Question 1

Which of the following best illustrates the concept of emergent properties in biological systems?

Accepted Answer

A group of cardiac muscle cells working together to pump blood, a function not possible by individual cells alone.

Question 2

Which of the following organisms is correctly matched with its domain and kingdom?

Accepted Answer

Methanococcus: Domain Archaea, Kingdom Archaebacteria

Question 3

A scientist observes that in a volcanic rock habitat, the frequency of dark-colored rock pocket mice increases over several generations. Which of the following best explains this observation?

Accepted Answer

Dark-colored mice are less likely to be seen by predators, increasing their survival and reproduction rates.

Question 4

Which of the following is an example of a positive feedback loop in biological systems?

Accepted Answer

Blood clotting after a vessel injury.

Question 5

In the Hershey-Chase experiment, why was it necessary to use both radioactive phosphorus ($$^{32}\mathrm{P}) $$and radioactive sulfur ($$^{35}\mathrm{S}$$)?

Accepted Answer

To distinguish between DNA and protein, since phosphorus is found only in DNA and sulfur only in protein.

Question 6

A plant is placed in a room with light coming from only one direction. What is the most likely response, and what is the adaptive advantage of this response?

Accepted Answer

The stem bends toward the light, maximizing photosynthetic light absorption.

Question 7

Which of the following statements about energy flow and matter cycling in ecosystems is correct?

Accepted Answer

Energy flows through the ecosystem and is eventually lost as heat, while matter is recycled.

Question 8

A student claims that all multicellular organisms are autotrophic. Which of the following refutes this claim?

Accepted Answer

Fungi are multicellular and heterotrophic, absorbing nutrients from their environment.

Question 9

If 10,000 kcal of energy is available at the producer level in a food chain, how much energy would you expect to be available to a tertiary consumer, assuming a 10% transfer efficiency at each trophic level?

Accepted Answer

$$10\ \mathrm{kcal}$$

Question 10

Which of the following best describes the role of a control group in a controlled experiment?

Accepted Answer

It provides a baseline for comparison to determine the effect of the independent variable.

Question 11

A researcher finds that GrowthMax fertilizer increases the height of bean plants but not corn plants. Which type of reasoning is used to predict that GrowthMax will increase the height of corn plants, and what does the data ultimately do to this prediction?

Accepted Answer

Deductive reasoning; the data refutes the prediction.

Question 12

Which of the following is a fundamental characteristic used to distinguish between the three domains of life?

Accepted Answer

Type of cellular organization (prokaryotic vs. eukaryotic) and differences in ribosomal RNA.

Question 13

A bright orange mutation appears in a population of rock pocket mice living on dark volcanic rock. What is the most likely outcome for this mutation, and why?

Accepted Answer

It will be quickly eliminated because orange mice are easily seen and eaten by predators.

Question 14

Which of the following best explains why positive feedback loops are rare in biological systems?

Accepted Answer

They amplify changes and drive systems away from equilibrium, which can be dangerous if not controlled.

Question 15

During human development, which of the following best describes the pattern of growth from birth to age 16?

Accepted Answer

Growth is rapid in infancy, slows during childhood, and surges again during puberty.

Question 16

Which of the following scenarios demonstrates the application of negative feedback in maintaining homeostasis?

Accepted Answer

Blood glucose rises after a meal, triggering insulin release to lower glucose levels.

Question 17

A plant’s growth curve over time is best described as:

Accepted Answer

Sigmoidal (S-shaped), with a period of rapid growth in the middle.

Question 18

Which of the following is NOT a characteristic of the Kingdom Fungi?

Accepted Answer

Cell walls made of cellulose.

Question 19

Which of the following best describes the difference between the flow of energy and the cycling of matter in an ecosystem?

Accepted Answer

Energy flows in one direction and is lost as heat, while matter cycles within the ecosystem.

Emergent Properties, Classification of Life, Homeostasis, Genetics, and Scientific Inquiry in General Biology

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