Evolution
Which core concept explains how populations change over generations?
Evolution
What does the core concept structure and function mean?
What does the core concept structure and function mean?
Which core concept describes how biological information is stored, transmitted, and used?
Information flow
What happens to matter in biological systems?
Matter is rearranged/transformed rather than simply disappearing.
What does homeostasis mean?
Maintaining relatively stable internal conditions despite changes inside or outside the organism.
A population of birds has different beak shapes. Over many generations, the types of beaks that help birds obtain food become more common.
Evolution
Why might the shape of a protein matter to its function?
Its shape determines how it interacts with other molecules.
DNA contains information that can ultimately be used to produce what?
Proteins
What do organisms need energy for?
Give two examples.
Your body temperature stays around a relatively stable range even when the temperature outside changes.
Which concept does this demonstrate?
Homeostasis
True or False, animals evolve because they decide they need to adapt.
False
A protein normally has a specific 3D shape. A change causes the protein's shape to change.
What might happen to its function?
Its function could change or be lost because structure affects function.
Put these in the correct general order:
Protein → DNA → RNA
DNA → RNA → Protein
A plant uses sunlight to make chemical energy.
Which core concept does this demonstrate?
Energy and matter
Your body gets too hot.
What would you expect your body to do to help return temperature toward its normal range?
Responses such as sweating and increased blood flow to the skin.
A population of insects contains both green and brown insects.
What if the environment suddenly became covered in dark soil?
Predict what might happen to the population over several generations and explain why.
Brown insects may be harder for predators to see → they may survive/reproduce more → brown coloration could become more common.
Imagine you have a key that perfectly fits a lock.
What if you bend the key significantly?
How does this demonstrate structure and function?
Changing the structure/shape of the key affects its ability to perform its function.
What if a change occurred in DNA that altered the instructions for making a protein?
What could potentially happen?
The resulting protein could have a different structure or function, potentially affecting the organism.
What if a plant suddenly received no sunlight for several days?
What would you predict would happen to its ability to produce energy-rich molecules?
Its ability to produce them through photosynthesis would decrease.
WHAT IF humans could no longer sweat?
What problem might occur on a very hot day?
It would become more difficult to release heat, making temperature regulation harder.
Which statement is more consistent with evolution?
A. "This individual organism evolved to survive."
B. "The population became better adapted over generations."
B
A student's answer says:
"Structure and function means that everything in an organism has a purpose."
Is this a complete explanation?
No.
The concept specifically describes the relationship between how something is structured and what it can do.
How could information flow and structure & function be connected?
DNA contains information → information is used to make a protein → the protein's structure determines its function.
True or false:
"Energy is created by organisms when they eat food."
Organisms transform energy from one form to another.
Why is homeostasis important?
Biological processes generally function best within certain internal conditions, so organisms must regulate those conditions.