In performing a ten-fold dilutions series from a sample containing 10,000 bacteria per milliliter, the fourth tube in the dilution series will have 10 cells per milliliter
Indicate whether the statement is true or false
FALSE
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Which of the following statements about communication in the White-Crowned Sparrow is not correct?
A. The White-Crowned Sparrow's song is an advertisement display behavior. B. The White-Crowned Sparrow's song is learned by imprinting, a sensitive period that takes place about 10–50 days after hatching. C. During the learning phase, the White- Crowned Sparrow's subsong is a sequence of unstructured twittering. D. If a tape of another species song, for example the Swamp Sparrow, is played during the sensitive period, the White- Crowned male will learn that song. E. If deprived of hearing the adult male's song during the early sensitive period, the bird will continue to sing an unstructured twittering throughout its life.
Heterotrophic bacteria are able to break down large food items
a. by ingesting them with pseudopods. b. with exoenzymes. c. by breaking them up with cilia. d. by crushing with their larger relative size. e. by using their cell membranes to pinch the food into smaller pieces.
________ can be detected through a blood test that detects a specific antigen called PSA
Fill in the blank(s) with correct word
What is the function of tight junctions?
a. to seal the spaces between cells b. to give the cell its shape c. to allow ions and small molecules to pass between cells d. to allow cells to communicate with each other