Explanation:
<h3>Question:-</h3>
When people run long distances, their muscles require increased amounts of oxygen. Which system is responsible for carrying this oxygen to the muscles?
<h3>Answer:-</h3>
Respiratory System.
Did you Know?
Haemoglobin is the pigment of our blood to give red color.
Hope it helps ☃️
Answer:
concentration gradient
Explanation:
concentration refer to number of ions on either side of membrane
gradient :difference in concentration on both sides of membrane
on this basis:
one side of membrane: higher concentration of h+ ion
other side of membrane :lower concentration f h+ ions
pumps transport ions from higher concentration side to lower concentration side of membrane
The best protection from Haemophilus influenza that causes infant meningitis is administration of conjugate vaccines.
Vaccines are injections administered into body to provide protection. They are based on the principle that prior introduction to weakened or killed from a microorganisms produced natural immunity against it which is remembered by the body by memory cells.
The conjugate vaccines are combination of weak and strong antigens which results in stronger immunity against weak antigens. The conjugate vaccine of Haemophilus influenza comprises polysaccharide of the microorganism. Strong antigen are also known as carrier proteins and in this case are either of tetanus, diptheria toxoid or its mutant toxin of diptheria.
Learn more about vaccines -
brainly.com/question/29518057
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In the 1950's biochemists stanely miller and harold urey preformed <span>an </span>experiment<span> which demonstrated that several organic compounds could be formed unplanned by simulating the conditions of the Earth's early atmosphere.</span>
My best answer would be A) Cnidarians
