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Sunny_sXe [5.5K]
3 years ago
8

A test that determines the percentage of erythrocytes in a volume of blood:

Biology
1 answer:
Nataliya [291]3 years ago
6 0
Red blood cell count
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Identify how scientists used the scientific method to test this phenomenon.
Y_Kistochka [10]

Answer:

When conducting research, scientists use the scientific method to collect

measurable, empirical evidence in an experiment related to a hypothesis (often in

the form of an if/then statement), the results aiming to support or contradict a

theory.

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Which of these shows the correct pathway through the heart's four chambers after it enters from the vena cava?
Kipish [7]

Answer: B. right atrium --> right ventricle --> left atrium --> left ventricle

Explanation: Deoxygenated blood enters the superior vena cava and inferior vena cava and collects it on the right atrium. It is then pumped up through a valve and enters the right ventricle. Then it is transported by the pulmonary artery to the lungs to become oxygen rich blood. From the lungs oxygenated blood enters into the pulmonary vein and back into the heart and goes inside the left atrium. The blood is pumped again through a valve going to the left ventricle and transported to the body through the aorta which distributes oxygen rich blood.

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2 years ago
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Which organ is responsible for storing urine?
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The answer is bladder
The bladder stores urine and when the brain signals to release (when we have to go pee) it releases the urine through the urethra. The answer is not kidney because it doesn’t STORE the urine it filters waste and toxins in the body into the urine to be released from the body, the actual bladder itself is the organ that stores the urine in the body.
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3 years ago
What challenges do you think parasites face in their survival? How can these challenges affect the parasite?
Greeley [361]
Parasites need a host. If a host tries to get rid of the parasite or kill it, then the parasite either has to leave the body or die.
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2 years ago
Was the scientist who developed the inactivated polio vaccine.
Naddika [18.5K]

Answer:

Jonas Salk

Explanation:

  • The vaccine that is used for the prevention of polio caused due to the infection caused by the poliovirus is known as polio vaccines. 
  • The first successful polio vaccine was developed by Jonas Salk in the year 1952 and the success of the field trials was announced in the year 1955. 
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  • This vaccine was an inactivated vaccine. 
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3 years ago
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