Question 1

Which of the following best distinguishes a scientific theory from a scientific law?

Accepted Answer

A theory is a broad explanation supported by evidence, while a law describes a consistent pattern in nature.

Question 2

A researcher is testing the effect of fertilizer on plant growth. She gives different amounts of fertilizer to several groups of plants and measures their height after four weeks. In this experiment, what is the dependent variable?

Accepted Answer

The height of the plants after four weeks

Question 3

Which of the following is NOT one of the 8 properties of life?

Accepted Answer

Photosynthesis

Question 4

Which level of biological organization is immediately more complex than a tissue?

Accepted Answer

Organ

Question 5

Which statement about prokaryotic and eukaryotic cells is correct?

Accepted Answer

Prokaryotic cells lack membrane-bound organelles.

Question 6

Which of the following best describes the concept of emergent properties?

Accepted Answer

Properties that arise from the arrangement and interaction of parts within a system.

Question 7

A population of insects develops resistance to a pesticide over several generations. Which mechanism of evolution does this scenario best illustrate?

Accepted Answer

Natural selection

Question 8

Which of the following is a correct statement about water's high specific heat?

Accepted Answer

It minimizes temperature fluctuations in organisms and environments.

Question 9

Which property of water is primarily responsible for the upward movement of water in plants (capillary action)?

Accepted Answer

Cohesion and adhesion

Question 10

A scientist is studying the effect of temperature on enzyme activity. She keeps all conditions constant except for the temperature, which she varies. What is the independent variable in this experiment?

Accepted Answer

The temperature at which the reaction occurs

Question 11

Which of the following best explains why ice floats on liquid water?

Accepted Answer

Ice is less dense than liquid water because its molecules are more ordered and spread apart.

Question 12

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

Accepted Answer

Blood clotting, where the accumulation of clotting factors accelerates the process

Question 13

Which of the following statements about atoms is correct?

Accepted Answer

The atomic number is equal to the number of protons in the nucleus.

Question 14

A molecule of water ($$ \mathrm{H_2O} ) is $$held together by which type of bond?

Accepted Answer

Polar covalent bonds

Question 15

Which of the following best describes the role of DNA in living organisms?

Accepted Answer

DNA stores genetic information and transmits it from parents to offspring.

Question 16

Which of the following is an example of an emergent property at the organ system level?

Accepted Answer

The coordinated pumping of blood by the entire circulatory system

Question 17

Which of the following best explains why humans have modified their environment, contributing to global warming?

Accepted Answer

Humans have increased the amount of CO$$_2 in $$the atmosphere through activities such as burning fossil fuels.

Question 18

Which of the following is a correct statement about isotopes?

Accepted Answer

Isotopes of an element have the same number of protons but different numbers of neutrons.

Question 19

A student dissolves 10 grams of salt in 100 mL of water. In this solution, which statement is correct?

Accepted Answer

Water is the solvent and salt is the solute.

Question 20

Which of the following best describes the difference between cohesion and adhesion?

Accepted Answer

Cohesion is the attraction between molecules of the same substance, while adhesion is the attraction between different substances.

General Biology: Foundations, Scientific Method, Chemistry of Life, and Properties of Water

Guida di studio - Domande di pratica

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