Planaria are flatworms that are found in shallow streams, often attached to the bottoms of
rocks. A class is studying a population of planaria in a nearby shallow stream. The graph
below shows data collected over 11 weeks.
After 5 weeks, the population decreased, and students concluded that the stream did not have
enough food to support a large population of planaria. If the trend continues, how many
planaria will be living by week 12.
A)600
B)500
C)400
D)300

What is the mrna strand that would be copied from this dna strand

Compare and contrast the adaptations of free-living flatworms and parasitic flatworms

The construction of phylogenetic trees is a mapping out the proposed divisions and common ancestors of all living species. traditionally, these trees have been built using morphological data, such as appearance and embryology. recently, it has been possible to construct these trees using molecular data. phylogenetic trees based on different types of information agree with each: that there is strong evidence of a real underlying common descent. this phylogenic tree is composed based on molecular data (rrna). what statements can we infer are true about the organisms throughout the tree? because the tree is rooted, all branches share a common ancestor. all organisms have some sort of cellular structure/organization. all eukaryotes evolved from bacteria. since the organisms contain rna, they share the same dna. if the organisms contain rna, the share the same four nitrogen bases.