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Helga [31]
3 years ago
10

The combination of absolute and relative dating allows scientists to determine the ages of rocks and fossils. Absolute dating pr

ovides evidence that helps us estimate the ages of Earth. How can scientists find the absolute age of igneous rocks?
Biology
1 answer:
DiKsa [7]3 years ago
7 0

Answer:

By radiometric dating

Explanation:

The relative age of a rock sample is determined by comparing a  (or the fossils it contains) to other layers. Relative age of a rock sample can be determined by looking at the position of various rock layers.

Absolute age of a rock sample is the numerical.  Absolute age can be determined by using radiometric dating.

According to Oxford dictionary, radiometric dating is "a method of dating geological specimens by determining the relative proportions of particular radioactive isotopes present in a sample."

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Almost immediately after injection, you find yourself swept into a good-sized chamber, the _(1)_. However, you do not stop in th
Pepsi [2]

Answer:

Almost immediately after injection, you find yourself swept into a good-sized chamber, the left atrium. However, you do not stop in this chamber, but continue to plunge downward into a larger chamber below. You land with a large splash and examine your surroundings. All about you are huge white cords, hanging limply from two flaps of endothelial tissue far above you. You report that you are sitting in the left ventricle chamber of the heart, seeing the flaps of the mitral valve above you. The valve is open and its anchoring cords, the chordae tendineae, are lax. Since this valve is open, you conclude that the heart is in the systole/contraction phase of the cardiac cycle.

Explanation:

Once the oxygenated blood enters the heart through the pulmonary vein, it goes to the left atrium. From there, it goes down to the left ventricle passing through the mitral valve, also known as the bicuspid valve. This valve prevents blood's backflow when the heart contracts, allowing the blood's flow from the ventricle to the aorta.

The chordae tendineae, also known as tendinous cords, are in the mitral and the tricuspid valve. They are cords that are attached to the valve and the heart walls. They are lax during atrial systole, and with the help of blood pressure, they allow the valve to open and welcome the blood into the left ventricle. The tendinous cords are tense during ventricle systole preventing the valve from opening and causing a backflow from the ventricle to the atrium.

8 0
3 years ago
Prokaryotic cells reproduce by _______. A.binary fission B.meiosis C.cytokinesis D.mitosis
Nutka1998 [239]

The answer is binary fission.

This happens when during the replication of chromosomes of prokaryotes. Similar to mitosis, it divides itself and reproduces asexually. Many bacteria use this kind of process to produce more of this kind of organism in equal sizes.

Hope This Helps :)

7 0
4 years ago
Extinction is the term used when all members of a species
goldfiish [28.3K]
Reach a point where they die out completely
4 0
4 years ago
Read 2 more answers
Yo can someone help me out
timama [110]
B is the answer since it needs to be improved
8 0
3 years ago
Read 2 more answers
1. The diagram below shows a happy family of mice, with two parents and four offspring.
Oliga [24]

Answer:

The diagram is not attached but the question can be solved with the question alone, since the necessary information was provided.

• D. Offspring D (ff EE)

Explanation:

This is a cross involving two genes in mice. The two parents mice are crossed to produce four offsprings. The genotypes of the parents mice are FFEe (black fur) and ffEe (white fur).

These two parents will produce the following allelic combinations of gametes;

FFEe- FE, Fe, FE, Fe

ffEe- fE, fe, fE, Fe

Using these gametes in a pumnet square (see attached image), 16 possible offsprings will be produced with only three (3) distinct genotypes viz:

FfEE (4/16)

FfEe (8/16)

Ffee (4/16)

Hence, based on this question, all of the offsprings except offspring D (ffEE) is likely to be produced. This means that the offspring with genotype ffEE is the imposter as the parents mice with genotypes FFEe and ffEe could not have given birth to such offspring.

8 0
4 years ago
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