Around 1914, ________ determined that DNA was an important component in ________ by using a staining technique that is still in use today
Fill in the blank with correct word.
Answer: Robert Feulgen; chromosomes
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Chemical compounds secreted by mammals and insects to communicate sexual readiness are called
a. pheromones. b. developers. c. hormones. d. testosterones. e. estrogens.
Many cells assemble lipids in the
a. Golgi bodies. b. mitochondria. c. chloroplasts. d. ribosomes. e. smooth endoplasmic reticula.
In the liver, carbon dioxide and ammonia are combined to form the less toxic waste product ____
a. urea b. water c. creatine d. sulfuric acid e. phosphoric acid
How are Cryptosporidium sporozoites able to evade the immune system?
A) They attach to host cells and build a protective membrane from modified host cell membrane materials. B) Special proteins bind and inhibit antibodies from adhering to them. C) They escape from phagocytes. D) They reside inside the host cells. E) They evade phagocytosis by using a capsule.