Point source pollution comes from sources that are___? A. Directly identifiable
B. Basically unknown
C. Very small
D. Dumped illegally

Adistinctive characteristic of mammals that is not observed in other vertebrates is

Some steps in cell division are shown below: 1. chromosomes condense and pair up 2. segments of dna of sister chromatids twist and cross 3. exchange of dna occurs between chromosomes 4. four daughter cells are created that are haploid which of the following steps is least likely to occur during meiosis 1?

Through wich tissue do sugar get transported to reach the leaves during growth and reproduction