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svetoff [14.1K]
4 years ago
8

In a process called radiometric dating, scientists measure the __________ of an isotope to determine the age of the earth

Biology
2 answers:
loris [4]4 years ago
4 0
The answer is: fixed decay rate!
EleoNora [17]4 years ago
3 0

Answer:

In a process called radiometric dating, scientists measure the fix decay rate of an isotope to determine the age of the earth.

Explanation:

In the process of radiometric dating we can find the age of fossils, how long the rocks formed and fossils contains within those rocks. Radiometric is very accurate to date the earth, and radioactive decay of unstable isotopes like uranium, carbon and potassium that are slow to decay.  

Scientist measures the fixed decay rate during the radioactive decay, it happens when an unstable atomic nucleus continuous changes to lower energy state and splits the radiation.

 

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Sophie says dolphins and sharks look very similar so they must be related Jake disagrees says dna evidence has shown that the do
anyanavicka [17]

Answer:

Jake is correct.

Explanation:

Sophie is wrong because although dolphins and sharks can technically be said to be similar, it resulted from convergent evolution, which has nothing to do with common ancestry and rather to do with similar environments for their homes.

6 0
3 years ago
How could a populations gene pool change overnight time?
NeTakaya
A mutation could do that.
6 0
4 years ago
the first cells likely to encounter a pathogen, such as phagocytes, are professional antigen presenting cells (apcs). this means
Zepler [3.9K]

Professional antigen-presenting cells, such as phagocytes, are the first cells to encounter a pathogen (apcs). This means they have the ability to activate cells of the adaptive immune system.

<h3>What is meant by Pathogen?</h3>
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  • Pathogens include viruses, bacteria, unicellular and multicellular eukaryotes, and a wide range of other organisms.
  • The bone marrow of an average healthy adult generates 100 billion new neutrophils per day. Because there are so many neutrophils in the body at any given time, they are often the first cells to reach the site of an infection.
  • Long thought to be a component of the innate immune system, complement has recently emerged as an important regulator of the adaptive immune response.

Therefore the correct option is D)  can activate cells of the adaptive immune system.

To learn more about Pathogen, refer to:

brainly.com/question/1008643

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8 0
1 year ago
Describe how the structures of proteins differ from the structures of carbohydrates (150 words)
Veronika [31]

well both are considered macromolecules. proteins are like big lego construction. each single piece gets pieced together to make a larger thing. each single piece is a monomer, and the larger construction is the polymer. the monomers are called amino acids and they get pieced together to form the polymer which is called a protein. the linkage that they use is an amide bond, and in biology it is usually called a peptide bond. carbohydrates can be singular monomers or polymer units. they are made of completely different compounds usually aldehydes or ketones. and they link together through different chemical linkages (acetal or ketal linkages for polymers, hemiacetal or hemiketal linkages for monomers). both can be large, 3D strucutres proteins are only functional as a large, 3D structure, while carbohydrates can be singular. (you might wanna word it differently for safety reason)

7 0
4 years ago
What planets have no moons
ki77a [65]

mercury and venues are the only one without moons

6 0
3 years ago
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