Question 10 5 pts
Which is the best example of a pure substance?
blood
oxygen
petroleum
milk
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Many farmers prefer cattle without horns because it is safer for their herds. the allele for no horns (n) is dominant to the allele for the presence of horns (n). a farmer mates a male with horns to a heterozygous female without horns. what is the chance that the offspring will have horns?

Environmental science are unconsidered with methods to preserve natural resourcesa. trueb. false

What type of appendages do sponges cnidarians roundworms annelids mollusks arthropods echinoderms and vertebrate have? jointed, not jointed, absent