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4 years ago

Which best describes radiometric dating?

Biology

2 answers:

melisa1 [442]4 years ago

7 0

i think the correct answer is B

its the action in that a radioactive isotope tends to break down into a stable isotope

DIA [1.3K]4 years ago

3 0

The answer is; B

Rocks have naturally occurring and spontaneously radioactive atoms in them, such as carbon-14. These element isotopes decay into other types of atoms over millions of years. Therefore, by measuring the amount of these radiometric substances, and knowing the half-life of the isotopes, it is possible to postulate the age of a rock to within certain ranges of error.

You might be interested in

How is earth like a system

bazaltina [42]

Answer:

Earth is a dynamic planet; the continents, atmosphere, oceans, ice, and life ever-changing, ever interacting in myriad ways. These complex and interconnected processes comprise the Earth system, which forms the basis of the scientific research and space observation that we refer to as Earth system science.

Explanation:

8 0

3 years ago

Which is an example of temporal isolation?

Ivan

One species is nocturnal, and the other species is not.

http://quizlet.com/51808791/biology-1407-ch-24-flash-cards/

8 0

4 years ago

All of the following fish choices have high levels of the toxin mentioned in the video except for __________.

andrezito [222]

Answer:

Option 2, Salmon

Explanation:

Large fishes such as shark and sword fish have higher level of mercury. This fact can be explained by the concept of bio magnification in which an individual lying at a higher trophic level in a food chain gets accumulated toxin and hence possess the highest amount of toxin in a given food chain. Small fish such as salmon will have the lowest amount of mercury as they lie at the lower level of a food chain and hence possess a small amount of toxin

6 0

4 years ago

Name each numbered stage in the plant cell cycle diagram:

zheka24 [161]

Answer:

1. Metaphase

2. Prophase

3. Telophase

4. Interphase

5. Interphase

6. Interphase

7. Anaphase

8. Interphase

9. Telophase

10. Metaphase

11. Interphase

12. Interphase

13. Interphase

14. Interphase

15. Prophase

16. Interphase

17. Metaphase

18. Anaphase

19. Interphase

20. Interphase

21. Prophase

22. Interphase

Explanation:

The cell cycle is divided into two main divisions. The Interphase ad the M phase or the Mitotic phase.

Throughout Interphase, the cell is not dividing yet, but it is preparing to divide. It synthesizes the nutrients it will need, and grows in preparation to become two cells. This is actually the phase the cell spends the longest time.

Mitotic phase is when the cell starts to divide. It is separated into:

Prophase:

In this phase the chromosomes are condensed and mitotic spindles start to form. These spindles are made up of microtubules that will help later on to split the chromosomes. The nuclear membrane disappears so that the chromosomes will be free to move.

Metaphase

This phase is marked by the alignment of the chromosomes in the middle of the cell. They line up and you will find the asters at the opposite ends of the cell, where the microtubules stem from, attaching themselves to the center of the chromosomes, which we call the kinetochore.

Anaphase

In this phase you will see that the chromosomes are separated by the spindle fibers and are pulled at opposite ends of the cell. The cell then becomes longer by the other spindle fibers that are not attached to a chromosome.

Telophase

This phase is the end phase. The two sets of chromosomes are then enclosed by new nuclear membranes forming two nuclei and other cellular structures just as the cells are about to separate completely. As the two new cells move further apart, in plant cells a cell plate forms, dividing the two cells. The movement of the two cells splitting apart is called cytokinesis and it happens just as mitosis is about to end.

Attached is a picture of the cell cycle of a plant cell.

4 0

3 years ago

HELPPPPPPPPPPPP MEEEEEEEEEEEEE PLLLLLLLZZZZ I REALYY NEED HELP ASAP LIKE PLZZZZZZ HELP MEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE

prisoha [69]

"B", or Halter broken is the correct answer for this question.

I hope that I helped you! Good luck :)

3 0

3 years ago