Which of the following best describes the relationship between variations and adaptations? A.
The fish all have different colors, but only the fish with green colors have an adaptation that will help them survive.

B.
The fish all have different colors and all of those colors are considered adaptations that will help them survive.

C.
The fish which are able to change their color variation to green have developed an adaptation that will help them survive.

D.
The fish all have different variations which help them survive, but the different fish colors like red, orange, green and yellow would be considered adaptations.

Which is a genetic engineering advancement directly related to a career in biotechnology? 1) improving solar energy collection 2) transporting textiles at higher rates 3)creating crop foods that resist insect pests 4)repairing historical sites with quality materials

18. which statement about cancer is true?

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?