What syndrome developes as the hiv virus infects and destroys the t cells of the immune system? a. influenza c. aids b. mad cow disease d. none of the above

Biology 1c cumulative exam i need awsners

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.

Based on the topographic map of mt. st. helens, what is the contour interval of the volcano about height is 2,950 m?