Name a place where mitosis is common in plants.
Reveal answer
Meristems (root and shoot tips).
Key words: meristem
4(b) INHERITANCE · RECALL
4.29 Where mitosis occurs
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What is meant by the term growth?
Reveal answer
Permanent increase in size or cell number.
Key words: growth
What is meant by the term repair?
Reveal answer
Replacement or restoration of damaged tissue.
Key words: repair
What is meant by the term meristem?
Reveal answer
Plant region containing actively dividing unspecialised cells.
Key words: meristem
Uses of mitosis, Embryonic growth. What increases? Why identity matters?
Reveal answer
What increases: Cell number. Why identity matters: Builds tissues from one zygote.
Key words: Embryonic growth
Uses of mitosis, Skin repair. What increases? Why identity matters?
Reveal answer
What increases: Replacement cells. Why identity matters: Restores barrier function.
Key words: Skin repair
Uses of mitosis, Bone-marrow renewal. What increases? Why identity matters?
Reveal answer
What increases: Blood-cell precursors. Why identity matters: Maintains blood production.
Key words: Bone-marrow renewal
Uses of mitosis, Plant root tip. What increases? Why identity matters?
Reveal answer
What increases: Meristem cells. Why identity matters: Extends root and forms tissues.
Key words: Plant root tip
Uses of mitosis, Vegetative propagation. What increases? Why identity matters?
Reveal answer
What increases: Clone number. Why identity matters: Preserves successful genotype.
Key words: Vegetative propagation
True or false, and why? “Mitosis only happens in embryos.”
Reveal answer
False. It also supports repair, renewal and asexual reproduction.
True or false, and why? “Every adult body cell divides continually.”
Reveal answer
False. Division rate varies greatly between tissues and cell types.
True or false, and why? “A clone cannot differ from its parent.”
Reveal answer
False. Mutations and different environments can create differences after cloning.
Give two reasons why mitosis happens in the body.
Reveal answer
Growth, repair, replacing worn-out cells, asexual reproduction (any two).
Key words: growth · repair
Name a place in the human body where mitosis is especially common.
Reveal answer
Skin, bone marrow or the lining of the gut.
Key words: skin
Which type of reproduction relies on mitosis?
Reveal answer
Asexual reproduction.
Key words: asexual