21. on first attachment is secondary succession
22. is the degree of variation of life....
genetic, species or ecosystem within a specific area, system or planet
23. the last one is wrong = )
Answer:
G-T-A-G-C-T
Explanation:
A always pair with T and G always pairs with C.
The organism would not have to find a partner in order to reproduce.
Human influence ecosystem by chopping down forests,and cars burning off greenhouse gases.Humans can effect the ecosystem in a negative way ,by pollution, waste dumping, over hunting of animals,over fishing,industrial gases,energy use and not using
Answer:
its D
Explanation:
because conduction happens through solids and the others are obviously conventional current