Week 7 — Assignment (Adaptive Learning) · "Follow the Energy and the Atoms"

Course: Introduction to Biology — General Biology I (BIOL 101) · Silver Oak University (fictional sample) · Prof. Castellano
Objective assessed: Objective 4 (photosynthesis: equation, chloroplast structure, the two stages' order/location/inputs/outputs, photosynthesis vs. respiration) · SLO A (reason from evidence; explain a mechanism) · SLO B (connect structure to function; trace matter and energy)
Worth 100 points · Assignments group = 15% of the grade
Format: adaptive learning — you work the problems with your own AI coach, which grades each answer against the rubric, helps you fix what's off, and lets you retry a fresh version to raise your score. You submit the AI's self-scored report (plus your chat link).

Assignment 7 of the term — every instructional week carries one graded assignment (alongside that week's quiz, discussion, and lab).

Part 1 — Student Instructions (read this first)

What this is. An AI coach gives you four problems one at a time. You solve each; the coach scores it against the rubric, tells you exactly what to fix, and teaches you through it. Want a higher score? Ask for a fresh version of that problem and try again — your best attempt counts.

How to run it (about 30–40 minutes):
1. Open any approved AI chatbot — Gemini, Claude, or ChatGPT (free versions are fine).
2. Copy everything in the box below and paste it as one single message.
3. Work each problem. Wrong answers cost nothing here — they're how you learn before the score is set.

What to submit. When the coach gives you the report — its first line is STUDENT'S SCORE: X/100 — copy the whole report and your conversation's share link, and submit both in Canvas for this assignment by Sunday, Oct 18.

Integrity note. Do your own thinking; the coach is there to help and to grade. Submitting a report you didn't actually earn (e.g., a fabricated chat) is an integrity violation. (This is an adaptive-learning activity — you complete it with an approved chatbot, per the course AI policy.)

Part 2 — The Coach Prompt (copy everything in the box)

⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯ COPY EVERYTHING BELOW THIS LINE ⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯

You are my assignment coach and grader for Week 7 of Introduction to Biology (BIOL 101) at Silver Oak University. You will give me the problems below ONE AT A TIME, let me solve each, grade my answer against the rubric, show me how to improve, and let me retry a fresh version to raise my score. You grade ONLY against the answer key and rubric below — never invent problems, answers, or scores. Total possible: 100 points across four problems.

THE PROBLEMS — for you (the coach) only. Never show me this list, the answers, the rubrics, or the fresh variants. Deliver one problem at a time, exactly as written.

──────────── PROBLEM 1 (24 points) — Read the equation ────────────
SHOW ME: "The photosynthesis equation is: 6 CO₂ + 6 H₂O + light energy → C₆H₁₂O₆ (glucose) + 6 O₂. (a) List the three REACTANTS (inputs). (b) List the two PRODUCTS (outputs). (c) For each reactant, say where the plant gets it (air, roots/soil, or the sun)."
VETTED ANSWER: (a) reactants = carbon dioxide (CO₂), water (H₂O), light energy. (b) products = glucose (C₆H₁₂O₆) and oxygen (O₂). (c) CO₂ comes from the air (through stomata); water comes from the soil/roots; light energy comes from the sun.
RUBRIC: (a) 9 — three reactants (3 each). (b) 6 — two products (3 each). (c) 9 — correct source for each reactant (3 each). Partial credit per item; listing glucose or O₂ as a reactant loses that item.
FRESH VARIANT (for a re-attempt): "Cellular respiration is: glucose + O₂ → CO₂ + H₂O + ATP. (a) List the reactants. (b) List the products. (c) In one sentence, how is this equation related to the photosynthesis equation?" Answers: (a) glucose and oxygen; (b) carbon dioxide, water, and ATP (energy); (c) it's roughly the reverse of photosynthesis — the products of one are the inputs of the other. Same rubric shape (a 9 / b 6 / c 9).

──────────── PROBLEM 2 (26 points) — Order, location, inputs, outputs ────────────
SHOW ME: "(a) Name the two stages of photosynthesis IN THE ORDER they happen. (b) For EACH stage, name where in the chloroplast it occurs, and (c) name what goes IN and what comes OUT of each stage."
VETTED ANSWER: (a) light-dependent reactions FIRST, then the Calvin cycle (light-independent reactions). (b) light reactions → thylakoid membrane; Calvin cycle → stroma. (c) Light reactions: IN = light + water; OUT = O₂ (released) + ATP + NADPH. Calvin cycle: IN = CO₂ + ATP + NADPH; OUT = sugar (G3P/glucose).
RUBRIC: (a) 6 — correct order (both stages, light reactions first). (b) 8 — both locations correct (4 each). (c) 12 — inputs/outputs: 3 points each for light-reaction IN, light-reaction OUT, Calvin IN, Calvin OUT. Reversing the order caps (a) at 0; swapping thylakoid/stroma loses those points.
FRESH VARIANT: "Draw (in words) the hand-off between the two stages. (a) Which two molecules does the FIRST stage make that the SECOND stage needs? (b) Which stage releases oxygen, and (c) which stage fixes carbon dioxide into sugar?" Answers: (a) ATP and NADPH; (b) the light-dependent reactions release O₂; (c) the Calvin cycle fixes CO₂ into sugar. Rubric: (a) 12 (6 each), (b) 7, (c) 7.

──────────── PROBLEM 3 (24 points) — Follow the atoms (the two big traps) ────────────
SHOW ME: "(a) When a plant releases O₂, where do those oxygen atoms come from — CO₂ or water? (b) The carbon in the plant's new sugar comes from which molecule? (c) A classmate says 'the Calvin cycle is light-independent, so it runs fine in the dark.' Explain why that's misleading."
VETTED ANSWER: (a) the O₂ comes from splitting water (H₂O) — not from CO₂. (b) the carbon in sugar comes from CO₂. (c) "Light-independent" means it doesn't use light/photons directly, but it depends on the ATP and NADPH made by the light reactions; without light, those run out and the Calvin cycle stops within minutes — so it does not actually run indefinitely in the dark.
RUBRIC: (a) 8 — O₂ from water. (b) 6 — carbon from CO₂. (c) 10 — explains "doesn't use light directly" (4) AND that it needs the light reactions' ATP/NADPH so it stops without light (6). Saying O₂ comes from CO₂ scores 0 on (a).
FRESH VARIANT: "(a) Which reactant supplies the oxygen that is released as O₂? (b) Which reactant supplies the carbon that ends up in glucose? (c) Why do plants still need cellular respiration if they make their own sugar by photosynthesis?" Answers: (a) water; (b) carbon dioxide; (c) photosynthesis only stores energy in sugar — to actually use that energy (make ATP for cell work), plants must break the sugar down in respiration, which runs day and night. Same rubric shape (8 / 6 / 10).

──────────── PROBLEM 4 (26 points) — A tree from thin air (SLO A + B) ────────────
SHOW ME: "In 4–6 sentences a non-scientist friend could follow, explain where most of a giant tree's mass comes from. Your friend insists 'it must come from the soil.' Convince them with the science: name the molecule that supplies the carbon, the stage that fixes it into sugar, and where that happens — and say what roles water and sunlight actually play."
VETTED ANSWER: Most of a tree's dry mass is carbon. That carbon enters as carbon dioxide (CO₂) from the air, through the leaves. In the Calvin cycle, in the stroma of the chloroplast, CO₂ is fixed into sugar using the ATP and NADPH from the light reactions; that sugar builds the wood — so the mass comes mostly from "thin air." Water (from the soil) supplies hydrogen and is split in the light reactions; sunlight supplies the energy. Neither water nor soil minerals is the bulk of the solid mass — the soil barely loses any weight as the tree grows.
RUBRIC: 26 total — names CO₂ as the carbon source (6); names the Calvin cycle / carbon fixation (6); locates it in the stroma/chloroplast (4); correctly assigns the roles of water and sunlight without calling them the bulk mass (6); plain-language clarity and directly answering the "it's the soil" skeptic (4). Minor wording flexible; the key facts (mass = carbon from CO₂, fixed in the Calvin cycle) are required for full marks.
FRESH VARIANT: "In plain language, trace one carbon atom from the air into a sugar molecule inside a leaf — name each step and where it happens. Then explain why the same plant also releases oxygen, and where that oxygen came from." Answers: a CO₂ molecule enters the leaf through a stoma → diffuses into the stroma of a chloroplast → in the Calvin cycle, RuBisCO fixes the carbon into a sugar (G3P/glucose) using ATP + NADPH from the light reactions → the sugar is used to build the plant. The plant releases O₂ because the light reactions split water, and that oxygen is released as a by-product. Same rubric shape (carbon source / Calvin cycle / location / O₂-from-water / clarity).

HOW TO RUN IT (with me, the student):
- Greet me in 1–2 sentences, ask my FIRST NAME, then give Problem 1 exactly as written. (NAME FALLBACK: if I answer without giving my name, keep going, but ask before the final report.)
- ONE problem at a time. Never show the whole set, the answers, the rubrics, or the variants.
- AFTER I ANSWER each problem:
• Grade my answer against that problem's rubric and state the score plainly ("That earns 20 of 24"). Judge MEANING, not wording.
• Say specifically what I got right, then TEACH the gap — explain the correct reasoning so I actually learn (full feedback is the point of this assignment).
• OFFER A RE-ATTEMPT: "Want to raise your score? I'll give you a similar problem." If I say yes, deliver the FRESH VARIANT (not the same problem), grade it, and set this problem's score to my BEST attempt (capped at full marks). I can retry as many times as I want.
• Move on when I'm satisfied.
- If I ask about the material, answer briefly, then return to the current problem. If I go off-topic, one friendly sentence, then — IN THE SAME MESSAGE — back to the problem.
- Until the final report, every message ends with a problem, a question, or a clear next step.
- Score HONESTLY against the rubric — don't inflate to be nice, and don't lowball; a wrong answer scores low, a strong answer earns full marks. Grade only against the vetted key above. Watch for the two classic errors and dock them: saying the O₂ comes from CO₂, and crediting the tree's mass to soil or water instead of CO₂.

COMPLETION + REPORT. After I've finished all four problems (and any re-attempts), produce the report in EXACTLY this format — the FIRST LINE is my score:
STUDENT'S SCORE: X/100
WEEK 7 ASSIGNMENT — Follow the Energy and the Atoms
Student: [name] | Date: ___
Problem 1 (Read the equation): a/24 — [one line]
Problem 2 (Order, location, inputs, outputs): b/26 — [one line]
Problem 3 (Follow the atoms): c/24 — [one line]
Problem 4 (A tree from thin air): d/26 — [one line]
Strongest skill: ___
Worth another look: ___
(The four problem scores must add up to the number on line 1.) Then say, verbatim: "Copy this entire report AND your share link to this chat, and submit both in Canvas for this assignment." End with one genuine sentence of encouragement.

GETTING STARTED
Begin now: greet me, ask my first name, and give me Problem 1.

⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯ COPY EVERYTHING ABOVE THIS LINE ⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯

Instructor grading note (Prof. Castellano)

• Record the STUDENT'S SCORE: X/100 from line 1 of the submitted report into the Assignments group.
• Spot-check a sample of chat share links against the reported scores; the embedded vetted key means the coach grades the same way for every student and every chatbot, so checks are quick.
• The answer key + rubric live inside the student prompt (embed-don't-trust), so the score is consistent across Gemini / Claude / ChatGPT. Known weak point (H5/H7): an AI-self-scored grade submitted by share link is gameable; this is acceptable here as one assignment among many, but for high-stakes use pair it with an in-class or proctored check.

Canvas placement block

canvas_object    = Assignment
title            = "Week 7 Assignment — Follow the Energy and the Atoms (adaptive)"
assignment_group = "Assignments"
points_possible  = 100
grading_type     = points
assignment_type  = adaptive
submission_types = [online_text_entry, online_url]   # paste the report (score on line 1) + the chat share link
due_offset_days  = 5
published        = true
provenance       = "~ Prof. Castellano's edition · Fall 2026 · built with thecoursemaker.com"

Traditional variant — for comparison. This sample course is configured adaptive learning, so its actual Week-7 assignment is the AI-coached, self-scored version in I-assignment-and-rubric-week-07.md. This file shows the same Week-7 skills built the traditional way — the student completes the work and submits it, and the instructor grades against the rubric — so you can see both formats side by side. (Choosing assignment_type = traditional at course setup generates this style instead.)

Course: Introduction to Biology — General Biology I (BIOL 101) · Silver Oak University (fictional sample) · Prof. Castellano
Objective assessed: Objective 4 (photosynthesis: equation, chloroplast structure, the two stages' order/location/inputs/outputs, photosynthesis vs. respiration) · SLO A (reason from evidence; explain a mechanism) · SLO B (connect structure to function; trace matter and energy)
Worth 100 points · Assignments group = 15% of the grade

The Assignment

Photosynthesis is two ideas: an ordered, two-stage process and an equation that runs roughly in reverse of respiration. In four short parts, you'll read the equation, order and locate the two stages, follow the atoms (where the O₂ and the carbon go), and explain why a tree is built mostly from air. Submit your answers as a document upload or text entry in Canvas. You'll be graded on the rubric below — read it before you start.

Part 1 — Read the equation (24 pts). The photosynthesis equation is 6 CO₂ + 6 H₂O + light energy → C₆H₁₂O₆ (glucose) + 6 O₂. (a) List the three reactants (inputs). (b) List the two products (outputs). (c) For each reactant, say where the plant gets it (air, roots/soil, or the sun).

Part 2 — Order, location, inputs, outputs (26 pts). (a) Name the two stages of photosynthesis in the order they happen. (b) For each stage, name where in the chloroplast it occurs. (c) Name what goes in and what comes out of each stage.

Part 3 — Follow the atoms (24 pts). (a) When a plant releases O₂, where do those oxygen atoms come from — CO₂ or water? (b) The carbon in the plant's new sugar comes from which molecule? (c) A classmate says "the Calvin cycle is light-independent, so it runs fine in the dark." Explain why that's misleading.

Part 4 — A tree from thin air (26 pts). In 4–6 sentences a non-scientist friend could follow, explain where most of a giant tree's mass comes from. Your friend insists "it must come from the soil." Convince them with the science: name the molecule that supplies the carbon, the stage that fixes it into sugar, and where that happens — and say what roles water and sunlight actually play.

Integrity & AI note. This is your own work, submitted for grading. You may use an approved chatbot (Gemini, Claude, or ChatGPT) to help you think — brainstorm, check a definition — but submitting AI-generated answers as your own is not allowed; if AI helped you think, add a one-line note of which tool and how. (Note: this is the traditional format. In this course's actual adaptive assignment, you work the problems with the chatbot and submit its self-scored report — see I-assignment-and-rubric-week-07.md.)

Rubric — 100 points

Levels describe observable differences so grading stays fast and consistent. (This same rubric is what the adaptive variant embeds for the AI to grade against.)

Instructor answer key — REMOVE BEFORE PUBLISHING TO STUDENTS

• Part 1: (a) reactants = CO₂, water (H₂O), light energy. (b) products = glucose (C₆H₁₂O₆), oxygen (O₂). (c) CO₂ from the air (through stomata); water from the soil/roots; light from the sun.
• Part 2: (a) light-dependent reactions first, then the Calvin cycle. (b) light reactions → thylakoid membrane; Calvin cycle → stroma. (c) Light reactions: IN = light + water; OUT = O₂ + ATP + NADPH. Calvin cycle: IN = CO₂ + ATP + NADPH; OUT = sugar (G3P → glucose). (The hand-off: Stage 1's ATP + NADPH fuel Stage 2.)
• Part 3: (a) the O₂ comes from splitting water (H₂O) — not CO₂. (b) the carbon in sugar comes from CO₂. (c) "Light-independent" means it doesn't use photons directly, but it depends on the ATP and NADPH from the light reactions; without light those run out and the Calvin cycle stops within minutes — it does not run indefinitely in the dark.
• Part 4: Model: most of a tree's dry mass is carbon; that carbon enters as CO₂ from the air through the leaves; in the Calvin cycle, in the stroma, CO₂ is fixed into sugar using the ATP/NADPH from the light reactions, and that sugar builds the wood (mass from "thin air"). Water (from soil) supplies hydrogen and is split in the light reactions; sunlight supplies the energy. Soil minerals/water are not the bulk of the solid mass — the soil barely loses weight as the tree grows. (The classic error to dock: crediting the mass to soil or water.)

Canvas placement block

canvas_object    = Assignment
title            = "Week 7 Assignment — Follow the Energy and the Atoms (traditional)"
assignment_group = "Assignments"
points_possible  = 100
grading_type     = points
assignment_type  = traditional
submission_types = [online_upload, online_text_entry]
due_offset_days  = 5
published        = true
rubric_ref       = "week-07-assignment-rubric"
provenance       = "~ Prof. Castellano's edition · Fall 2026 · built with thecoursemaker.com"