Which of the following is true concerning the earth's geologic plates? a. they move b. they are affected by the earth's weather c. they are affected by climate change d. they don't move

Astudent is looking through a microscope at some cells of an onion root tip. many of these cells are undergoing division since the root tip grows quickly and requires more cells. which cell most recently underwent metaphase? w x y z

Which statement best describes the relationship between an allele and a gene? question 1 a. an allele is a variation of a gene that can be expressed as a phenotype. b. an allele is the part of a gene that attaches to messenger rna molecules. c. an allele is a segment of a dna molecule that controls replication of a gene.

In this experiment, the was intentionally manipulated. it is the independent variable. the dependent variables that were measured were the