Isotopes of the same element have different
a) positions on the periodic table
b)chemical behavior
c) atomic numbers
d)mass numbers

Will someone me with this.. specialized cells which perform a particular function form: tissues organs or organism

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

Which of the following types of rock would most likely contain a fossil? slate granite lava rock limestone