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which of these contains a single, long dna

a. nucleotide
b. chromosome
c. deoxyribose
d. gene

Place the steps tor the formation of the enzyme pepsinogen in correct order

Radiometric dating is used to tell the absolute age of materials by studying the decay rate of radioactive isotopes. the decay rates of isotopes are constant and are expressed as .

The illustration shown is an ovum, a female sex cell. a mutation in this cell may be passed to the woman’s offspring during a) birth. b) mitosis. c) dna replication. d) sexual reproduction