Why must everything but the independent variable stay constant?
A. since a graph can only hold one variable
B. each group should be completely different to do an experiment
C. because you can only record information for one experimental
group
D. because with too many variables you can't determine what
caused the results

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.

The activity of the modern sample is 1.10 bq . how long does that measurement take?

Select the correct answer from each drop-down menu proteins are