🔬 CELLS & BODY SYSTEMS
⚛️ MATTER & CHEMICAL REACTIONS
🌱 ECOSYSTEMS & CLASSIFICATION
🧬 GENETICS & HEREDITY
Random
100
A student observes that a cell cannot control what enters or leaves.
What structure is most likely not functioning?
What is the cell membrane?
100
A student combines two substances and observes bubbles forming.
What type of change occurred?
What is a chemical change?
100
A plant produces its own food using sunlight.
What kingdom does it belong to?
What is Plantae?
100
The Punnett square shows a cross between two heterozygous parents (Bb × Bb).
What is the probability of the recessive trait appearing?
What is 25%?
100
Identical twins have the same DNA, but one develops a disease and the other does not. Explain how this is possible.
What is environment affects gene expression?
200
A cell stops producing proteins. Which organelle is most likely affected?
What is the ribosome?
200
A student compares the three models shown.
Which state of matter has particles that move the MOST freely?
What is gas?
200
A mushroom absorbs nutrients from dead organisms.
What kingdom?
What is Fungi?
200
Two organisms look the same (same phenotype), but one is BB and the other is Bb.
Explain how they can look the same but have different genotypes.
What is both have a dominant allele that shows the same trait?
200
A student claims: “Cold objects have no particle movement.”
Explain why this statement is incorrect using particle theory.
What is particles always move, but slower at lower temperatures?
300
A cell has a working nucleus but no mitochondria.
Predict what will happen to the cell over time.
The cell will not have energy and will eventually die.
300
Explain why the total mass remains the same.
What is atoms are rearranged, not created or destroyed?
300
A predator is removed from an ecosystem.
What happens to the prey population?
It increases.
300
A red flower and a white flower produce pink offspring. What
What is traits can blend (incomplete dominance)?
300
A student says: “If a parent has a dominant trait, all offspring will have it.” Explain why this is incorrect.
What is dominant traits can still be hidden if recessive alleles are inherited?
400
During exercise, a student’s breathing and heart rate increase.
Explain how two body systems work together to support this change.
Respiratory brings oxygen; circulatory transports it.
400
Which is a chemical change and why?
What is burning wood because a new substance is formed?
400
An organism is single-celled and has a nucleus.
What kingdom is it in?
What evidence supports your answer?
Protista; has nucleus (eukaryotic).
400
A mutation causes some insects to be darker. In a polluted environment, darker insects survive more.Explain why this trait becomes more common.
What is natural selection favors the darker insects?
400
A student compares O₂ and H₂O. Which is a compound and why?
H₂O; different elements.
500
A scientist removes the nucleus from a cell. What happens to the cell? Why?
Cell cannot function; nucleus controls activities (DNA).
500
A student observes a reaction in a closed container. The mass before and after is the same. What scientific principle explains this? What is happening to the particles during the reaction?
What is the Law of Conservation of Mass?
What is particles are rearranged into new substances?
500
Explain the difference between prokaryotic and eukaryotic cells.
No nucleus vs nucleus
500
A cross results in:
- 75% dominant phenotype
- 25% recessive phenotype
What type of cross occurred?
What are the parent genotypes?
What is heterozygous × heterozygous?
What is Aa × Aa?
500
Two substances are mixed. No color change occurs, but temperature increases.
Did a chemical reaction occur? Explain.
Yes; temperature change = evidence of reaction.