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1. Read the two descriptions of symbiotic relationships below, and select the correct term for each relationship from the list provided. Write the correct answer in the box after each description.

- Commensalism
- Mutualism
- Parasitism

**Description 1:** Mistletoe attaches to spruce trees. Using specialized structures, mistletoe penetrates into and extracts water and nutrients from the tree's branches.

**Description 2:** *E. coli* bacteria live within the intestinal tract of humans, obtaining nutrients from the food particles that pass through the intestines.

Answer :

Final answer:

The three main types of symbiotic relationships are commensalism, mutualism, and parasitism. Mistletoe exhibits parasitism with spruce trees, while E. coli reflects mutualism with humans. Commensalism is illustrated by birds nesting in trees without affecting them.


Explanation:

Symbiotic Relationships

There are three main types of symbiotic relationships: commensalism, mutualism, and parasitism. Below are examples for each:

  1. Parasitism: Mistletoe attaches to spruce trees. Using specialized structures, mistletoe penetrates into and extracts water and nutrients from the tree's branches, indicating that the mistletoe benefits while the tree is harmed.
  2. Mutualism: E. coli bacteria live within the intestinal tract of humans, obtaining nutrients from food particles that pass through the intestines. In this relationship, both the bacteria and the human benefit: the bacteria receive nutrients while aiding in digestion for the human.
  3. Commensalism: A bird nesting in a tree benefits by having a safe place for its eggs, while the tree remains unaffected.

Understanding these relationships is crucial in the study of ecosystems and biological interactions.


Learn more about Symbiotic Relationships here:

https://brainly.com/question/43928260


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