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shtirl [24]
2 years ago
8

Which best helps scientists determine the age of fossil

Biology
1 answer:
Scrat [10]2 years ago
7 0

Explanation:

To establish the age of a rock or a fossil, researchers use some type of clock to determine the date it was formed. Geologists commonly use radiometric dating methods, based on the natural radioactive decay of certain elements such as potassium and carbon, as reliable clocks to date ancient events.

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Sarah recently learned that O2 is found in the Earth’s water bodies. She was amazed to know the proportion of O2 found in the oc
Mamont248 [21]

It has been found that the rainforests are accountable for about one-third, that is, 28 percent of the oxygen of the Earth, however, the majority of the oxygen, that is, about 70 percent in the atmosphere is generated by the marine plants. The left-over two percent of the oxygen comes from other sources.  

The majority of the oxygen comes from the tiny plants in the ocean known as phytoplankton, which lives near the surface of the water and drifts with the currents. Similarly to plants, they perform the process of photosynthesis, that is, they utilize carbon dioxide and sunlight to prepare food, oxygen is the by-product of photosynthesis.  

However, the concentration of the dissolved oxygen, which the water can hold relies on the salinity and temperature of the water. The cold water can withhold more oxygen in comparison to warm water and fresh water can hold more oxygen in comparison to salt water. So, the warmer and saltier the water is, the less will be the oxygen dissolved in it.  


7 0
2 years ago
A 57-year-old man is evaluated in the clinic for a routine physical exam. He is followed for hypertension and hyperlipidemia. He
andrew-mc [135]

Answer:

d. Measure thyroid-stimulating hormone level

Explanation:

The most suitable next step in management of this patient is to measure a thyroid stimulating hormone, or thyrotropin level.

This patient's apparent treatment refractory dyslipidemia is most likely contributed by undiagnosed thyroid disease. Despite sticking to the treatment with atorvastatin, his  LDL AND total cholesterol are raised.

Additionally, there are some clinical signals that give an idea about the diagnosis of hypothyroidism especially  fatigue and constipation.

Hypothyroidism is concerned with and is a very common secondary cause of dyslipidemia and thyrotropin level measures are indicated.

Hyperlipidemia may show better results to thyroid stimulating hormone.

Hence option D is the right answer.

8 0
2 years ago
Help plz :) <br> dyshujdheyudiokdmfj
Anna35 [415]

Answer: 30 years

Explanation: what is 30 plus 30... 60 it says he died in 1930 and discoverd the thing in 1960  add 30 boom its been 30 years

8 0
2 years ago
Translation begins when _______ in the cytoplasm attaches to a _________
AysviL [449]
When a Ribosome in the cytoplasm attaches to a mRNA molecule (I’m in 9th grade and we did this last semester so I’m pretty sure it’s right) :)
6 0
3 years ago
Evaporating water takes what with it<br> A) wind<br> B)heat<br> C)pressure<br> D)water
krok68 [10]
The answer is d or c but I think it’s b. Hope this helps!
8 0
3 years ago
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