Question 1

Which of the following statements best describes a scientific hypothesis?

Accepted Answer

A testable explanation based on observations and assumptions that can be supported or refuted by experimentation.

Question 2

A researcher wants to test the effect of sunlight on plant growth. She sets up two groups of plants: one receives sunlight, and the other is kept in the dark. What is the independent variable in this experiment?

Accepted Answer

Amount of sunlight received by the plants.

Question 3

Which of the following is NOT a property of life shared by all living organisms?

Accepted Answer

Ability to photosynthesize.

Question 4

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

Accepted Answer

A functioning heart can pump blood, but individual heart cells cannot.

Question 5

Which of the following statements about the three domains of life is correct?

Accepted Answer

Bacteria and Archaea are both prokaryotic, while Eukarya includes all eukaryotic organisms.

Question 6

A controlled experiment is designed to compare an experimental group with a control group. Which of the following best describes the control group?

Accepted Answer

The group that is left unmanipulated to serve as a baseline for comparison.

Question 7

Which of the following is an example of negative feedback regulation in biological systems?

Accepted Answer

When blood glucose rises, insulin is released to lower it back to normal levels.

Question 8

Which of the following best describes the relationship between structure and function in biology?

Accepted Answer

The shape of a biological structure often determines its function.

Question 9

Which of the following statements about DNA is correct?

Accepted Answer

DNA is composed of two long chains arranged in a double helix, with four types of nucleotides: A, T, C, and G.

Question 10

Which of the following best defines a genome?

Accepted Answer

The entire set of genetic instructions found in an organism.

Question 11

A scientist is studying the set of all proteins expressed in a human liver cell. What field of study is she working in?

Accepted Answer

Proteomics

Question 12

Which of the following is a key difference between prokaryotic and eukaryotic cells?

Accepted Answer

Eukaryotic cells have membrane-bound organelles, while prokaryotic cells do not.

Question 13

Which of the following best describes the process of gene expression?

Accepted Answer

The process by which information from DNA is used to synthesize proteins.

Question 14

Which of the following is an example of a producer in an ecosystem?

Accepted Answer

A maple tree converting sunlight into chemical energy through photosynthesis.

Question 15

Which of the following is a correct sequence of levels of biological organization from smallest to largest?

Accepted Answer

Molecule $$\rightarrow$$ Organelle $$\rightarrow$$ Cell $$\rightarrow$$ Tissue $$\rightarrow$$ Organ $$\rightarrow$$ Organism $$\rightarrow$$ Population $$\rightarrow$$ Community $$\rightarrow$$ Ecosystem $$\rightarrow$$ Biosphere

Question 16

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

Accepted Answer

During blood clotting, the presence of clotting factors accelerates the production of more clotting factors.

Question 17

Which of the following statements about scientific theories is correct?

Accepted Answer

A scientific theory is broader in scope than a hypothesis and is supported by a large body of evidence.

Question 18

Which of the following best describes the role of consumers in an ecosystem?

Accepted Answer

Consumers obtain energy by feeding on other organisms or their remains.

Question 19

A scientist observes that a certain type of bacteria can survive in extremely hot environments. She hypothesizes that these bacteria belong to which domain?

Accepted Answer

Archaea

Question 20

Which of the following best explains why supernatural explanations are outside the bounds of science?

Accepted Answer

They cannot be observed or measured, making them untestable by scientific methods.

Chapter 1: Evolution, Themes of Biology, and Scientific Inquiry – Study Notes

Guida di studio - Domande di pratica

Study guide - Flashcard