What is a nebula?
-the core of a massive star
-a cloud of gas and dust in space
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Biology, 28.01.2020 18:43, 92835304629
What is a nebula?
-the core of a massive star
-a cloud of gas and dust in space
-a swirling disk with a lot of gravity
-the debris remaining after a supernova
Answers: 2
Biology, 22.06.2019 06:00, theresamarieuehling2
Most animal cell membranes have proteins that pump. ions out of the cell and potassium ions into this
Answers: 3
Biology, 22.06.2019 11:20, maddiecrouch21
Drag each label to the correct location on the chart. match the function to the type of tissue
Answers: 2
Biology, 22.06.2019 11:30, reese12345
Which of the following is an eon in the time scale? phanerozoic proterozoic archean all of the above
Answers: 2
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
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Mathematics, 23.04.2021 02:10