reacts with certain metal ions, it tends to displace those ions and undergo oxidation itself. This process is known as a displacement or redox reaction.
Fe (iron) is less reactive than aluminum and can be displaced by aluminum in certain redox reactions. Therefore, it is the most likely option to be reduced when combined with Al(s).
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Young grouse crouch motionless near the ground when threatened by a predator. Owls
have needle sharp talons for catching prey. Buffaloberry plants have thick leathery leaves
that reduce water loss in summer. Insects have a hard exoskeleton that provides support
and allows movement.
Which of the organisms described above show a behavioural adaptation?
Young grouse
Owl
Insects
Buffaloberry plants
Answer:
the young grouse cause it crouch motionless near the groundwhen threatened
When the northern hemisphere points toward the sun, the southern hemisphere faces away from the sun. In this instance, it is:
A.
summer in North America, and winter in Australia.
B.
summer in North America and Australia.
C.
winter in North America, and summer in Australia.
Answer:
A
Explanation:
the northern hemisphere is the opposite from the southern hemisphere
Since northern and southern hemisphere are in opposite directions therefore, option (A) is correct.
Why are the seasons reversed in each hemisphere?The axis of rotation of the Earth is inclined with regard to the plane in which it orbits the sun. This is the root reason of the changing of the seasons. When the axis of the earth is aligned with the sun, summer arrives in that hemisphere of the planet. Expect winter to arrive when the axis of the earth is tilted away from the sun.
Different places of Earth receive the Sun's most direct rays throughout the year. When the North Pole tilts toward the Sun, it's summer in the Northern Hemisphere. When the South Pole tilts toward the Sun, the Northern Hemisphere experiences winter.
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The freezing point of a mixture of water and salt is
A. higher than that of pure water
B. the same as that of pure water
C. lower than that of pure water
D. none of the above
Answer:
lower
Explanation:
salt makes thing freeze faster
Answer:
A
Explanation:
Because when you mix a mixture and pure substances it’s higher
According to Vince Carter, "...the most important aspect of getting his degree was the sense of accomplishment it brought. " Use information from the selection and your own ideas to explain what he meant by this statement.
Answer:
the hard work he went through
Hydrogen ions are found in_____________
which hydroxide ions are found in_______
A. Acids and bases
B. Bases and acids
C. Acids and salts
D. Bases and salts
Answer:
A
Explanation:
found in acid and bases
at which temperature would air hold the least water vapor?
Answer: I believe it's 60 degrees Fahrenheit or less, Since heat is required to have proper evaporation, then this will only be leading to a portion of the water condensed leading to a half condensation
Explanation:
Answer:
the coldest temp in F holds the least amount of water vapor..
what direction was the texas annexation in?
Summarize cell division in prokaryotes
According to the research, the correct answer is that unicellular living beings like prokaryotes have their cell division by binary fission, forming two identical individuals (daughter cells).
What is binary fission?It refers to the process of cell division where first the deoxyribonucleic acid (DNA) is duplicated and then cytonesis occurs, which involves the separation of the cytoplasm.
In this sense, it gives rise to two daughter cells with identical genetic material, this is the reproduction method shared by certain yeasts, algae, bacteria and other prokaryotic organisms.
Therefore, we can conclude that the cell division mechanism of prokaryotes is through binary fission where two daughter cells arise.
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Why do carnivorous
plants sometimes "eat" insects and other organisms?
Answer:
Because.they are carnivours ya know
Answer:
Like all plants, carnivorous plants are capable of photosynthesis. Since they usually live in areas where the soil quality is poor, they must supplement their diet with nutrients gained from digesting animals. Like other flowering plants, carnivorous plants use tricks to entice insects.
Explanation:
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Combined sewage overflow has been linked to eutrophication in ecosystems within NYC, including Jamaica Bay and Coney Island Creek. Based on your understanding of eutrophication, why might combined sewage overflow be causing an overgrowth of harmful algae in NYC? Explain your answer in YOUR OWN WORDS please.
(This is 7th grade science).
like your name
Explanation:
is meiosis genetically identical?
Answer: No I read it on briticanna.com
Explanation:
Why are volcanoes so important to geologists?
Answer:
you can learn many things from them
Explanation:
scientists are able to examine, that volcanoes remove much of the earth's trapped heat when volcanoes erupt. Volcanoes also make new islands and scientists love to observe their habitats and the animals that inhabit them
the reactants of photosynthesis are
a: organic compounds
b: glucose and sunlight
c: glucose and water
d: glucose and carbon dioxide
e: water and carbon dioxide
Answer:
I think its e
Explanation:
Photosynthesis requires sunlight, carbon dioxide, and water as starting reactants
Can someone explain the Punnett square ?
Answer:
so in the punnet square, you hvae the 4 squares inside the big on. on top of the square, you have 2 letters, representing the dominant and the repressed genes. On one side, typically the left, you have another two letters, again genes. to get the gene types to fill in your squares, you take the first letter of the top set and the first letter of the side set. for this example, we are going to use Bb(top) and BB(side). you would take the B from the top, and you would pu it with the B from the side. in the top left square, you should have BB. next, you go and take that same top B and do it with the second letter of the side, B again. this again gives you BB. next, you take the second letter of the top, b, and you join it with B. in the top right square, you would write or type in Bb. Even though the b was on top, it is after the B because in this cause, it is not the dominant gene. when you do the second top and side letters together, you again get Bb.
Explanation:
the main points.
in this example, i used B to be the dominant gene and b to be the repressed/ submissive gene. you always put the dominant gene letter before the repressedmake sure you fill the squares in properly. in this one, you should have 3 BB and 1 Bb. this shows that the gene set BB is going to showwhen you fill in the squares, the first top letter and the first side letter fill in the top left square.the first top letter and the second side letter go left bottom.second top letter and first side letter go in right top.second top and second side go in right bottom.always place the dominant gene first in the punnet square.add me and message me if you need more help. we can also zoom to figure it out.
(Uhm help?) The law of conservation of energy states that when there is an energy transfer or transformation, energy is lost.
Assuming this is a true/false question, the answer would be false.
According to the law of conservation of energy, energy is neither created nor destroyed; it simply changes forms.
Unless you are saying that some energy would be lost as heat, This is true.
Answer:
ae you trying to find the meaning?
Explanation:
The law of conservation of energy states that energy can neither be created nor destroyed - only converted from one form of energy to another. This means that a system always has the same amount of energy, unless it's added from the outside. The only way to use energy is to transform energy from one form to another.
ex: the cue ball is shot at a stationary 8 ball. The cue ball has energy. When the cue ball hits the 8 ball, the energy transfers from the cue ball to the 8 ball, sending the 8 ball into motion. The cue ball loses energy because the energy it had has been transferred to the 8 ball, so the cue ball slows down.
The more a muscle is stimulated (working), the smaller it will get.
O
true
О
false
Answer: true
Explanation: Sometimes, a subset of muscle fibers is activated, depending on how much force is needed. When the muscle is stimulated, calcium ions are released from its store inside the sarcoplasmic reticulum, into the sarcoplasm (muscle ). ... The SR is smaller and less elaborate, and stores less calcium ions.
4) After a horrible car wreck, Jamie had a broken ankle, a few minor cuts, scratches, and a
large bruise across her chest from the seatbelt. While at the hospital, they kept checking her left
lung because it kept collapsing.
What systems are affected?
Why?
What is mass transport across the cell membrane
Under certain external conditions, a person will perspire a great deal. For which internal condition does this response primarily provide homeostasis?
Answer:
Abnormally high temperature
Explanation:
Sweating or perspiration is a homeostatic response to abnormally high body temperature. Evaporation of the sweat causes cooling of the body and this causes the temperature of the body to return back to normal.
When the setpoint temperature of the body is breached by being too high, the negative feedback mechanism kicks-in, and the sweat glands of the skin becomes activated. The body sweats, and the evaporation of the sweat from the surface of the skin causes cooling and a return back to the setpoint.
Which of the following is an example of resource partitioning?
A-Giraffes will often whack one another with their necks for control over food or mates
B-A fungus starts to decompose a dead tree, causing it to rot.
C-Various insects, such as lice, live on the bodies other organisms and eat their dead skin
D-Raccoons and foxes share the same territory, but raccoons hunt at night and foxes hunt during the day
Answer:
D
Explanation:
Resource partitioning is an example of sharing resources or splitting them up. In this case, both the raccoons and foxes hunt and share their territories or split them up depending on the time of day.
What are 3 lines of evidence that corroborate the theory of evolution?
Answer:
Lines of Evidence supporting theory of evolution by natural selection: Fossil evidence, Biographical evidence and Anatomical evidence.
Explanation:
I majored in Biology
What makes a fat saturated or unsaturated?
Answer:
Saturated fatty acids lack double bonds between the individual carbon atoms, while in unsaturated fatty acids there is at least one double bond in the fatty acid chain. Saturated fats tend to be solid at room temperature and from animal sources, while unsaturated fats are usually liquid and from plant sources.
Explanation:
All planets in the solar system have surfaces that are made up of either one of two materials. What are the two materials?
Answer:
are made of rock, containing common minerals like feldspars and metals like magnesium and aluminum.
Explanation:
Is playstatium a mineral?
70 POINTS Use the library and other reference materials to research the discovery of radioactivity and its current applications. Then, write a 500 word report on what you have learned. Be sure to include the contributions of French chemists Marie Curie and Pierre Curie and the medical uses of radiation.
Answer:
can I write an essay
Explanation:
On April 20, 1902, Marie and Curie with success isolate radioactive metallic element salts from the mineral uranium ore in their laboratory in Paris. In 1898, the Curies discovered the existence of the weather radium and metallic element in their analysis of pitchblende. One year once analytic radium, they might share the 1903 Nobel prize in physics with French soul A. Becquerel for his or her groundbreaking investigations of radioactivity.
Marie Curie was born Marie Sklodowska in Warsaw, Poland, in 1867. The girl of a physics teacher, she was a talented student and in 1891 visited study at the university in Paris. With highest honors, she received a degree in physical sciences in 1893 and in arithmetic in 1894. That year she met state capital Curie, a noted French man of science and chemist who had done vital add magnetism. Marie and Pierre married in 1895, marking the start of a scientific partnership that will accomplish world renown.
What is the relationship between a person's PULSE RATE and his or her HEART BEAT? A. The heart beat is always double the pulse rate. B. The heart beat and pulse rate may change, but are always equal. C. The heart beat is always half of the pulse rate. D. There is no relationship between the heart beat and the pulse rate.
Answer:
B. The heart beat and pulse rate may change, but are always equal.
Hope this helps :D Have a fantastic day
students observed several prepared slides of a process that occurs in a dividing onion cell. they observed haploid cells in one slide, centromeres that did not separate during anaphase in another slide, and two different cell divisions resulting in 4 daughter cells in other slides. Which statement is not true about the process that was observed?
1.) the slides were of an egg cell or sperm cell
2.) the process observed produce genetically different cells
3.) the number of chromosomes resulting from the process is reduced by half
4.) the observations suggest cellular reproduction and general growth and repair of the body.
Answer: pretty sure it could be “B”.
Explanation:
Meiosis produces 4 haploid cells -gametes- from a single diploid cell. The statement that is not true is 4). the observations suggest cellular reproduction and general growth and repair of the body.
Observed prepared slides:
haploid cells in one slide.centromeres that did not separate during anaphase in another slide.cell divisions resulting in 4 daughter cells in other slides.
According to this information, we can assume that the students are observing the occurrence of meiosis events.
MeiosisThrough Meiosis, a diploid cell (2n) produces four haploid daughter cells (n). Thes haploid cells are the gametes.
After DNA replication there are two meiotic phases.
The first one is a reductive phase, in which homologous chromosomes separate. In the second phase, the cell suffers a new, not reductive division.1. In the first phase, Meiosis I:
Prophase I: Chromosomes condensate and become visible. Occurs crossing-over between homologous chromosomes. Crossin-over makes the daughter cells to be genetically different from the original one. Metaphase I: Homologous chromosomes randomly align in the equatorial plane. Anaphase I: In this phase occurs the division and independent separation of homologous pairs. Each chromosome migrates to different poles. This separation generates different chromosomal combinations in the daughter cells. Telophase I: Chromosomes of homologous pairs are already in the corresponding poles, and the nuclear membrane forms again in each pole. Cytokinesis occurs.2. In the second phase, Meiosis II:
Prophase II: Chromosomes condensate again and become visible. Metaphase II: Chromosomes join the spindle apparatus and migrate to the equatorial plane, where they randomly line up. Sister chromatids are holden together until they reach the Anaphase. Anaphase II: Centromeres divide, chromatids get separated, and each of them goes forward an opposite cellular pole. Telophase II: Once in the poles, the chromosomes become lax again, and the nuclear membrane forms again. Cytokinesis occurs. Options1.) the slides were of an egg cell or sperm cell ⇒ Correct. It makes reference to gametes -haploid cells-.
2.) the process observed produce genetically different cells ⇒ Correct. After crossing over and independent segregation of chromosomes.
3.) the number of chromosomes resulting from the process is reduced by half ⇒ Correct. After the reductive phase.
4.) the observations suggest cellular reproduction and general growth and repair of the body. ⇒ INCORRECT. Mitosis is in charge of general growth and repair of the body, not meiosis.
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A. Of the 100 cells shown, how many are in the process of dividing?
Answer:
Can you show me a picture? I can't answer your question without being able to see a picture or a graph of some sort. Thanks!
Explanation:
What appearance is liquid and gas? Choose all that apply.
A: Flows
B: Rigid
C: Stays at bottom of the container
D: Holds it's shape
E: Fills container
F: Takes shape of container
G: No visible shape
Answer:
2 shows the differences among solids, liquids, and gases at the molecular level. A solid has definite volume and shape, a liquid has a definite volume but no definite shape, and a gas has neither a definite volume nor shape
Explanation:
