Week 1 — Quiz (auto-graded) · The Science of Biology

Course: Introduction to Biology — General Biology I (BIOL 101) · Silver Oak University (fictional sample) · Prof. Castellano
Objective tested: Objective 1 — characteristics of life; levels of organization; the scientific method & controlled experiments; hypothesis vs. theory; evolution as the unifying theme.
Points: 10 (1 each) · Assignment group: Quizzes (10% of grade) · Due: end of Module 1.

This is the human-readable quiz with its vetted answer key and feedback. The import-ready Classic QTI is in F-quiz-week-01-qti.xml (generated by the shared validated script — parses with 10 items, every single-answer item exactly one correct). The reusable item-bank entries and the Canvas placement block are at the bottom of this file.

Blueprint

No trick questions; distractors target the Week 1 misconceptions named in the lecture outline.

Questions, key, and feedback

Q1 (MC). Biology is best defined as the —
- A. study of rocks, minerals, and the structure of the Earth
- B. scientific study of life and living organisms ✅
- C. study of chemical reactions in non-living matter only
- D. belief that living things are too complex to study scientifically
Feedback: Biology is the scientific study of life — it tests claims about living things against evidence. (A is geology; C is part of chemistry; D rejects the whole scientific premise of the field.)

Q2 (MC). A candle flame uses energy, grows, and can spread. Biologists still classify it as not alive mainly because it —
- A. gives off heat and light
- B. is not found in nature
- C. is not made of cells and has no DNA or homeostasis ✅
- D. moves too quickly to be alive
Feedback: Life is the whole checklist, not any single trait. The flame is not made of cells, carries no DNA, and maintains no homeostasis — so matching a few traits isn't enough.

Q3 (Multiple answer — select all that apply). Which of the following are characteristics shared by all living things?
- A. Made of one or more cells ✅
- B. Always able to move from place to place
- C. Maintains homeostasis (a stable internal environment) ✅
- D. Reproduces and passes on genetic information (DNA) ✅
- E. Made of non-living crystal that grows when wet
Feedback: Cells, homeostasis, and reproduction are all on the checklist of life. Movement is not required (a tree doesn't walk), and a growing crystal (E) is non-living — it grows but lacks cells, DNA, and metabolism.

Q4 (MC). A single heart muscle cell can twitch, but only the organized heart can pump blood through the body. The pumping ability that appears only at the level of the whole organ is an example of —
- A. homeostasis
- B. a controlled variable
- C. an emergent property ✅
- D. natural selection
Feedback: An emergent property is a new property that appears at a higher level of organization that the parts alone don't have — pumping emerges from the organized organ, not from one cell. (Levels run atom → molecule → cell → tissue → organ → organism → … )

Q5 (MC). A researcher tests whether warmer water speeds up how fast a sugar cube dissolves. She dissolves cubes in water at 10 °C, 20 °C, and 30 °C and times each one; everything else is kept the same. The independent variable is —
- A. the temperature of the water ✅
- B. the time it takes each cube to dissolve
- C. the size of the sugar cube
- D. the type of container used
Feedback: The independent variable is what the researcher deliberately changes — the water temperature. "I change the Independent." The time-to-dissolve is the dependent variable; cube size and container are kept constant.

Q6 (Matching). Match each experimental-design term to its meaning.
| Term | Correct meaning |
|---|---|
| Independent variable | What the researcher deliberately changes |
| Dependent variable | The outcome the researcher measures |
| Controlled variable | A factor kept the same across all groups |
| Control group | The no-treatment baseline used for comparison |
Feedback: The classic mix-ups: the independent variable is changed while the dependent variable is measured; the control group is the baseline that gets no treatment (not the group that gets it).

Q7 (MC). In an experiment testing whether a fertilizer makes plants grow taller, one group of plants gets the fertilizer and an otherwise-identical group gets none. The group that gets no fertilizer is the —
- A. experimental group
- B. control group ✅
- C. independent variable
- D. confounding variable
Feedback: The control group is the no-treatment baseline you compare against. The fertilizer-treated plants are the experimental group; without the control, you'd have nothing to measure the effect against.

Q8 (True / False). "In science, a theory is just a guess or hunch that hasn't been tested yet."
- True
- False ✅
Feedback: False. In science a theory is a broad, well-supported explanation backed by a large body of evidence (the cell theory, the theory of evolution). A single testable prediction is a hypothesis — that's the smaller, more tentative idea.

Q9 (MC). Which of the following is a scientific hypothesis (a single, testable, falsifiable statement) rather than a broad theory or an untestable claim?
- A. The theory of evolution by natural selection
- B. "Bean plants watered with cold coffee will grow shorter than bean plants watered with plain water." ✅
- C. "My houseplant grows well because it can feel that I love it."
- D. The cell theory
Feedback: A hypothesis is one specific, testable prediction you could check with an experiment (B). A and D are broad, evidence-backed theories; C is not falsifiable — no result could prove or disprove "it feels my love," so it isn't scientific.

Q10 (MC). Over several years of antibiotic use in a hospital, a bacterial population shifts from mostly non-resistant to mostly antibiotic-resistant, because the few resistant bacteria survived and reproduced. This is a direct example of the process that biologists consider biology's unifying theme —
- A. homeostasis
- B. the scientific method
- C. evolution by natural selection ✅
- D. the levels of organization
Feedback: Evolution by natural selection — heritable traits that aid survival become more common in a population over generations — explains both life's unity and its diversity, which is why it ties the whole course together. The resistant bacteria survived and passed on the trait.

Answer key (quick reference)

Quality gate (self-checked): each single-answer item has exactly one correct option; the multiple-answer item lists all three true characteristics (A, C, D) and requires B and E to be left unselected; the matching item pairs four terms to four distinct meanings; no item asserts a fact outside the Week 1 course definitions. No computation in this quiz, so no arithmetic to mis-key (Week 1 is conceptual; the quantitative pockets begin at Week 2's pH lab and Week 4's surface-area-to-volume).

Item-bank entries (for variants + the midterm/final)

All ten items are tagged course=BIOL101 · week=1 · objective=1 · topic=science-of-biology and deposited in Item Bank: Week 1 — The Science of Biology. The midterm (Week 8) and the per-term variant updates draw fresh items from this bank. (Tags: q1 definition, q2 is-it-alive, q3 characteristics-of-life, q4 emergent-property, q5 independent-variable, q6 experimental-design-match, q7 control-group, q8 theory-vs-guess, q9 hypothesis-vs-theory, q10 natural-selection.)

Canvas placement block

canvas_object   = Quizzes::Quiz
title           = "Week 1 Quiz — The Science of Biology"
assignment_group = "Quizzes"
points_possible = 10
grading_type    = points
due_offset_days = 6        # 6 days after module start
published       = true
shuffle_answers = true
provenance      = "~ Prof. Castellano's edition · Fall 2026 · built with thecoursemaker.com"