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uysha [10]
3 years ago
7

Consider air in contact with the surface of your arm. the reason that you do not feel the interaction of individual molecules of

air with your arm is because
Biology
1 answer:
slega [8]3 years ago
6 0
Humans bodies are meant to live on earth. We have never been without contact with air so we don’t notice it
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Question about nitrogen and phosphorous cycle? Which statements are true, list all that apply
vaieri [72.5K]

Answer: 1) When phosphorous is not bound in rocks, it moves quickly through land food webs. Constant use of phosphate-rich fertilizers will help increase phosphorus availability to plants, thus ultimately helping our ecosystems.

3) Minimizing the use of ammonia-rich fertilizers on lawns would not add excess nitrogen to the nitrogen cycle. As a result, it would help decrease the pollution of food webs in the oceans, decrease soil acidity on land, and decrease the amount of greenhouse gases in the atmosphere

Explanation:

The nitrogen and phosphorus cycles both are biochemical cycles. The nitrogen cycle involves the process of uptake of nitrogen from the atmosphere by the soil bacteria which is then become available to the plants for plant growth, from plants it is transferred to the other organisms in different forms.

The phosphorus is found in the rocks and these rocks wither and the inorganic phosphorus become available to the ecosystems.

Option 1 is correct, this is because the phosphorus is available on earth in the inorganic form inside the rocks, the withering and erosion processes make the phosphorus available to the plants. Another source of phosphorus to plants is phosphorus rich fertilizers. Thus plants will absorb phosphorus and grow. These plants will be consumed by other organisms thus the ecosystem will remain healthy.

Option 3 is correct, this is because nitrogen rich fertilizers can cause eutrophication in water bodies, or can contaminate the water. It will decrease the pH of the soil due to the formation of nitric acid. Also the nitrogen dioxide is the greenhouse gas.

 

4 0
3 years ago
The pH scale is a measurement system that indicates the concentration of blank in a solution
ivanzaharov [21]
The pH scale measures the concentration of how acidic or basic something is. The lower the number below 7, is acidic. Above 7 is basic. 7 is waters purest form.
6 0
3 years ago
Read 2 more answers
Why would the cell theory change over time?
alexandr402 [8]

Answer:

The invention of the microscope led to the discovery of the cell by Hooke. While looking at cork, Hooke observed box-shaped structures, which he called “cells” as they reminded him of the cells, or rooms, in monasteries. This discovery led to the development of the classical cell theory.

Explanation:

hope this helped you sorry if it did not

7 0
2 years ago
In a DNA strand, this nucleotide will "pair up" with:
kirill [66]

Answer:

C.

Explanation:

Every DNA nucleotide pair will consist of one pyrimidine and one purine. Due to the chemical structures of the different bases, adenine (A) will always bind with thymine (T) and guanine (G) will bind with cytosine (C). The same is true for RNA except that A always pairs with a close relative of thymine, uracil (U).

5 0
2 years ago
In a population of 100 four o’clock plants, there are 50 red-flowered plants with genotype CRCR, 30 pink-flowered plants with ge
Misha Larkins [42]

Answer:

a- CRCR frequency = 0.5

b- CRCW frequency = 0.3

c- CWCW frequency = 0.2

d- CR frequency = 0.65

e- CW frequency =  0.35    

Explanation:

Due to technical problems, you will find the complete explanation in the attached files.

Download pdf
3 0
2 years ago
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