Answer:
2)neuton
Explanation:
because neuton is Part of Earth
Parasitism, because it's hurting the shark, but not the eel
Answer:
Number of nucleosomes in
bp is equal to 
Explanation:
For wounding one nucleosome, total length of DNA required is equal to
bp
The length of linker DNA in mammals is equal to
bp
Thus , the total length of DNA that confides between two nucleosome is equal to the sum of wounding length of DNA and the linker length
bp
Thus, in
bp length of DNA, the total number of nucleosomes is equal to 
Thus, number of nucleosomes in
bp is equal to

I do believe that it is C. crossing over :) I hope that is correct, it seems like the only plausible answer.
Answer: option A - threat, after habitat loss, to native species of plants and animals and to the maintenance of biologically diverse ecosystems
Explanation:
Invasive species refers to organisms that appears at a particular habitat that has just undergone an environmental unfavorable condition.
These INVASIVE SPECIES poses THREAT to the native organisms, because they usually possess:
better resistance to disease,
higher reproductive rate, etc.
So, even when native organisms migrate or dies, Invasive species REMAINS. As a result, they threaten the maintenance of a biologically diverse ecosystem