Answer:
d. a system that enhances the destruction of bacteria through the activation of mast cells, lymphocytes, and phagocytes
Explanation:
Mast cells are white blood cells (i.e., lymphocytes) that form part of the immune system. These cells form part of the first line of defense against pathogenic organisms. Some of the most important phagocytic cells that function to protect the body by ingesting pathogenic agents (e.g., harmful bacteria) include mast cells, monocytes, neutrophils, macrophages and dendritic cells. In this regard, it is important to highlight that mast cells are similar to basophil granulocytes (another type of lymphocyte), and they are derived from hematopoietic stem cells.
Answer:, microorganisms whose action results in the conversion of nitrates in soil to free atmospheric nitrogen, thus depleting soil fertility and reducing agricultural productivity.
Explanation:
False
Environmentalists are complaining now about so-called "issues" more than ever.
The correct answer is (C) Insects get food from flowers and help the flowers reproduce.
Mutualism is a condition where both the members get benefit of living on each other. In this condition the the insects gets food in the form of nectar and helps the flower to reproduce. It is a condition in which one organism (insect) is helping the plant to reproduce and as a result of this, the insect is getting food from the flower.
Answer:
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