A human DNA sequence is amplified by PCR in a population sample, and we observe five different alleles of 220 bp, 224 bp, 228 bp, 232 bp and 236 bp in length. This sequence is an example of a (choose one):
O 1.DNA profile
2. Minisatellite
O 3. SNP
4. Short tandem repeat (STR)

Awater molecule is polar because there is an uneven distribution of these between the oxygen and hydrogen atoms.

Indicate whether the following statements about the biases in the fossil record are true or false. a) inland species are more likely to be preserved than marine species b) organisms with hard body parts are more likely to be preserved than are those composed soft tissues. c) species that existed over a larger area are more likely to be preserved than species existing over a smaller area. d) organisms that lived very long ago are more likely to be found as fossils than organisms that lived relatively recently e) the fossils of larger organisms are more likely to be found than the fossils of smaller organisms

As a small change in a person's dna can cause a genetic disorder