BIOLOGY 161 FINAL EXAM STUDY
GUIDE QUESTIONS AND ANSWERS
WITH VERIFIED SOLUTIONS 100%
CORRECT!!!
What is a population?
✔✔ A group of organisms of the same species living in a specific area.
How do plants convert sunlight into usable energy?
✔✔ They turn sunlight into chemical energy stored in bonds during
photosynthesis.
What is the primary energy source for producers in ecosystems?
✔✔ Sunlight.
Studying the structure of DNA to understand inheritance is an example of
what approach?
✔✔ A reductionist approach — breaking down complex processes into parts.
What is taxonomy?
✔✔ The scientific discipline focused on naming and classifying organisms.
Which two domains include prokaryotic organisms?
✔✔ Bacteria and Archaea.
What suggests all life shares a common origin?
✔✔ The nearly universal use of the same genetic code.
,When are organisms considered well adapted to their environment?
✔✔ When inherited traits help them survive and reproduce successfully.
Why is evolution essential in biology?
✔✔ It explains the diversity of life and connects all biological concepts.
What is a community in ecology?
✔✔ All living species found in a shared area or ecosystem.
What reveals similarities among all living organisms?
✔✔ DNA's common structure and role in inheritance.
How do hypotheses differ from theories?
✔✔ Hypotheses are narrow explanations; theories are broader and supported by
more evidence.
What are the four most essential elements in living things?
✔✔ Carbon, hydrogen, oxygen, and nitrogen.
What makes each chemical element distinct?
✔✔ Its unique number of protons.
What does an element’s atomic mass tell us?
✔✔ The sum of its protons and neutrons.
What are isotopes?
✔✔ Versions of the same element with different numbers of neutrons.
, Where are an atom’s valence electrons?
✔✔ In the outermost electron shell.
What happens in a covalent bond?
✔✔ Two atoms share electrons to complete their outer shells.
What creates a polar covalent bond?
✔✔ Unequal sharing of electrons between two atoms.
How do ionic bonds and covalent bonds differ?
✔✔ Ionic bonds involve transferring electrons; covalent bonds involve sharing
them.
What is chemical equilibrium?
✔✔ When the forward and reverse reactions in a chemical process happen at the
same rate.
How are atoms connected in a water molecule?
✔✔ Through polar covalent bonds.
What causes hydrogen bonding between water molecules?
✔✔ Slight charges on different ends of the molecules attract one another.
What are the key properties of water?
✔✔ Cohesion, temperature regulation, expansion when frozen, and strong solvent
abilities.
GUIDE QUESTIONS AND ANSWERS
WITH VERIFIED SOLUTIONS 100%
CORRECT!!!
What is a population?
✔✔ A group of organisms of the same species living in a specific area.
How do plants convert sunlight into usable energy?
✔✔ They turn sunlight into chemical energy stored in bonds during
photosynthesis.
What is the primary energy source for producers in ecosystems?
✔✔ Sunlight.
Studying the structure of DNA to understand inheritance is an example of
what approach?
✔✔ A reductionist approach — breaking down complex processes into parts.
What is taxonomy?
✔✔ The scientific discipline focused on naming and classifying organisms.
Which two domains include prokaryotic organisms?
✔✔ Bacteria and Archaea.
What suggests all life shares a common origin?
✔✔ The nearly universal use of the same genetic code.
,When are organisms considered well adapted to their environment?
✔✔ When inherited traits help them survive and reproduce successfully.
Why is evolution essential in biology?
✔✔ It explains the diversity of life and connects all biological concepts.
What is a community in ecology?
✔✔ All living species found in a shared area or ecosystem.
What reveals similarities among all living organisms?
✔✔ DNA's common structure and role in inheritance.
How do hypotheses differ from theories?
✔✔ Hypotheses are narrow explanations; theories are broader and supported by
more evidence.
What are the four most essential elements in living things?
✔✔ Carbon, hydrogen, oxygen, and nitrogen.
What makes each chemical element distinct?
✔✔ Its unique number of protons.
What does an element’s atomic mass tell us?
✔✔ The sum of its protons and neutrons.
What are isotopes?
✔✔ Versions of the same element with different numbers of neutrons.
, Where are an atom’s valence electrons?
✔✔ In the outermost electron shell.
What happens in a covalent bond?
✔✔ Two atoms share electrons to complete their outer shells.
What creates a polar covalent bond?
✔✔ Unequal sharing of electrons between two atoms.
How do ionic bonds and covalent bonds differ?
✔✔ Ionic bonds involve transferring electrons; covalent bonds involve sharing
them.
What is chemical equilibrium?
✔✔ When the forward and reverse reactions in a chemical process happen at the
same rate.
How are atoms connected in a water molecule?
✔✔ Through polar covalent bonds.
What causes hydrogen bonding between water molecules?
✔✔ Slight charges on different ends of the molecules attract one another.
What are the key properties of water?
✔✔ Cohesion, temperature regulation, expansion when frozen, and strong solvent
abilities.
