Answer:
After 6000 years, approximately 500 atoms of carbon-14 will be left in the femur bone of an animal which had 1000 atoms of carbon-14 when the animal died.
Explanation:
The half-life of a radioactive isotope of an element is the time taken for half the atoms present in a given amount of the element to undergo decay or disintegration. For example, the half-life of carbon-14 isotope is 5730 years. This means that, if there are 100 atoms of carbon-14 present in a given sample of a material, in the next 5730 years, approximately, 50 atoms of carbon-14 will be left in the material.
Since the half-life of radioactive isotopes are constant, these radioactive isotopes are used in the determining the ages of ancient life-forms as well as rocks.
In the given example, after 6000 years, approximately 500 atoms of carbon-14 will be left in the femur bone of an animal which had 1000 atoms of carbon-14 when the animal died.
I believe that it's an exhausted bear. Cellular respiration is the way plants and animals receive energy. If the bear is exhausted, it means it's cellular respiration is lacking.
The energy source that is described in the image is light energy from the sun. The correct option is A.
<h3>What is chloroplast?</h3>
Chloroplast is a cell organelle that contains chlorophyll and aids in the process of photosynthesis in the presence of sunlight using carbon dioxide and water.
The missing image of the question is attached as an image.
The energy source that is described in the image is light energy from the sun.
Thus, the correct option is A.
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Answer:
light energy
Explanation:
Plants take in sunlight given off by the sun to make food during photosynthesis
1.cell membrane
2.Cell startation
3.cell fusion
4.cell reconstruction
5.tissue replacement
6.red blood cells
