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RoseWind [281]
2 years ago
6

Which of the following was an important development during the Paleolithic period? A. The first civilizations appeared during th

e Paleolithic period. B. Humankind became food producers rather than collectors. C. Humankind developed iron-working technologies. D. Humankind spread to inhabit all parts of the globe.
Social Studies
1 answer:
nata0808 [166]2 years ago
4 0

Answer:

D. Humankind spread to inhabit all parts of the globe.

Explanation:

Paleolithic humans were nomads, so they moved from place to place when they were running out of food. This led to a big spread of humankind from Africa to Eurasia, the Southeast region of Asia, and Australia. Afterward, they started inhabiting Europe to finally reach America from North to South.

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Professor Pholman is lecturing about the reflex arc. He tells his students that _____ in the ______ help coordinate contraction
Anastasy [175]

<em>Answer:</em>

<em>a. motor neurons; peripheral nervous system                                            </em>

<em>Explanation:</em>

<em>Motor neurons:</em><em> It is also referred as "motoneuron" and is described as a neuron whose "cell body" is generally located in the "motor cortex", "spinal cord", and the "brainstem" and its axon or fibers are projected towards an individual's spinal cord and outside his or her spinal cord in order to control glands, muscles, and effector organs directly and indirectly.</em>

<em>Peripheral nervous system:</em><em> It is considered as including every different nerve in an individual's body that is located outside his or her brain and the spinal cord. The mentioned nerves carry specific information from and to the "central nervous system" and therefore provides various complex "body functions".</em>

<em />

5 0
2 years ago
At railroad crossings, you must stop at least _____ from the nearest rail if a flagger is warning of an oncoming train.
Studentka2010 [4]

Answer:

The correct answer is: 15 feet

Explanation:

The railroad crossing, also known as the level crossing, refers to the intersection of a road and railway line. Generally, an employee of the railroad called the flagman, indicates the approaching train by waving a red colored flag or lantern to clear the railway tracks and stop the traffic.

<u>When signaled by the flagman, you should stop </u><u>at least 15 feet</u><u> from the nearest railway track.</u>

7 0
2 years ago
Stress hormones at the time of learning _____ new memory formation; the presence of stress hormones at the time of recall _____
IrinaVladis [17]

Answer:

Stress hormones at the time of learning __<em>interferes</em>___ new memory formation; the presence of stress hormones at the time of recall _<em>impairs</em>____ retrieval of older memories.

Explanation:

When stressed, the human body produces some stress hormone. Some of these hormones can affect certain parts of the brain, interfering with the encoding of new memory,  and inhibiting the recall of long term or older memories. An example of a stress hormone responsible for negatively affecting long-term, delayed recall memory is the cortisol, and the effect is usually felt at the hippocampus, prefrontal cortex and the amygdala.

7 0
2 years ago
The portion of Earth underneath the crust containing the asthenosphere and the mesosphere is the ________.
Paladinen [302]

Answer:

Indeed

Explanation:

4 0
2 years ago
Read 2 more answers
Three factors that lead to human error in the human factors theory are which of the following? A. Overload, inappropriate respon
damaskus [11]

Answer:

option A

Explanation:

The correct answer is option A

Three factor that lead to human error is Overload, inappropriate response, and inappropriate activities.

Overload of work can make human error because due to overload and stress the engagement of employee decreases which reduces productivity.

Inappropriate response can also cause human error because if there is no proper response for the team member then this will lead to confusion so, productivity will again decrease.

Inappropriate activities leads to human error because focus of the employee shifts.  

5 0
2 years ago
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