The fourth way chemicals can enter the body is by injection. It can happen when a sharp device (like a needle) punctures the skin and injects a chemical (or virus) directly into the bloodstream, however it is unusual in most industries.
<h3>What in biology is the blood stream?</h3>
The phrase "bloodstream" refers to the flow of blood within an organism's body. In humans, the circulatory system, which is made up of a complicated network of arteries and veins, is where blood travels.
<h3>Where does the bloodstream reside?</h3>
The blood is gathered in veins and moves to the right atrium and right ventricle while being depleted of oxygen. The pulmonary circulation starts here: Low-oxygen blood is pumped from the right ventricle into the pulmonary artery, which divides into progressively smaller arteries and capillaries.
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a change in allele frequencies due to change alone, occuring mostly in small populations is called ________
The answer is
<em>Genetic Drift</em>
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Lamarck developed the theory of acquired characteristics that organisms changed during their lifetime to accommodate their environment and that these acquired characteristics became inherited in their offspring. This theory was preceded for example by Erasmus Darwin who believed that "improvements" to organisms could be passed on or inherited.
B. Isthmus
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Answer:
Rocks on land
Explanation:
The salt in the ocean comes from rocks on land.
