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BARSIC [14]
3 years ago
15

Which of the following best describes what most experts believe about Homo sapiens?

Biology
1 answer:
Oduvanchick [21]3 years ago
8 0
A. they arose out of Africa less than 200,00 years ago
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If two similar flashlights shine on a wall from the same distance, the spot on the wall becomes brighter. This is due to light w
zalisa [80]

Answer:

C) constructive interference

Explanation:

  • <u>The flashlights that shine in the wall form the same distance and the spot on the wall becomes brighter is due to the wavelength of the two waves.</u>
  • The clashes simultaneously on the same direction and with the same intensity and distance thus creating a more bigger impact. And is said to have a high frequency due to their interaction.
5 0
2 years ago
Read 2 more answers
Compare the arrangement of muscles in earthworms to amphioxus
mafiozo [28]

Earthworms have two muscles which is used in locomotion. Both muscles are circular and longitudinal (inner layer of the series of muscles). The diameter of the earthworms body is reduced when the circular muscles are contracted which makes them appear to be thin. The worm appears short when the longitudinal muscles contract thus, its length is reduced.

 

Amphioxus on the other hand,  have two unique muscle fiber types. This includes  deep fibers and smaller but mitochondria-rich superficial fibers. E<span>ach of which has its own innervation.</span>

6 0
3 years ago
How would an x-ray technician position the camera to produce a frontal view of a patient's abdominal cavity?
leva [86]

Answer: Option A. "In front of the patient, pointing at his navel"

Explanation:

The X-ray of abdominal cavity is known as Abdominal x-ray. It has same principle as X-ray and uses ionizing radiation to take pictures of inner parts of abdominal cavity such as intestine, stomach, liver and spleen. it is used to diagnose patients with vomiting, unexplained pain, and nausea.

While diagnosing  patient's abdominal cavity, x-ray technician position the camera in front of the patient, pointing at his navel in order to produce a frontal view of abdominal cavity.

Talking about a x-ray machine, it is a compact apparatus which can be taken to the patient in a hospital bed or the emergency room. The x-ray tube connects flexible arm which further extends towards the patient and an x-ray film holder (image recording) plate is placed under the patient.

The technologist will ask the patient to take position on the x-ray table or bed and will position x-ray machine over the abdominal area of the patient, in order to take the frontal view of abdominal cavity. The patient will be asked to hold their breathe to get a clear picture. The technician will turn on the x-ray machine that allows  x-ray machine  to produce a small burst of radiation which passes through the abdominal area and records the frontal view of  patient's abdominal cavity. As a result, soft tissue shows up in shades of gray and air appears black while bones appear white on the x-ray, through which patient can be diagnosed.

Hence, the correct option is A "In front of the patient, pointing at his navel".

8 0
3 years ago
How does air move in a high pressure system? *
GarryVolchara [31]
It slowly gets compressed so I guess you can say it moves slowly as the space gets compressed
6 0
2 years ago
The lines of latitude are located east and west of the prime meridian. True or false
lisabon 2012 [21]
The answers is false
8 0
3 years ago
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