The mitochondria and chloroplasts.
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Answer:
4.54 billon years
Explanation:
the earliest time that life forms first appeared on Earth is at least 3.77 billion years ago possibly as early as 4.28 billion years
A radioactive element is an element which is subject to spontaneous degeneration of its nucleus followed by the emission of alpha, beta and gamma particles. All elements with atomic numbers greater than 83 are radioactive.
The given phrases that describe radioactive elements are-
They have a consistent number of particles
- the particles are alpha, beta and gamma particles.
They have a half-life that determines their rate of decay.
Explanation for other options:
Not all elements occur in nature. Radioactive decay rates may not be constant as the decay happens when a radioactive substance emits a particle. It is not possible to predict exactly when a given atom of a substance will emit a particular particle. When the radioactive element release energy and particles, it decays.
Answer:
B. They sold 120 student and 30 adult tickets.
Explanation:
120 x 12 = 1,440
30 x 20 = 600
1,440 + 600 = 2,040.
The
response is false. Evolutively, thought is the last to develop,
therefore, it is the most plausible element to be modified and, in
this process of change, emotions<span> will accompany.</span>
