B. Obama was the nation's first African-American president.
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Answer:
Sand dune formation
Explanation:
Glaciation needs a cold environment to happe, so sand dune formation would not be likely to occur in a cold place.
Answer:
Genetic engineering is the process of using recombinant DNA (rDNA) technology to alter the genetic makeup of an organism. ... Most often, a gene from another species is added to an organism's genome to give it a desired phenotype.
Explanation:
MARK AS BRAINLEST!!
Answer:
ummmm not any species. maybe experimenting with plants or something. but you shouldn't interfere with animal life.
Explanation: they could die or get seriously ill from it
Answer:
C
Explanation:
Jonas Salk developed a vaccine that almost eliminated Polio as a threat. Whole buildings prier to his time were devoted to housing the victims of Polio (one of whom was FDR) who had to make their skeletal systems work with the new restrictions.
The answer is C