The half-life of carbon-14 is equal to 5730 years. The amount of substance with half-life h at any time t is equal to,
At = (Ao) x (1 - 0.5)^(t/h)
Substituting,
At/Ao = 0.67 = 0.5^(t/5730)
The value of t from the equation is 3310.6 years.
Answer:
For the numbers on the brain
1. Forebrain: Telencephalon
2. Forebrain: Diencephalon
3. Hindbrain
4. Midbrain
Explanation: correct
<span>It's a proposition which states that the two species competing for the same resources cannot coexist if other ecological factors are constant. When one species has even the slightest advantage. One of them will always overcome the other one which will eventually lead to extinction of the other one.
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Shrubs and trees regrow quickly in an area that has been burned during a forest fire.
Algae,grasses, and other small plants grow on newly exposed rock over a long period of time.
Answer:
Phagocytosis
Explanation:
Both macrophages and neutrophils are phagocytes, this means that they engulf large cells (up to 0.5 µm) to kill them, or small particles in order to eliminate them from the circulation.
Phagocytes can be used to acquire nutrients but their most important task is to kill invading pathogens as a part of the immune system.
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