A variety of microorganisms live as symbionts in the human digestive tract. What determines whether their relationship with the human is parasitic or mutualistic?
a their size compared to human cells
b their reproductive rate compared to the replication rate of human cells
c. whether or not they gain energy from food that the human eats
d whether their actions harm or benefit the human host

D, whether their actions harm or benefit their human host.

Explanation: The nature of the relationship between the host and microorganism can be categorized based on whether the actions of the microorganism harm or benefit the host.

his research revealed two genetically different groups of prokaryotes, which justified splitting kingdom monera into two kingdoms. the genetic and cellular differences were so great, that these two kingdoms were eventually placed into different domains in the current three-domain system.

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guys i’m confused.

which rock will weather faster?

answer: b rock