Whatever their specialty, marine biologists must have knowledge in biology, chemistry, physics, geology, and ecology. They need active learning and listening, critical thinking, complex problem solving, speaking, and writing skills.
Here's the lowdown: Flea collars do kill fleas. However they do it slowly. It takes about 4 days for a flea collar to kill a flea. In that amount of time, the flea has laid about 400 eggs. Then mom and dad flea die.Now 2 weeks later 400 newly hatched fleas jump onto Fido or Mittens. The flea collar again kills the newly acquired fleas....in another 4 days.ere's the lowdown: Flea collars do kill fleas. However they do it slowly. It takes about 4 days for a flea collar to kill a flea. In that amount of time, the flea has laid about 400 eggs. Then mom and dad flea die.
FRONTLINE PLUS is a flea treatment for dogs and cats that will spread over the coat of your pet within 24 hours and continue to be effective for one month.