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Types of physical weathering apart from block disintegration include;Granular disintegration Pressure release/unloadingSlakingCrystal growthExfoliationFrost action/Freeze and thaw action
Thigmotropism occur in herbaceous stems but not woody because;Woody plants have strengthening tissuesWoody stems are rigid
A stage of cell division where exchange of genetic material occur is Metaphase
A stage of cell division where replication of genetic material occur is Interphase
Reason why radioactive disintegration is different from ordinary chemical changes is;Chemical reaction involves electrons while radio activity involves nuclear reaction ie neutron and proton. Or in chemical reaction no new element if formed while in radioactivity new element is formed.