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Delgado Biology 141 Final Exam – Complete Questions and Answers with Verified Solutions & Explanations (2025–2026 PDF Download)

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Delgado Biology 141 Final Exam – Complete Questions and Answers with Verified Solutions & Explanations (2025–2026 PDF Download)

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Uploaded on
September 8, 2025
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Written in
2025/2026
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Delgado Biology 141 Final
Biological order can be seen in a _________ organization, from the level of
highly structured organic molecules in the cells to the highest level of
populations and communities in biomes and biosphere
a) Haphazard
b) Perfect

✅✅
c) Hierarchical
d) Evolutionary - -c) Hierarchical

Experiments are carried out to test the hypothesis by changing one variable
at a time and including a(n) _______ condition in which the variable is
unaltered
a) Experimental
b) Control

✅✅
c) Altered
d) Stable - -b) Control

After making care observations, scientists construct a(n):
a) Hypothesis
b) Experiment

✅✅
c) Conclusion
d) Data set - -a) Hypothesis

Hypotheses which are consistent with the results of experimental testing
are:
a) Accepted as scientific principles
b) Accepted without further question

✅✅
c) Conditionally accepted
d) Rejected - -c) Conditionally accepted

The scientific process involves:
a) The acceptance of the hypothesis
b) Rejection of the hypothesis that is inconsistent with the
experimental results
c) The acceptance of only data consistent with the hypothesis

✅✅
d) The formulation of theories without experimentation or obtaining proof -
-b) Rejection of the hypothesis that is inconsistent with the
experimental results

Hierarchical organization in living organisms goes from lowest to highest in
which of the following statements:

,Cell theory is one of the foundations of biology. Which of the following
statements is not consistent with this theory? a) All organisms are made up
of more than one cell
b) Cells arise from other cells through the process of cell
division
c) Cells carry genetic material passed to daughter cells during cellular

✅✅
division
d) Energy flow (metabolism and biochemistry) occurs within cells - -d)
Energy flow (metabolism and biochemistry) occurs within cells

The method of reasoning that uses construction of general principles by
careful examination of many specific cases is called:
a) Deductive reasoning

✅✅
b) Theoretical reasoning
c) Inductive reasoning - -c) Inductive reasoning

In science when general principles are arrived at from the examination of
specific hypotheses (cases), it is called:
a) Inductive reasoning
b) Deductive reasoning

✅✅
c) Theory
d) Controlled testing - -b) Deductive reasoning

A suggested explanation that might be true and is subject to testing by
further observations is a(n):
a) Experiment
b) Generality

✅✅
c) Hypothesis
d) Theory - -c) Hypothesis

To be valid, an experiment must not include:
a) A control

✅✅
b) Only one variable
c) More than one variable - -c) More than one variable

Which of the following BEST describes the theory of natural selection?
a) The generic make-up of a population gradually changes from
one generation to the next
b) Living organisms change over time
c) Some individuals have genes that increase their chances for survival and

,survival and reproduction. These individuals are more likely to reproduce
and pass on their genes, causes their genes to become more common in
the next generation

Which of the following characteristics is unique to living organisms?
a) Ability to move

✅✅
b) Composed of cell(s)
c) Composed of atoms - -b) Composed of cell(s)

All of the substances of the universe that have mass and occupy spaces
are defined as______
a) Matter
b) Energy

✅✅
c) Mass
d) Molecules - -a) Matter

All atoms possess _____, defined as the ability to do work
a) Matter
b) Energy

✅✅
c) Mass
d) Molecule - -b) Energy

Bohr proposed that atoms of any kind contain _____ particles. Those
located in the nuclear core are called neutrons and protons:
a) Ionic
b) Molecular

✅✅
c) Subatomic
d) Tiny - -c) Subatomic

The number of protons in a given atom is equal to its ___ number
a) Atomic
b) Mass

✅✅
c) Hydrogen
d) Molecular - -a) Atomic

Isotopes that decay with a nuclear break-up and emit a significant amount
of energy are said to be ______
a) Energetic
b) Ionic

✅✅
c) Radioactive
d) Isotopic - -c) Radioactive

, b) Elements

✅✅-b) Elements
c) Metals
d) Molecules -

When atoms gain or lose electrons, they become negatively or positively
charged. They are known as:
a) Molecules
b) Isotopes

✅✅
c) Ions
d) Radioactive - -c) Ions

When two atoms share a pair of electrons, the bonding is referred to as:
a) Ionic
b) Covalent

✅✅
c) Unstable
d) Hydrogen - -b) Covalent

Water molecules are polar with ends that exhibit partial positive and
negative charges. Such opposite charges make water molecules attract
each other through bonds called:
a) Ionic bonds

✅✅
b) Covalent bonds
c) Hydrogen bonds - -c) Hydrogen bonds

Which of the following statements about protons is false:
a) Protons have 1 positive charge
b) Protons have 1 dalton of mass

✅✅-d)
c) Protons are always found in the nucleus of the atom
d) The number of protons is the same as the number of electrons -
The number of protons is the same as the number of electrons

Which of the following statements about electron is false? a) An electron
has 1 negative charge
b) The mass of an electron is 1/1840 Dalton
c) The number of electrons equals the number of protons and neutrons

✅✅
d) Electrons are found in an area around the nucleus called the orbital -
-c) The number of electrons equals the number of protons and
neutrons

The atomic number of an element is equal to the number of: a) Protons
only

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