The human immune system consists of
A) about 10,000 cells that increase rapidly to trillions when an infection takes hold.
B) the heart and blood vessels and the blood cells within the vessels.
C) about 2 trillion cells, their secretions, and the organs where they are produced and stored.
D) all of the bacteria and viruses that are normally present in our bodies plus our blood cells.
C) about 2 trillion cells, their secretions, and the organs where they are produced and stored.
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The efferent arterioles transport blood directly into the:a
afferent arterioles. b. Bowman's capsule. c. glomerulus. d. peritubular capillaries. e. renal artery
If a bacterium regenerates from an endospore that did not possess any of the plasmids that were contained in its original parent cell, the regenerated bacterium will probably also _____
A) lack antibiotic-resistant genes B) lack a cell wall C) lack a chromosome D) lack water in its cytoplasm
Flagellates, amoebas, apicomplexans, and ciliates are all what type of protist?
A) slime molds B) protozoans C) dinoflagellates D) seaweeds
If you were to design a novel hydrophobic protein, which type of monomers would be most essential to incorporate in the molecule in order to achieve the desired result?
A. Purine-containing deoxyribonucleotides B. Amino acids with charged side chains C. Amino acids with nonpolar side chains D. Hydrophobic nucleic acids E. Polar amino acids