🧬Asexual vs Sexual Reproduction
Which type of reproduction produces identical offspring?
A. Sexual reproduction
B. Asexual reproduction
C. Both
D. Neither
✅ Answer: B. Asexual reproduction
Which reproduction leads to more genetic variation?
A. Asexual
B. Sexual
C. Both the same
D. Neither
✅ Answer: B. Sexual
Natural selection is best described as:
A. Humans choosing traits
B. Organisms choosing traits
C. Nature selecting traits that help survival
D. Random chance only
✅ Answer: C. Nature selecting traits that help survival
Which is an example of artificial selection?
A. Wolves hunting deer
B. Birds migrating
C. Plants growing toward sunlight
D. Farmers breeding cows for more milk
✅ Answer: D. Farmers breeding cows for more milk
A population is:
A. One organism
B. Different species together
C. Same species in one area
D. All animals on Earth
✅ Answer: C. Same species in one area
Which is a disadvantage of asexual reproduction?
A. Requires two parents
B. Slow reproduction
C. Low genetic variation
D. High energy use
✅ Answer: C. Low genetic variation
Why is genetic variation important?
A. It helps populations survive changes
B. It makes organisms bigger
C. It slows reproduction
D. It prevents mutation
✅ Answer: A. It helps populations survive changes
Which organism is MOST likely to survive?
A. Weakest traits
B. Traits that match the environment
C. Random traits
D. Oldest organism
✅ Answer: B. Traits that match the environment
Why do humans use artificial selection?
A. To help nature
B. To produce desired traits
C. To increase predators
D. To stop evolution
✅ Answer: B. To produce desired traits
Over time, natural selection causes populations to:
A. Change traits
B. Decrease only
C. Stay the same
D. Disappear immediately
✅ Answer: A. Change traits
Explain why asexual reproduction may be risky if the environment changes.
✅ Answer: Offspring are identical, so all may be affected by the same threat.
Explain how sexual reproduction increases survival chances.
✅ Answer: It creates variation, so some organisms survive changes.
Explain how natural selection leads to adaptation.
✅ Answer: Helpful traits are passed down more over time.
Explain how artificial selection can change a species over time.
✅ Answer: Humans select traits, increasing them in future generations.
Explain what happens to a population when beneficial traits increase.
✅ Answer: Population becomes better adapted.
A disease spreads through a population of identical plants. Predict what will happen and explain why.
✅ Answer: Most may die because they lack genetic variation to resist disease.
A population with high variation faces a drought. Predict the outcome.
✅ Answer: Some individuals survive due to helpful traits.
A species of bird develops stronger beaks over generations. Explain how this happened.
✅ Answer: Birds with stronger beaks survived and reproduced more.
Farmers breed only the fastest-growing crops. What happens over time?
✅ Answer: Fast growth increases, but other traits may decrease.
A predator is introduced into an ecosystem. Explain how prey populations may change.
✅ Answer: Traits that help survival increase over time.
Compare how asexual and sexual reproduction affect long-term survival of a species.
✅ Answer: Asexual is fast but risky (low variation); sexual is slower but increases survival (high variation).
Evaluate which population is more likely to survive a major environmental change: low or high variation. Explain.
✅ Answer: High variation population because some traits help survival.
Analyze how a sudden environmental change can shift which traits are beneficial.
✅ Answer: Traits that were helpful may become harmful, and new traits become beneficial.
Compare natural selection vs artificial selection in how traits are chosen.
✅ Answer: Natural = nature selects; Artificial = humans select.
Predict how a population might change after many generations if a trait is constantly favored.
✅ Answer: That trait becomes prevalent in the population.