1.) a. to clean tanks in fisheries
2.)87 days
3.) true
4.) false
5.) 1.9 million
Antibodies
<span>Antibodies are a kind of protein that gets secreted by B lymphocytes of the immune system, and each antibody is going to be specific to one epitope. Once the antibody finds its specific target, such as the surface of a pathogenic bacteria, other cells in the immune system will perform a certain function depending on the kind of antibody.</span>
This drug stops the growth of a DNA chain when added to DNA because DNA polymerase requires a 3′ end -OH group.
<h3><u>Explanation:</u></h3>
Molecular Formula: 
In a dideoxynucleoside compound the 3'-hydroxyl group attached to sugar molecules are replaced by a hydrogen. This upgrade prevents the formation of "5' to 3' phosphodiester linkages", required for the elongation of DNA chains, which results in terminating viral DNA growth.
This drug inhibits HIV replication at small level, acting as a terminator of viral DNA. The toxic side effect is "axonal degeneration" resulting in "peripheral neuropathy".
Ionic and Covalent bonds
Ionic bonds : Is a chemical bond between a metal and a non-metal and an electron Transfer takes place.
Covalent bonds: A chemical bond between two non-metals and an electron
Sharing takes place.
Answer:
The limited autonomy of the robotic rovers on Mars posed a big problem.
Explanation:
Missions are very costly, and can lead the project to fail with the simplest errors. If the rover was permanently trapped on a rock or destroyed, it would have a catastrophic impact on the exploration. Thus on-board technologies would still be more traditional than what a laboratory environment has sought. The autonomous rovers will considerably increase the productivity of crew. Responsibility for their own well-being is also useful for the rovers: to prevent getting hurt, to recognize and correct recoverable hardware and software faults.
