Biology, 12.08.2020 09:01 adamkladke
1. a) ………………………………………………………………………………………is the movement of biological molecules against a concentration gradient, which requires the expenditure of ATP. (1mk) b) Other than ATP, name a requirement necessary for the process in (a) to take place. (1mk
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Biology, 21.06.2019 14:30
As soon as possible this assignment is due in 5 minutes atoms in a molecule are bonded together by sharing, gaining, or a. photons b. protons c. neutrons d. energy f. electrons
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Biology, 21.06.2019 21:20
25. what does meiosis create? haploids or diploid? somatic cells or gametes?
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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?
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Biology, 22.06.2019 19:00
Achange in direction without a change in speed is called velocity
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1. a) ………………………………………………………………………………………is the movement of biological molecules against a concentrati...
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