Explanation:
The collaboration of human beings began in the past especially to offer security for offspring. Families living in communities had prolonged life for offspring due to collective security for the benefit of the whole community. Even when some members of community went to hunt or gather food, they are assured to the security of their offspring living in the community. It is believed it is such acts of collaboration that evolved into the current social fabric of society.
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Answer:
allosteric enzymes exhibit a threshold effect where the response to substrate concentration changes significantly have more than one subunit. have more than one substrate-binding site.
Explanation:
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Answer: c
It says the answer needs to be 20 characters long)
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The correct answers are I and IV
There are three main effects of complement :
1. Lysis of cells such as bacteria and tumor cells.
2. Generation of mediators that participate in inflammation and attract neutrophils to the site of infection, an event called chemotaxis.
3. Opsonization i.e. enhancement of phagocytosis.
Lysis of pathogens by complement involves the insertion of a special substance called the membrane attack complex into the cell membrane of the pathogen which disrupts or punctures the membrane as a result of which water and electrolytes enter the pathogen and it dies.
Generation of mediators known as C5a and C567 complex attract neutrophils.