In the early days of germ theory, contagious diseases were thought to be caused by fungi or bacteria. in the 1890s, dmitri

ivanovski filtered extracts from diseased tobacco plants and discovered that the disease could be transmitted to new plants

through the filtrate. he concluded that the disease was caused by particles smaller than bacteria: the tobacco mosaic virus.

which best explains how ivanovski's work led to a change in the germ theory?

he tried to promote his hypothesis as a law.

he used a new experimental method to test his hypothesis.

he used a more powerful bacterial strain than other scientists had.

he obtained results that confirmed what other scientists were thinking

A17-year-old primigravida is admitted in early labor. her cervix is 2 to 3 cm dilated and 100% effaced. the fetus is cephalic, and the presenting part is at –1 station. her membranes are intact. the patient is holding her boyfriend's hand tightly and breathing rapidly with each contraction. she tells the nurse in a shaky voice, "i'm so nervous. i've never been in a hospital before. i don't know anything about labor or if i can do this." what is an appropriate nursing diagnosis for this patient?

Trilobal fibers were found on kidnapping victim. which of the following fibers would most likely to be trilobat? a. cotton b. nylon c. wool d. silk me

4.06 hc)a five-year review of threats to the southern resident orca population of the united states concluded that the top threats were prey availability, contaminants, and effects from recreational and whale watching vessels. further down the list are oil spills, disease, and effects from commercial vessels not targeting whales. how might this list be different if it were for transient whale populations, which have a larger average population size and live farther offshore in open waters? a)the transient population is more likely to be affected by contaminants. b)the transient population is less likely to be affected by whale watching vessels. c)the transient population is more likely to be affected by disease. d)the transient population is less likely to be affected by prey availability.