Biology, 11.04.2020 07:55, teddybear8728
Arctic terns nest in the Tundra in shallow scraped out depressions on the open ground. The depressions are lined with a small amount of dead plant matter such as grass. What is described?
habitat
competition
niche
grazing
Answers: 2
Biology, 21.06.2019 21:00, Kingmoney959
Leila has dimples because she received a gene copy from her father that coded for dimples. this means that dimples are an example of a trait that is
Answers: 2
Biology, 22.06.2019 09:00, webbhlharryteach
Which of the following statements about protists are true? a. they are typically found in moist environments. b. they are all unicellular. c. they have a nucleus. d. they are all multicellular.
Answers: 1
Biology, 22.06.2019 10:30, genyjoannerubiera
Jason, a dog breeder, decides to mate a poodle with a golden labrador retriever. he wants to get puppies with the curly hair of the poodle and the color of the labrador. what concept is shown in this example? question 6 options: artificial selection adaptation evolution natural selection
Answers: 1
Biology, 22.06.2019 13:00, mimivenga
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?
Answers: 1
Arctic terns nest in the Tundra in shallow scraped out depressions on the open ground. The depressio...
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