IB myp 4-5 Biology – Practice Questions- All Topics
Topic :Evolution-Cell division
Topic :Evolution– Weightage : 21 %
All Questions for Topic : Life Cycles,Natural Selection,Cell division,Mitosis,Meiosis,Reproduction,Biodiversity,Inheritance and variation,DNA and genetics
Question:
If you wanted to make a model of a 20 μm diameter cell, how wide would the model have to be, to give it the same size ratio as you calculated in Question 1?
▶️Answer/Explanation
Ans: 20 micrometres x 1,000 = 20,000 micrometres; = 20 millimetres.
Question:
What is the advantage of making the size ratio for the diameter and the membrane thickness the same?
▶️Answer/Explanation
Ans: Scale model; more realistic; more likely to behave like the thing being modelled.
Question:
What would happen if a cell divided repeatedly without enlarging?
▶️Answer/Explanation
Ans: The cell would become smaller and smaller.