Natural selection is defined as
A.
the changes that occur in an organism over its lifes...
Natural selection is defined as
A.
the changes that occur in an organism over its lifespan.
B.
the process by which humans select the most desirable organisms in a population.
C.
the changes in the characteristics within a population that lead to survival.
D.
the changes that occur in a population that do not affect survival.
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Biology, 22.06.2019 06:30
What are examples of the plant life and animal life that can be found in each type of terrarium
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Astudy by solloch and et. al., in 2017, gives the map above which shows the frequency of alleles with a ccr5-delta32 mutations over 87 different countries. this mutation deletes the presence of a co-receptor (ccr5) on the outside of human t-cells (lymphocytes). some viruses, such as the one responsible for the black death and human immunodeficiency virus (hiv), require this receptor for attachment to host cells during the infection process. the black death was an epidemic that passed over northern europe during the 14th century killing nearly 60% of europeans. according to this information, which explanation best explains why northern europeans show a greater immunity for hiv than some other parts of the world?
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Biology, 22.06.2019 14:00
What could happen if two base pairs on a strand of dna or switched
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