Key definitions Root cap – a parenchyma-cell-based protective cap that protects the terminal meristem in most root tips
Shallower root – the section of a plant that grows down into the soil to get water and sustenance while also
supporting the plant
Combination – a consequence or outcome of combining
Emerge – to emerge as a result of evolution
Cell division – the process of cell division that includes both nuclear and cytoplasmic division
Extinction – the state or situation of becoming extinct or extinguished
Absorb – to absorb (something, like as water) gradually or naturally
Exercises 1 : Read the following words and guess their meaning:
root, seed germination, embryo, emerge, radicle, protect, exclusive, soil, elongation, maturation,
differentiation, vascular, absorption, mineral, cortex, pith, checkpoint, waxy substance, starch,
moisture, orchid, node
Exercise 2 : Work with a partner and do the test.
1. The __________ is the sources of the root hairs.
d.
pericycle
e.
endodermis
f.
hypodermis
g.
trichoblasts
2. The endodermis of Casparian strips is present in
a.
Diacot stem
b.
Dicot root
c.
Dicot leaf
d.
Monocot stem.
3. The endodermis of __________ has passage cells.
a.
Diacot stem
b.
Dicot root
c.
Dicot leaf
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(credit a: modification of work by "psyberartist"/Flickr; credit b: modification of work by David Eikhoff)
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d.
Monocot stem.
4. The cortex's deepest layer is called
a.
Epidermis
b.
Hypodermis
c.
Endodermis
d. Pericycle
