On the geologic time scale are marked by major, striking, and worldwide changes in the type of fossils present.
a.
eras
c.
epochs
b.
periods
d.
all of the above

Draw the structure of dna nucleotide with adenine as nitrogenous base

Awire-hair terrier and a smooth-hair terrier are mated. the offspring produced are 6 wire-hair puppies and 2 smooth-hair puppies. a. what pattern of inheritance best describes this situation? b. what is the genotype(s) of the wire-haired puppies? of the smooth-haired puppies? c. what would be the expected genotype and phenotype ratios of a mating between 2 wire-haired terriers that are heterozygous?

How many types of rock can form from the rock cycle