Question

from the hidden life of trees
many ago, i stumbled across a patch of strange - looking mossy stones in one of the preserves of old beech trees that grows in the forest i manage. casting my mind back, i realized i had passed by them many times before without paying them any heed. but that day, i stopped and bent down to take a good look. the stones were an unusual shape: they were gently curved with hollowed - out areas. carefully, i lifted the moss on one of the stones. what i found underneath was tree bark. so, these were not stones, after all, but old wood. i was surprised at how hard the “stone” was, because it usually takes only a few years for beechwood lying on damp ground to decompose. but what surprised me most was that i couldn’t lift the wood. it was obviously attached to the ground in some way.
i took out my pocketknife and carefully scraped away some of the bark until i got down to a greenish layer. green? this color is found only in chlorophyll, which makes new leaves green; reserves of chlorophyll are also stored in the trunks of living trees. that could mean only one thing: this piece of wood was still alive! i suddenly noticed that the remaining “stones” formed a distinct pattern: they were arranged in a circle with a diameter of about 5 feet. what i had stumbled upon were the gnarled remains of an enormous ancient tree stump. all that was left were vestiges of the outermost edge. the interior had completely rotted into humus long ago — a clear indication that the tree must have been felled at least four or five hundred years earlier. but how could the remains have clung onto life for so long?
living cells must have food in the form of sugar, they must breathe, and they must grow, at least a little. but without leaves — and therefore without photosynthesis — that’s impossible. no being on our planet can maintain a

1. interconnected tree roots help trees share food with each other.
2. tree roots become connected together through a random process.
3. if trees are isolated, their roots still try to connect to roots of the same species.
4. when trees grow in groups, their interconnected roots must compete for food.

part b
select two ways the author develops the correct central idea from part a.

1. he provides details about the hardships faced by trees.
2. he gives examples of trees that have long life - spans.
3. he provides evidence from scientific research about trees.
4. he contrasts groups of trees with human communities.

Explanation:

To solve this, we analyze each option for Part A (assuming Part A's central idea is about tree roots' connections) and then Part B's options to see which develop that idea:

Part A (assuming it's a "select the correct central idea" question, though the exact question for Part A isn't fully clear, but let's assume we need to pick the correct statement about tree roots):

• Option 1: “Interconnected tree roots help trees share food with each other.” – This aligns with scientific understanding of tree root networks (mycorrhizal or root grafting for resource sharing).
• Option 2: “Tree roots become connected together through a random process.” – Root connections (e.g., grafting or mycorrhizal networks) are not random; they follow ecological/species-specific patterns. Eliminate.
• Option 3: “If trees are isolated, their roots still try to connect to roots of the same species.” – Isolated trees have limited ability to connect to others (no nearby roots), so this is inconsistent. Eliminate.
• Option 4: “When trees grow in groups, their interconnected roots must compete for food.” – While competition exists, the primary role of root networks is often cooperation (sharing nutrients/water), so this misrepresents the main idea. Eliminate.

Thus, Part A Answer: 1. Interconnected tree roots help trees share food with each other.

Part B (select two ways the author develops the central idea from Part A):

• Option 1: “He provides details about the hardships faced by trees.” – The passage focuses on root connections, not hardships. Eliminate.
• Option 2: “He gives examples of trees that have long life - spans.” – The author’s example of the ancient tree stump (with roots still alive) shows how root connections (or residual life) support long - term survival, relating to root - based resource sharing (if the stump is connected to living trees). This develops the idea.
• Option 3: “He provides evidence from scientific research about trees.” – The author uses scientific concepts (chlorophyll, decomposition, cellular needs) to explain how the stump could stay alive (implying root - based resource sharing). This develops the idea.
• Option 4: “He contrasts groups of trees with human communities.” – No such contrast exists. Eliminate.

Final Answers:

Part A:

1. Interconnected tree roots help trees share food with each other.

Part B:

1. He gives examples of trees that have long life - spans.
2. He provides evidence from scientific research about trees.

Answer:

To solve this, we analyze each option for Part A (assuming Part A's central idea is about tree roots' connections) and then Part B's options to see which develop that idea:

Part A (assuming it's a "select the correct central idea" question, though the exact question for Part A isn't fully clear, but let's assume we need to pick the correct statement about tree roots):

• Option 1: “Interconnected tree roots help trees share food with each other.” – This aligns with scientific understanding of tree root networks (mycorrhizal or root grafting for resource sharing).
• Option 2: “Tree roots become connected together through a random process.” – Root connections (e.g., grafting or mycorrhizal networks) are not random; they follow ecological/species-specific patterns. Eliminate.
• Option 3: “If trees are isolated, their roots still try to connect to roots of the same species.” – Isolated trees have limited ability to connect to others (no nearby roots), so this is inconsistent. Eliminate.
• Option 4: “When trees grow in groups, their interconnected roots must compete for food.” – While competition exists, the primary role of root networks is often cooperation (sharing nutrients/water), so this misrepresents the main idea. Eliminate.

Thus, Part A Answer: 1. Interconnected tree roots help trees share food with each other.

Part B (select two ways the author develops the central idea from Part A):

• Option 1: “He provides details about the hardships faced by trees.” – The passage focuses on root connections, not hardships. Eliminate.
• Option 2: “He gives examples of trees that have long life - spans.” – The author’s example of the ancient tree stump (with roots still alive) shows how root connections (or residual life) support long - term survival, relating to root - based resource sharing (if the stump is connected to living trees). This develops the idea.
• Option 3: “He provides evidence from scientific research about trees.” – The author uses scientific concepts (chlorophyll, decomposition, cellular needs) to explain how the stump could stay alive (implying root - based resource sharing). This develops the idea.
• Option 4: “He contrasts groups of trees with human communities.” – No such contrast exists. Eliminate.

Final Answers:

Part A:

1. Interconnected tree roots help trees share food with each other.

Part B:

1. He gives examples of trees that have long life - spans.
2. He provides evidence from scientific research about trees.