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harkovskaia [24]
3 years ago
11

_____ developed the concept of half-life.

Biology
1 answer:
Sveta_85 [38]3 years ago
7 0
Ernest Rutherford was responsible in suggesting the concept of half-life. During the time of his discovery in 1907, it was termed 'half-life period' - later on shortened to half-life in the 1950s.
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When an environmental stimulus is received, the signal is usually transmitted through three types of nerve cells. In which order
Alexeev081 [22]

Answer:

The correct answer is - sensory neurons → inter-neurons → motor neurons.  

Explanation:

The nerve system receives a signal from the external change or stimuli and transmitted it to the spinal cord and brain. The transmission of the signals or information is carried by three different types of nerve cells: sensory neurons, interneurons, and motor neurons.

Sensory neurons receive the signal from the external stimuli and converting it to the electrical impulses. Interneurons are the associative neurons that establish the connection between sensory neurons and motor neurons. Motor neurons are the efferent nerves that carry the signal from interneurons and brainstem or spinal cord and transmit to the muscles.

Thus, the correct answer is - sensory neurons → inter-neurons → motor neurons.

5 0
3 years ago
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anastassius [24]

Answer: B)The continents were once connected.

Explanation:

There was probably some kind of earth quake or drift in the plains/plates causing the land to break into pieces and separate

3 0
3 years ago
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BartSMP [9]

Answers are in bold.

1. Energy from the sun is transferred to Earth's surface. Some of that energy is then transferred to the air above the surface.

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3. An effect may have more than one cause. These may be linked into a chain of causes and effects.

<em>I would appreciate brainliest, if not that's ok!</em>

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7 0
2 years ago
What must be true for natural selection to happen?
Tems11 [23]

Answer:

D

Explanation:

Because there has to be competition or one population wouldnt decrease and the other wouldn't increase due to survival and reproduction the population doesn't always have to be below the carrying capacity because it can also do it when its above and natural selection can act on traits determined by different alleles.

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