As prey species evolve more effective means to avoid being caught, predators evolve more effective means to capture them
Indicate whether the statement is true or false
TRUE
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Peptidoglycan forms sheets that stiffen the cell walls of bacteria. How is the formation of sheets possible?
A) The polysaccharides in peptidoglycan are highly branched and form a network. B) The glycosidic linkages between monosaccharides in peptidoglycan are extraordinarily strong. C) Individual strands are joined by peptide bonds, a type of covalent bond. D) The polysaccharides in peptidoglycan form helical structures, as in cellulose.
Which of the following public health methods impacted the quality of life through the 20th century by lowering the incidence of many infectious diseases?
A. Water treatment B. Antimicrobial agents C. Immunizations D. Strict sanitation guidelines E. All of the choices are correct.
The earliest upright ________ were in a group called australopithecines
Fill in the blank(s) with correct word
Which of the following were instrumental in DISPROVING spontaneous generation?
a. Pasteur's experiments using a specialized swan-necked flask that prevented microbes from entering flasks open to the air. b. The theory set forth by Rudolph Virchow, stating that living cells arise only from preexisting cells. c. Needham's experiments showing that even boiled vials of meat broth, when covered, became cloudy, teeming with microorganisms after a few days. d. Spallanzani's experiment in which flasks of meat broth were boiled and then melted shut, preventing the passage of air altogether.