Erwin and scott used an insecticidal fog to knock down insects from the top section of a l. seemannii tree. the researchers identified over 900 species of beetles among the individuals that fell. erwin also projected that this entire tree from top to bottom is host to about 600 arthropod species that are unique to this tree species and not found on any other tree species. there are approximately 50,000 species of tropical trees. although it could not be entirely accurate, what would be the best way to estimate the total number of arthropod species?

The options to complete the question are

A. Multiply 900 by 50,000.

B. Estimate the species density and then multiply by 50,000.

C. Divide 900 by 600 and then multiply by 50,000.

D. Multiply 600 by 50,000.

The CORRECT ANSWER IS D

D. Multiply 600 by 50,000.

meteorologists would compare a new weather map with one 24 h old to see how fast a front is moving.

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.