Cell Division quiz

More questions about Cell Division

These visible examples show the question style. LearnClash turns the full topic into ranked duels and spaced repetition.

1. 1 Easy

   Which process halves a cell's chromosome number?

   Answer: Meiosis

   Why: Sperm and egg each bring 23 chromosomes, so fertilization restores the usual 46 instead of doubling it every generation.

2. 2 Medium

   Which part of a human cell breaks down in mitosis, then reforms?

   Answer: Nuclear envelope

   Why: Yeasts and many other fungi skip this step: they keep the envelope whole and build the spindle inside the nucleus.

3. 3 Hard

   What is the longest a human egg can stay paused in meiosis?

   Answer: About 50 years

   Why: Even at ovulation the egg stops again midway through its second division and finishes it only if a sperm gets in.

4. 4 Easy

   What organ almost never develops its own cancer?

   Answer: Heart

   Why: Adult heart muscle cells rarely divide, leaving cancer far fewer chances to start than in fast-renewing tissues like the colon.

5. 5 Medium

   In which stage does a cell copy its DNA?

   Answer: S phase

   Why: A human cell begins copying its DNA at about 30,000 separate starting points during this phase.

6. 6 Hard

   What does meiosis make in mosses and ferns?

   Answer: Spores

   Why: Each spore grows into a separate small plant generation, which later makes eggs and sperm by mitosis rather than meiosis.