Avery, macleod, and mccarty (1944) demonstrated that dna was the genetic material by treating heat-killed streptococcus pneumoniae s (smooth) strain with dnase, thereby preventing transfer of the "transforming substance" from the killed s strain to the live r (rough) strain when the two were mixed together and injected into mice. another way that one could demonstrate transformation in bacteria would be to extract dna from:

How many trophic levels are there in the following food chain? phytoplankton - shrimp - perch - pike - osprey

Listed in the item bank are some key terms and expressions associated with the categories seen in the venn diagram. to find out more information about items, some have more details available when you click on them. drag and drop each item onto the proper area of the diagram. if an item describes more than one category, be sure to place it in the overlapping space. viruses are tiny infectious pathogens that cause many different diseases, such as polio, and the flu. though they are similar to one celled organisms in some ways, in many ways they are very different. use the venn diagram below to show the similarities and differences between viruses and living organisms.

Explain how ancient whale fossils found in eqypt are believed to support the theory of evolution.