Which characteristics work well in a dichotomous key?
a) smooth or rough
b) green or ro...
Answers: 3
Biology, 21.06.2019 20:10
Which best describes a rhinovirus? o a. a virus that causes a common cold o b. a protective shell around a virus o c. a tube the comes off a virus o d. a piece of dna transferred by a virus
Answers: 1
Biology, 22.06.2019 13:00
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
Biology, 22.06.2019 16:10
The source of energy shown in the image is (renewable, non renewable, polluting) a drawback of building a dam is that (it will destroy ecosystems, it requires fossil fuels, it won’t be useful for irrigation)
Answers: 2
Biology, 22.06.2019 20:00
Name the tissue types that form the wall of each organ in questions 7-10
Answers: 3
Biology, 08.07.2019 08:30
Physics, 08.07.2019 08:30
Mathematics, 08.07.2019 08:30
Mathematics, 08.07.2019 08:30
Chemistry, 08.07.2019 08:30
Computers and Technology, 08.07.2019 08:30
Mathematics, 08.07.2019 08:30
Physics, 08.07.2019 08:30
English, 08.07.2019 08:30