A car is moving towards a student at constant speed. The student notices that the sound the car makes gets louder and louder
as the car approaches. The student suggests that the car sounds louder as it approaches because of the Doppler effect that he
learned about in science class this week.

How would you respond to the above statement made by the student?

The student has stated a valid conclusion for his observation.

The student has drawn a poor conclusion because the car does not get
louder

The student has drawn a poor conclusion because the Doppler effect is
about frequency and not amplitude.

The student has drawn a poor conclusion because the Doppler effect is
about amplitude and not frequency,

How many trophic levels are there in the following food chain? phytoplankton - shrimp - perch - pike - osprey

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.

Consider the classification levels of a human. eukarya ,animalia ,chordata ,mammalia ,primates, hominidae ,homo ,sapiens .which is the most specific taxonomic level in the classification system above? a sapiens b homo c hominidae d primates