Ascientist is using sonar to map the ocean floor while traveling on the ocean surface in a ship. she observes that the first sound pulse returns from the ocean floor much more quickly than the second sound pulse. what can she conclude based on this information?

Grasses--> mice--> cats--> coyotes suppose 10,000 units of energy are available at the level of the grasses. what is the total number of energy units lost by the time energy reaches the coyote?

How many bones are there in the human body?

Brian has a medical condition called cone dystrophy, which is a disorder of the cone cells in the eye. what symptoms would you expect brian to have? a. inability to see in the dark b. difficulty determining colors c. difficulty determining shapes and outlines d. inability to see in all light conditions