A pathogen is a disease carrying vector that has the ability to spread using a variety of different mechanisms. A pathogen that is a contagion has the ability to spread through touch. An example of such a pathogen would be the one that results in staph infections.
Homozygous.
You can tell in future that if both letters are either lowercase or upper case (e.g. TT or tt) the answer is always HOMOzygous. If the letters are different cases (e.g. Tt or tT) the answer is always HETROzygous. This is because 'homo' means 'same' and 'hetero' means 'different'.
Answer:
hydropower is the best source
Atmospheric nitrogen fixation<span> is the process in which lightning converts </span>nitrogen<span>gas in the </span>atmosphere<span> into usable compounds. It makes </span>nitrogen<span> available to</span>organisms<span>.</span>
