Sherry believes that if cats are fed organic pet food,
they would be happier.
Is Sherry's hypothesis
testable?
I
Why or why not?

The population of bacteria in a petri dish doubles every 40 seconds. the population of the bacteria is initially 400 organisms. what unit is most appropriate for the time at which the number of bacteria is 300? hour bacteria per hour second bacteria per second

Identify the various levels of atmosphere. troposphere mesosphere exosphere stratosphere thermosphere

What did hunter gathers do to alter the environment?