1
Q
What is Mitosis?
A
Process which multicellular organism maintain, grow, reproduce and repair itself, nuclear division
2
Q
What is cleaving of cell?
A
Cytokinesis, meaning division of cytoplasm through cell division, splitting of daughter cells
3
Q
Where are the sites of mitosis in plants?
A
Meristems/meristematic tissue:
- Apical meristems: primary, grows on tips of stem and roots
- Buds: secondary, branches & leaves
- Cambium: Secondary growth, woody tissue, bark
- Pericycle: Secondary, underground, plant roots
4
Q
Sites of mitosis in mammals:
A
- Basal layer of the skin: base of epidermis, hair, nails, feathers, scales
- Bone marrow: red blood cells
- cells in digestive tract
- liver cells
- bone cells: grow
5
Q
2 types development in insects:
A
Complete Metamorphis & incomplete metamorphis
6
Q
Characteristics of complete metamorphosis:
A
- total transformation
- has a ‘pause’ stage (cocoon)
- caterpillar –> butterfly
- most larval tissue are destroyed,
- reconstructed by embryonic tissue differentiate
7
Q
Characteristics of incomplete metamorphosis:
A
- gradual transformation
- shredding/ moulting
- many stages
- baby grasshopper –> adult grasshopper
- less cell death
- simply increase in cells, enlarge to corresponding tissue
8
Q
What is apoptosis?
A
programmed cell death, skin between fingers
9
Q
What organelles contains DNA:
A
- nucleus: long stranded DNA
- mitochondria: circular DNA (attaches to itself)
- chloroplasts: also circular DNA
