The Earth’s core is made of an alloy ofA. iron and nickel.
B. copper and iron.
C. zinc and magnesium.
D. iron and zinc.

Answers

Answer 1

Answer:

Answer:

Option A

Explanation:

The core of earth has two parts

a) Outer core – The outer core is made up of molten alloy of iron and nickel. However, it also has traces of dense materials like gold, platinum, and uranium etc. These materials are contained at a very high temperature i.e 9,000 and 13,000 degrees Fahrenheit.

b) Inner Core – It is composed of solid dense iron but the iron is not in its purest form. It has some impurities such as sulfur etc. It has temperature ranging between 7000 to 9000 degrees Fahrenheit and is responsible for earth's magnetic field.

Hence, option A is correct

Answer 2

Answer: It would be A. Iron & Nickel.
Hope it helps you!:)

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A farmer's fields, which are close to a stream, has experienced a lot of runoff. One possible effect of the runoff is that the stream will have a decreased level of fertilizers from the field. True od False

Answers

Answer: False

Surface run off is a kind of water erosion in which the surface layers of the top soil containing minerals and sediments is wiped out by the water and deposited to some other place. In the given situation, the surface run off of the farmer's field close to the stream will likely to remove the fertilizers hence,the level of the fertilizers in the stream is likely to increase.

it's false. the runoff will increase the fertilizers in the stream, because it takes whatever is siting on the surface.

The second generation phenotypes resulting from the cross of purebred monohybrid pollination will display a ratio of _____. 2:2 4:1 3:1 none of the above

Answers

The answer is 3:1.

If we imagine that plant has two alleles for the trait, we can dominant allele represent with P represents and recessive allele with p. To get purebred monohybrid in the first generation, parents must be a dominant homozygote (PP) and a recessive heterozygote (pp):

Parental generation: PP x pp
The first generation: Pp Pp Pp Pp

Pp represents a heterozygote.
If we cross these heterozygotes:

The first generation: Pp x Pp
The second generation: PP Pp Pp pp

If dominant allele determines the phenotype, there will be 3 plants (one PP and two Pp) with one phenotype and only 1 plant (pp) with another phenotype and vice versa.

3:1 is correct, had this question earlier

Parasitism in finding nemo

Answers

Its been a while since I saw that movie but I believe there was a clip with a school of fish following a large fish around. The smaller fish get a source of food by cleaning / removing parasites from the large fish. The large fish obviously gets those little pests removed. That is an example of both parasitism and mutualism.

In the movie Finding Nemo, there are several examples of parasitism.

Parasitism is a type of symbiotic relationship in which one organism benefits at the expense of another organism. The organism that benefits is called the parasite, while the organism that is harmed is called the host.

One example of parasitism in Finding Nemo is the relationship between the cleaner shrimp and the fish that it cleans. The cleaner shrimp is a parasite, while the fish is the host. The cleaner shrimp benefits by feeding on the parasites and dead skin of the fish, while the fish benefits by having its skin cleaned. This is an example of mutualism, a type of symbiotic relationship in which both organism's benefit.
Another example of parasitism in Finding Nemo is the relationship between the anglerfish and the fish that it preys upon. The anglerfish is a parasite, while the fish is the host. The anglerfish benefits by using its bioluminescent lure to attract prey, while the fish is harmed by being eaten.

In conclusion, parasitism is a type of symbiotic relationship in which one organism benefits at the expense of another organism.

Learn more about Parasitism here:

brainly.com/question/30669005

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A cell turns glucose from thefood we eat into energy for our
body to use. What cell function
does this describe?

Answers

Answer:

$\boxed {\boxed {\sf Cellular \ respiration}}\n$

Explanation:

The process of cellular respiration occurs in the mitochondria of cells. It goes through 3 stages: glycolysis, the citric acid/Krebs cycle, and the Electron Transport Chain.

The equation is:

$C_6H_(12)O_6+6O_2 ->6CO_2+6H_2O+38 \ ATP$

In this aerobic process (requires oxygen), glucose (C₆H₁₂O₆) from the food animals eat or produced from photosynthesis and oxygen are converted into carbon dioxide, water, and useable energy (ATP).

So, the cell function described is cellular respiration.

explain why you cannot draw a conclusion about the effect of one variable in an investigation when the other key variables are not controlled

Answers

The variables that aren't controlled can effect the results as well as the variable you are controlling. With more that one key variable changing, you cannot draw a conclusion about the effects of any of them.

Feedback mechanisms have evolved that maintain homeostasis. Describe how homeostasis is maintained through feedback. In your answer be sure to: 1. Identify one feedback mechanism in the human body, 2. identify, other than death, one specific result if homeostasis fails in the human body.

Answers

Homeostasis is maintained through feedback because when one certain parameter of your body goes out of the homeostatic bounds, feedback mechanisms will message this back towards the regulatory mechanisms which are responsible for homeostasis maintenance in the first place. Another thing, other than death, which can happen would be a higher bodily temperature for example.

Final answer:

Homeostasis maintains a stable internal environment in organisms through feedback mechanisms. An example of a feedback mechanism is the regulation of blood glucose levels. If homeostasis fails, diseases such as diabetes may emerge.

Explanation:

Homeostasis is the process where an organism maintains a stable internal environment, which is crucial for survival. This stability is achieved through feedback mechanisms. These mechanisms monitor and adjust various biological systems within the body to maintain balance.

One example of a feedback mechanism in the human body is the regulation of blood glucose levels. When blood glucose levels rise, the pancreas produces insulin, which promotes the uptake of glucose into cells, reducing blood glucose levels. This is an example of a negative feedback mechanism because the effect of the response to the stimulus is to reduce the original stimulus. Conversely, if blood glucose levels fall, the pancreas produces glucagon, which prompts the liver to release stored glucose, thus increasing blood glucose levels.

If homeostasis fails in the human body, one specific result, beside death, could be the emergence of diseases such as diabetes. If the feedback mechanism for regulating blood glucose levels is impaired and the body doesn't produce enough insulin or the body's cells resist the effects of insulin, the result is high blood sugar and diabetic conditions.