Population density is calculated by
a. dividing the number of organisms in a region by the land area
b. multiplying the number of organisms in a region by the land area
c. dividing the land area by the number of organisms in the region
d. by subtracting the land area from the number of organisms in a region

Which of the following statements most accurately describes convergent evolution? the process in which two similar species evolve separately from each other and share similar characteristics the process in which a single species evolves into two or more new species the process in which two entirely different species evolve in response to each other the process in which two different species evolve separately from each other but still share similar characteristics

Hemoglobin is a proton that carries oxygen around your body what is hemoglobin made from

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?