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patriot [66]
3 years ago
12

Which statement describes potassium-argon dating?

Biology
2 answers:
Dimas [21]3 years ago
5 0

Answer:

A.

Explanation:

did the test

Fiesta28 [93]3 years ago
3 0

Answer: Potassium-40 decays into argon gas over time.

Explanation: Potassium-argon dating is a dating method used to determine the age of sedimentary rocks by comparing the proportion of K-40 to Ar-40 in a sample of rock, and knowing the decay rate of K-40.

Potassium-40 undergoes decay following first order kinetics as given below:

_{19}^{40}\textrm{K}\rightarrow _{18}^{40}\textrm{Ar}+_{0}^1e

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11111nata11111 [884]

1. Amylase, produced in the mouth. It helps break down large starch molecules into smaller sugar molecules.

2. Pepsin, produced in the stomach.

3. Trypsin, produced in the pancreas.

I'm probably wrong. Sorry.

4 0
3 years ago
According to the PHS, a "significant financial interest" includes royalty income paid to an investigator and its disclosure is r
Snezhnost [94]

According to the PHS, the term "significant financial interest" includes royalty income paid to an investigator except if that income is from the investigator's current employing institution.

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3 years ago
Where does a photoautotroph get its energy and carbon?
Illusion [34]
A photoautotroph get its energy and carbon from the sunlight and from organic material. Photoautotrophs are organisms that carry out photosynthesis. They use energy from sunlight to carry out cellular processes. Hope this answers the question.
3 0
3 years ago
Like all cells, the neurons' internal organization dictates its function. Neurons have relatively many mitochondria, an extensiv
4vir4ik [10]

Answer:

Neurons have stable, relatively unchanging internal environments.

Explanation:

Neurons or nerve cells is the structural and functional unit of the nervous system. Neurons consists of the dendrites, axon, cell body and different cell organelles.

The neurons have mitochondria that meets the high ATP requirement and and consume more oxygen. The network of rough endoplasmic reticulum and ribosomes produce large number of proteins in neuron. The internal environment is never stable and gets changed as the nerve impulse transmission occur through the neuron. The membrane potential of the neuron gets changed and changes its internal environment.

Thus, the correct answer is option (B).

5 0
3 years ago
Which products result from carbohydrate metabolism?
a_sh-v [17]

Answer:

pyruvate and acetyl-CoA

Explanation:

The first step of respiration reactions is glycolysis. When glucose is broken down in glycolysis, the first molecule that is produced is pyruvate. If pyruvate continue to aerobic respiration, it must enter the matrix of mitochondria and be oxidised to Acetly Co-A.

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