Prediction: if the height of an adult mustard plant is determined by the weight
of the seed it grew from, then heavier mustard seeds should grow into taller
plants when temperature, water, and soil are controlled.
which of the following best describes this prediction?
o
a. the prediction is useful because it proves that the hypothesis is
true before any data have been collected.
o
b. the prediction is useful because it explains what observations will
be made if a hypothesis is true.
o
c. the prediction is not useful because scientists are skeptical of
anyone who claims to see into the future.
o
d. the prediction is not useful because it has not yet been peer-
reviewed by other scientists.

Which of the following is not a benefit of green revolution? a) new crop varieties b) increased crop yields c) cost effective d) new crops may require larger amonts of water than the previous ones.

In 1959, doctors began using the powerful antibiotic methicillin to treat infections of staphylococcus aureus, but within two years, methicillin-resistant strains of s. aureus (mrsa) appeared. how did the resistant strains of s. aureus emerge? in 1959, doctors began using the powerful antibiotic methicillin to treat infections of staphylococcus aureus, but within two years, methicillin-resistant strains of s. aureus (mrsa) appeared. how did the resistant strains of s. aureus emerge? staphylococcus aureus bacteria that were able to synthesize cell walls using a protein that was not affected by methicillin survived the methicillin treatments and reproduced at higher rates than did other individuals. over time, these resistant individuals became increasingly common. in response to treatment of staphylococcus aureus infections with methicillin, some bacteria began to synthesize cell walls using a protein that was not affected by methicillin. these bacteria survived the methicillin treatments and reproduced at higher rates than did other individuals. over time, these resistant individuals became increasingly common. in response to treatment of staphylococcus aureus infections with methicillin, bacterial populations gradually began to synthesize cell walls using a protein that was not affected by methicillin.

What is the ecological role of food chains and food webs