Answer:
C. Calcium (CA)
Explanation:
other Alkaline Earth metals in period 4 are, beryllium (Be), magnesium (Mg), strontium (Sr), barium (Ba), and radium (Ra)
Answer:
calcium is part of the alkaline earth metals family
determining the order of events and the relative age of rocks by examining the position of rocks in a sequence is called___.
A) absolute dating
B) radiometric dating
C) relative dating
D) radiocarbon dating
Answer:
C) relative dating
The maintenance of a self-sustaining ecosystem requires a
A.soil that is acidic
B.constant temperature
C.greater numberof herbivores than producers
D.cycling of materials between organisms and their environment
Which of the following best represents the correct sequence of letters in Photosynthesis? *
A. 1
B. 2
C. 3
D. 4
Answer:
I think it's B
Explanation:
I hope this helped :)
List 5 pairs of organisms that rely on each other to survive the Everglades ecosystem.
Answer: there are multiple
Explanation: but is it plants or animals your talking about
Why did Darwin see savage competition as a creative process?
Answer: According to Darwin theory of evolution the struggle for existence is considered as major part for competition among living things.
Explanation:
Coexisting species that belong to the same genera compete for same kind of resources for their survival. Some phenotypic variations gives an survival advantage over others. The superior ones dominate the inferior ones and compete for resources. The one who receives the resources like mates, food, shelter, and others the chances of survival also increases considerably.
Which model of replication did the actual results of the Meselson-Stahl experiment support? Explain your answer.
Answer:
Semi-conservative replication
Explanation:
After the double-helix discovery of Watson and Crick, there were three possible models about the DNI replication:
The Conservative model stated that the two strands of DNI together were the template of another new molecule. The final product was the original double-stranded molecule and the new molecule. The semi-conservative model stated that the original DNI molecule separated into two strands, and each of them served as a template for the synthesis of a new complementary strand. The replication product would be two double-stranded DNA molecules, each carrying an original strand a new one. The Dispersive moles stated that the replication product would be two molecules made by a mixture of segments of the original and the new molecules.Meselson and Stahl joined to discover which of the models was the correct one. To do it they used E. coli and Nitrogen isotopes.
First, they extracted DNI from bacteria grown in a medium with N¹⁴ and got its density band by centrifugation. Then they grew bacteria in a medium with N¹⁵, extracted their DNI molecules, centrifugated them, and got the density band, which was heavier than the firsts ones. The researchers then transferred bacteria grown in medium with N¹⁵ to a medium with N¹⁴, and they allowed only one replication process to occur. DNI was extracted and centrifugated again, and a new band appeared. This band was an intermediate form between bands of DNI-N¹⁵ and DNI-N¹⁴.This event eliminated the conservative model. If this model were correct, the expected result would be to get two bands: one corresponding to the density DNI-N¹⁵ and the other corresponding to the density DNI-N¹⁴.
Bacteria grown in a medium with N¹⁵ and then transferred to a medium with N¹⁴ were finally allowed to replicate twice. Their DNI was extracted and centrifugated. The result was two bands: one of them coincided with the intermediate band, and the other one with the DNI-N¹⁴.This result was conclusive because if the dispersal model were correct, these two bands should not appear, as all the DNI strands would have part of the original molecule.
With this experiment, Meselson and Stahl proved that the correct replication model was the semi-conservative one.
3. How does the atmosphere benefit life on Earth?
A. It provides light to Earth
B. It breaks down dead plants and animals.
C. It filters out certain harmful rays from the Sun
Answer:
C. It filters out certain harmful rays from the Sun
Explanation:
A: the Sun is what provides light to Earth
B: decomposers break down dead plants and animals
So C: It filters out certain harmful rays from the Sun, is correct
Please help it is due at 12
Show how artificial selection could be used to develop a new breed of wheat with higher fiber content
Answer:
get wheat that has the desired content (in this case high fiber content)
breed them
amongst the offsprings/ wheat produced, select the ones with highest fiber content
breed them
repeat this process for many generations
Explanation:
Artificial selection is a process of selective breeding where humans choose certain traits to breed for in plants or animals.
What would happen in case of wheat?In the case of wheat, we could use artificial selection to develop a new breed of wheat with higher fiber content by selecting individual plants with the desired traits and breeding them together over several generations.
Below are the steps:
Identify wheat plants with higher fiber content: The first step would be to identify individual wheat plants that have naturally higher fiber content. This could be done by analyzing the fiber content of different varieties of wheat and selecting those with the highest fiber content.
Crossbreed the selected plants: Once we have identified wheat plants with high fiber content, we can crossbreed them to create a new hybrid variety. This involves taking the pollen from one plant and fertilizing the flowers of another plant with it. The resulting seeds will have a mix of genetic traits from both parent plants.
Select the desired traits in the hybrid plants: After the hybrid plants have grown, we would need to evaluate them for their fiber content. We would select the plants with the highest fiber content and use them as parents for the next generation of plants.
Repeat this process for several generations: The process of selective breeding would be repeated over several generations, with each generation being evaluated for fiber content and only the plants with the highest fiber content being used for breeding. This would increase the likelihood of producing a new wheat variety with consistently high fiber content.
Test and refine the new wheat variety: Once a new wheat variety with higher fiber content has been produced, it would need to be tested for its nutritional value, taste, and other characteristics. If the new variety meets the desired criteria, it could be released for commercial production.
In summary, artificial selection can be used to develop a new breed of wheat with higher fiber content by selectively breeding individual plants with high fiber content and repeating the process over several generations until a new variety with consistently high fiber content is produced.
Learn more about artificial selection at:
https://brainly.com/question/21618199
#SPJ2
Describe how deposits of gold and copper are formed.
Answer:
Gold are formed in the
Part of the Gold exhibition. Gold may occur as deposits called lodes, or veins, in fractured rock. It may also be dispersed within Earth's crust. Most lode deposits form when heated fluids circulate through gold-bearing rocks, picking up gold and concentrating it in new locations in the crust.
Explanation:
Copper formed in the
Most nonrecycled supplies come from porphyry copper deposits (PCDs), which form when hot, metal-bearing fluids percolate up through Earth's crust. ... These fluids bubble up through the crust and collect in pores in the rock, where they sit, waiting for the final step that will allow them to form copper minerals.Jun 7, 2015
HELP ASAP!!NO LINKS OR UNRELATED ANSWERS (I WILL REPORT YOU IF YOU DO)
Muscle cells make up about ____________ of your body mass.
A. a quarter
B. half
C. three quarters
Answer:
I'd say B. Muscles make up about 40% of the body so the cell amount should be even.
Whích DNA strand is complementaryto the DNA strand TAC CTA AGT GCA
A. ATG GAT TCA CGT
B. GTA TAG ACT TGC
C. GGG CAG CAG GAT
D. TCA CGT GAT ATG
Answer: A
Explanation:
G is opposed to C
And C is opposed to G
T is opposed to A
And A is opposed to T
List 3 main functions of the cutaneous membrane (skin).
Answer:
The cutaneous membrane is the technical term for our skin. The skin's primary role is to help protect the rest of the body's tissues and organs from physical damage such as abrasions, chemical damage such as detergents, and biological damage from microorganisms.
Explanation:
Which of the following is a true statement? A. Both electric fields and electric forces maintain their strength at the distance increases. B. Both electric fields and electric forces increase in strength as the distance decreases. C. Electric fields don't change in strength with distance from a charge, but electric forces do. D. Electric forces stay the same as distance changes, but electric fields change.
Scientists are concerned about a decrease in global biodiversity due to extinctions of organisms now and in the future. Scientists know about a mass extinction that wiped out the dinosaurs in a very short time. Describe a possible cause of this mass extinction and two consequences that may give scientists cause for alarm about the possibility of future mass extinctions.
Answer:
Mass extinctions happen because of climate change, asteroid impacts, massive volcanic eruptions or a combination of these causes. One famous mass extinction event is the one that lead to the extinction of dinosaurs, 65 million years ago.
Explanation:
Which example is classified as a body fossil?
Answer:
The fossils of bones, teeth, and shells are called body fossils.
Explanation:
Gressel the Goblin is making an inventory of Darklord Ganondorf’s treasure horde following a raid by some violent fellow named link. The horde now contains only 2150 gems (as in $). Gressel notices that there were twice as many green-gems (worth 1) as blue-gems (worth 5) and 13 fewer blue gems than red-gems (worth 20). How many red, blue and green gems are there remaining in the horde?
➥ Let the number of blue gems be x, green gems be 2x and red gems be x + 13.
According to question,
5x + 1 × 2x + 20(x + 13) = 2150
On solving equation, we get
27x + 260 = 2150
27x = 2150 - 260
27x = 1890
x = 1890/27 = 70 blue gems.
2 × 70 = 140 green gems.
70 + 13 = 83 red gems.
Hence, We have 70 blue gems, 140 green gems and 83 red gems.
what are the variables in carrying capacity
This is leaving an area of birth or activity for another area. Movement causes a change in
population. Leaving is analogous to emigration.
Answer:
Yes.
Explanation:
Yes, Leaving is analogous to emigration because in emigration the person leaves the country permanently and settles in another country for the job. There are many reasons of emigration of a person such as job opportunities in another country, warfare in the country etc. In emigration, the person leaves the country permanently and settles in another country to made his social status better in the society. There are good job opportunities that force people to leave their country.
helpppppp pleaseeeeeee
Why are cells of different shapes and sizes? Give suitable examples.
Answer:
Some cells are different shapes as they have different ways of attempting to pass through the immune system they are different sizes as some of them want to make sure that the white blood cells cannot swallow them as easily at that point antitoxins are released to break them down
Explanation:
Data for the antler size of the Texas longhorn is shown here. These were introduced from Europe to the United States several hundred years ago. Over that time, the population of longhorns has evolved. Which explanation(s) could apply to the scenario shown here? Select ALL that apply.
Answer:
A,B,E
Explanation: usa testprep
When a population is introduced in an area, the genetic variation thus introduced will lead to marked evolution in the species.
What is Evolution?The question is incomplete but I will help you the much I can. Let us recall that evolution is the sum total of all the gradual changes that occurs in an organism untill it arrives at its present form.
It should be know that when a population is introduced in an area, the genetic variation thus introduced will lead to marked evolution in the species.
Learn more about evolution: https://brainly.com/question/365923
Which type of tectonic plate interaction forms a mid ocean ridge?
Answer:
Divergent plate
Explanation:
A semi ocean ridge is formed by the interaction of divergent boundaries. Around divergent plate boundaries, as additional sea floor is formed as the Earth's tectonic plates expand outward, half ridges form. Igneous material grows to the ocean bottom when the plates split, resulting in massive basalt volcanic activity.
Watch the seven minute video on the "Mystery of the Buffalo boom" on you tube. Write a reflection on how scientists used their reasoning skills to make a claim about causes of the "buffalo boom".
Answer:
In the "Mystery of the Buffalo boom" scientists first try to find the answer in the two most common things that can affect a population of animals. Food and predators.
First, they studied the buffalos' food supply, grass. They found that there has not been an increase in it so that the number of buffalos multiplied.
Then they studied the predator's population, and they found that there was not a decrease in the number of them that could affect the buffalos increasing numbers.
As the two main things that controlled a population were not affected, they had to find other causes. The next thing that they studied were historical facts about buffalos and diseases. Scientists discovered that a virus that affected cows had impacted these animals too, which was the cause of a considerable decrease in the buffalo's population many years back.
Due to the drastic impact that the rinderpest had on cows, a vaccination plan was implemented. As the cows now were protected against this virus, the virus could not reproduce as it did, ending the spreading of this disease in cows. As a consequence, the buffalos were no longer infected, and their population grew thanks to the vaccination plan.
In conclusion, when the most common things that can affect a population are not the cause, we have to look into the past and find what has changed and how it impacted the animals. It is using logical thinking skills to determine what has changed and what that change made.
Explanation:
In the video "Mystery of the Buffalo boom" the ecologist Tony Sinclair found an abnormal buffalos' number in Tanzania. As the increase in the buffalos' population was something unusual, he knew that something had changed, but he did not know what. Sinclair, with other scientists, used their reasoning skills and thought that the two most logical things that can affect a population are food and predators. When they studied these two variables, they found out that they were not the problem. The next step was to look for past events that impacted buffalos. They found out that a virus, which directly affected cows but also buffalos, had been erased from the Earth thanks to a vaccination plan. As a result, the disease spreading between cows stopped, and as a consequence, it also stopped between buffalos.
We can see that everything is connected and that by using reasoning skills and logic, scientists could determine what happened.
plz answer this question what is it
Answer:
option(D) is right answer
Explanation:
because human takes oxygen and plants take carbon dioxide
Answer:
well, what we can do here is eliminate what we know. It's not A, because ALL living organisms reproduce. (examples include humans, cows, plants, etc.) for now, until we see the other answers, we will skip b. It can't be C, because on a trusted website, it states that the unified cell theory states that: all living things are composed of one or more cells; the cell is the basic unit of life; and new cells arise from existing cells. Rudolf Virchow later made important contributions to this theory. ... All organisms are made up of one or more cells.
If we take a look at D, It could be true because in another trusted website, it states that Oxygen helps organisms grow, reproduce, and turn food into energy. ... Although other animals may use different organs to breathe with, they all get oxygen into their bodies through respiration. So, Looking back up to B, it seems less likely now that we've viewed everything. D is the answer, I wasn't paying attention earlier, haha.
Hope this helps! brainliest is appreciated :)como entra la piedra caliza en la fabricación del vidrio y del cemento?
Answer: Fabricación de Cemento: en este proceso la piedra caliza es la base del cemento, y este se crea por la combustión de una mezcla de la piedra caliza y otros materiales, aportando la propiedad de dureza.
Espero que esto ayude
No links! pls help
What process is occurring in the illustration?
a) classic ecosystem
b) climax community
c) primary succession
d) secondary succession
Answer:
I believe its primary succession
Explanation:
Answer: C
Primary Succession
Explanation:
I took the quiz.
Identify 3 characteristics that plants share with algae.
Explanation:
I am sure you are clear. Thanks.
i need help please????
Answer:
a
Explanation:
Which of the following best describes the relationship between the new moon phase
and constellations?
A During the new moon phase, constellations take on different shapes due to a lack
of moonlight
B During the new moon phase, constellations are on the same side of the earth as
the sun
с
During the new moon phase, constellations are easier to see due to a lack of
moonlight
D
During the new moon phase, constellations are easier to see due to increased
sunlight
Answer: c
Explanation:
when there is lack of moonlight its easy to see star light
During the new moon phase, constellations take on different shapes due to a lack of moonlight. So, the correct option is A.
What are Constellations?Constellation is define as a group of stars that appears to form a pattern or picture, such as Orion the Great Hunter, Leo the Lion, or Taurus the Bull. Constellations are recognizable patterns that help people navigate the night sky where there are 88 official constellations.
The groups of stars which make an imaginary shape in the night sky are called constellations which are usually named after mythological characters, people, animals and object they resemble in shape. During the new moon phase, constellations take on different shapes due to a lack of moonlight which describes the relationship between the new moon phase and constellations.
Therefore, the correct option is A.
Learn more about Constellations, here:
https://brainly.com/question/18312623
#SPJ6