What is a pathogen that shows no life sign outside another cell?

The phylogenetic tree illustrates the relationship between humans and our closest living relatives. the tree was based on biochemical comparisons, including dna and amino acid sequences. according to the biomolecular data, we could infer that a) the four organisms do not have a common ancestor. b) humans are more closely related to chimps than any other apes. c) chimps are more closely related to gorillas than they are to humans. eliminate d) there is no evidence if any relationship between the four branches on the tree.

In the diagram below, the northern hemisphere would be in what season at position a a. fall b. winter c. summer d. spring

Which of the following particles always has a positive charge? a. electronb. neutron c. proton d. ion