Answer:
e. None of these
Explanation:
The immune deficiency viruses (HIV) are retroviruses that use a reverse transcriptase (RT) enzyme to produce a single-stranded DNA (ssDNA) from an RNA template. The reverse transcription allows retroviruses to replicate their genetic material, which is integrated into the host's genome as a double-stranded linear DNA molecule in a similar way to the mechanism of insertion used by endogenous retrotransposons. The synthesis of DNA is started by cellular tRNAs (tRNA3Lys) that are packaged into the virion. After reverse transcription, the HIV DNA enters the nucleus of CD4 immune cells (also known as CD4+ T cells), and then it integrates into the genome to coopt the host's cell machinery for its own replication.
Answer:
Direct and indirect sunlight is the main cause for the 4 different seasons
Explanation:
Quartz
Soft and the one with weird air holes
Answer:
ok man im only gonna anser a few so here did ya a solid good luck
2- arctic
3-pacific
4- antarctic
5- indian
6- pacific
7- greek or norse
8- pangea
9- mariana trench
10-true
11- ???? 70 perecent of earth if that what its asking
12- ???
13- marine viruses (internet) i think probs phytoplankton
14- green i think
15-???
16- hella
17- israel
18- salt
19- a drifter
20- corilis effect
21- idk man
22- 1.6%
23- sonars
24- ??
25- bermuda triangle
Explanation:
Friction causes moving objects to slow down or stop.
