What is metabolism?
the process by which cells break down molecules into smaller units and release energy
the process by which cells divide in the environment
the process by which cells use and create molecules necessary for life
the process by which cells construct new molecules from smaller units

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.

In the context of the neural impulse, which of the following is true about the depolarization of neuron membranes?

How does the study of genetic disorders such as pku biologists understand normal alleles?