In this mass spectrum, which peak most likely represents the molecular ion?.

1 answer:

5 0

The presence of the base peak at 45 in combination with our knowledge about the nitrogen rule suggests that the peak at m/z 60 is likely the molecular ion because even molecular ions usually produce odd molecular fragments by breaking single bonds.

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Why phytoplankton biomass decreases between June and July

timurjin [86]

Answer:

The cause of phytoplankton blooms has traditionally been attributed to seasonal changes in ‘bottom-up’ environmental factors controlling phytoplankton division rates, such as nutrients and light 3,4,5,6,7. However, seasonal changes in phytoplankton biomass (P) represented by the biomass-specific net rate of change (r) always reflect the interplay between two dominant terms, the phytoplankton division rate (μ) and the sum of all loss (l) rates (e.g., grazing, viruses, sinking):

Explanation:

The photosynthetic production of organic carbon by marine phytoplankton plays a key role in regulating atmospheric carbon dioxide (CO2) levels, such that without this biological uptake it is estimated that present day atmospheric CO2 concentrations would be 200 ppm (50%) higher1. Phytoplankton blooms in the temperate and polar oceans play a disproportionally large role in ocean CO2 uptake, as well as being critical ecological events to which the migration patterns of marine animals, ranging from zooplankton to whales, have evolved2. The cause of phytoplankton blooms has traditionally been attributed to seasonal changes in ‘bottom-up’ environmental factors controlling phytoplankton division rates, such as nutrients and light3,4,5,6,7. However, seasonal changes in phytoplankton biomass (P) represented by the biomass-specific net rate of change (r) always reflect the interplay between two dominant terms, the phytoplankton division rate (μ) and the sum of all loss (l) rates (e.g., grazing, viruses, sinking):

r=1PdPdt=μ−

Hope this helps

3 0

2 years ago

Green pea plants are dominant. (G) Yellow pea plants are recessive. (g) What percentage chance is it that a yellow pea plant wou

geniusboy [140]

Answer:

25%

Explanation:

if you set up a punnett square you'll get GG,Gg, Gg, and gg. only gg would be yellow so 25%

4 0

3 years ago

What is the natural polysaccharide whose repeating structure can be symbolized by glcuaβ(1→3)glcnac, with these units connected

Nina [5.8K]

<h3>Answer;</h3>

The polysaccharide is Hyaluronic acid

<h3>Explanation;</h3>

Hyaluronic acid is a natural polysaccharide which is in the class of glycosaminoglycans that is mostly found in neural, connective and epithelial tissues in human body.
Hyaluronic acid is made up repeating units of glucuronic acid and N-acetylglucosamine that are joined by alternating β- 1,4 and β- 1,3 glycosidic bonds.
It is a linear polysaccharide and is the only glycosaminoglycan that lacks sulfate atoms in its structure.

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3 years ago

Name three resources for which organisms might compete. (0.6 pts)

Rashid [163]

Hi!

Organisms might compete for food, pH, territory, and water.

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3 years ago

Increased Serum Interleukin-2 Levels Are Associated with Abnormal Peripheral Blood Natural Killer Cell Levels in Patients with A

amm1812

In rheumatoid Arthritis patients, NK cell levels were abnormally elevated, possibly due to high serum levels of IL-2.

Rheumatoid arthritis (RA), is an autoimmune disease that means our own immune system attacks self healthy cells in the body by mistake, causing inflammation (painful swelling),mainly attacks the joints.

The given study is to investigate the relationship between serum interleukin-2 (IL-2) levels and disease activity.

This study also showed the relationship between absolute numbers of peripheral lymphocyte subsets, autoantibodies, and associated cytokines in patients with rheumatoid arthritis (RA).

The results showed that the number and percentage of NK cells were positively correlated with serum IL-2 levels so, IL-2 can be a reason for elevated level of NK cells

Learn more about Rheumatoid arthritis on

brainly.com/question/16920119

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2 years ago