Molecules to Organisms
A student observes a cell under a microscope. The cell membrane is damaged. Which function will be MOST directly affected?
A. Making proteins
B. Controlling what enters and leaves the cell
C. Storing genetic information
D. Producing energy
B. Controlling what enters and leaves the cell
A population of deer increases in a forest.
Which resource will MOST LIKELY become limited first?
A. Sunlight
B. Water
C. Food plants
D. Oxygen
C. Food plants
A trait is passed from parents to offspring.
What carries this information?
A. Proteins
B. Water
C. DNA
D. Cells
C. DNA
Which trait helps an organism survive in its environment?
Adaptation
A plant is placed in a dark room for 5 days but still receives water. What will MOST LIKELY happen?
A. It will grow faster
B. It will stop producing glucose
C. It will produce more oxygen
D. It will increase photosynthesis
B. It will stop producing glucose
A lake loses most of its algae.
Which organism is MOST affected first?
A. Fish that eat plants
B. Birds
C. Predators
D. Decomposers
A. Fish that eats plants
Two identical twins have different heights due to nutrition differences.
What BEST explains this?
A. Only genetics matter
B. Only environment matters
C. Both genetic and environmental factors
D. Mutation
C. Both genetic and environmental factors
A population of insects includes some resistant to pesticide.After spraying, most surviving insects are resistant. Why?
A. Resistant insects survived and reproduced
B. They chose to adapt
C. All insects changed
D. Pesticide created resistance instantly
A. Resistant insects survived and reproduced
Two groups of identical bacteria are grown:
After 24 hours, Group A has many more cells.
Which conclusion is BEST supported?
A. Sugar provides energy needed for growth
B. Bacteria only reproduce in light
C. Sugar changes DNA
D. Growth is random
A drought reduces plant growth in a grassland ecosystem. What is the MOST likely effect on the food web?
A. Herbivores increase
B. Herbivores decrease
C. Carnivores increase
D. No change
B. Herbivores decrease
A mutation changes a gene involved in pigment production in an animal.
What is the MOST likely result?
A. Behavior changes only
B. No effect ever
C. Immediate extinction
D. Change in physical trait
A fossil layer shows many species suddenly disappear.
What is the MOST likely explanation?
A. Gradual change
B. Random change
C. Migration
D. Sudden environmental event
D. Sudden environmental event
During exercise, a person’s breathing rate and heart rate both increase. Why does this occur?
To get full points, mention why and what are the two systems that working together here.
A city builds roads through a forest habitat. Which outcome is MOST likely?
A. Increased biodiversity
B. Habitat fragmentation
C. More predators
D. Increased rainfall
B. Habitat Fragmentation
Two plants reproduce:
Which will show MORE variation and why?
Farmers breed only the largest chickens over many generations.
What process is this?
A. Natural selection
B. Artificial selection
C. Mutation
D. Adaptation
B. Artificial selection
A student claims: “Cells do not need energy because they are very small.” Use evidence to evaluate this claim.
A scientist removes a top predator from an ecosystem. Explain how this change will MOST LIKELY affect at least two other populations.
A population shows variation in fur thickness. A cold winter occurs.
Explain how BOTH genetics and environment influence which individuals survive.
A species develops longer beaks over generations in an environment with deep flowers. Explain how natural selection leads to this change.