How does the body protect itself from these invaders?
a. the immune system kills or dis...
How does the body protect itself from these invaders?
a. the immune system kills or disables the invading organisms.
b. the respiratory system surrounds the invaders with carbon dioxide.
c. the respiratory system removes invaders from the blood.
d. the immune system collects and stores the invading organisms.
Answers: 2
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Describe the response the kidneys have to dehydration and excessive water intake. what happens to the concentration of urine in each case ?
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Some steps in cell division are shown below: 1. chromosomes condense and pair up 2. segments of dna of sister chromatids twist and cross 3. exchange of dna occurs between chromosomes 4. four daughter cells are created that are haploid which of the following steps is least likely to occur during meiosis 1?
Answers: 1
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