Hemophilia is caused by

: a recessive allele on the x chromosome

: an extra copy of a chromosome

: a missing copy of one chromosome

: codominant alleles for the trait

Use the phylogenetic tree to the right to determine which statement below is true. organisms a and f are not related. organism e is more closely related to organism b than organism f. organisms c and d are more closely related than organisms a and b. phylogenetic trees

If there are 350 trout found in 200 square feet of a pond measuring 1000 square feet what is the estimated trout population of the pond? a. 1350 b. 1550 c. 1750 d. 2000

Everything that surrounds a particular organism