Laboratory Manual in Elementary Biology ...
Laboratory Manual in Elementary Biology ...
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Chara has its stem strengthened by a firm internal crust of carbonate of lime. The stem and leaves in Chara contain a system of cortical cells ; in Nitella no such system is present.
128 STONEWORT. 1 29 LABORATORY WORK.
A. — GROSS MORPHOLOGY OF THE THALLUS.
(a) Examine a fresh Chara in water in a white dish or over a piece of white paper. Observe its general appear- ance, and note how it affects the touch of your fingers.
(p) Observe the size and plan of the thallus. Note the joints (nodes) and... the segments (internodes) between the joints (m). Are the internodes everywhere of uniform length? Observe the summit (apex) of the stem and its opposite end (base).
(c) Observe the circles (whorls) of thread-like organs (leaves) on the primary or main axis (stem) of the plant.
Where, on the stem, are the leaves inserted? Do you find any exceptions to your answer? How many leaves in the same whorl? Note the cluster of leaves (apical bud) crowded together at the apex of the stem.
Sketch a portion of the stem including two nodes and two internodes (X 2).
What to read after Laboratory Manual in Elementary Biology ...?
You can find similar books in the "Read Also" column, or choose other free books by Boyer, Emanuel Roth, 1851-1900 to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Chara has its stem strengthened by a firm internal crust of carbonate of lime. The stem and leaves in Chara contain a system of cortical cells ; in Nitella no such system is present.
128 STONEWORT. 1 29 LABORATORY WORK.
A. — GROSS MORPHOLOGY OF THE THALLUS.
(a) Examine a fresh Chara in water in a white dish or over a piece of white paper. Observe its general appear- ance, and note how it affects the touch of your fingers.
(p) Observe the size and plan of the thallus. Note the joints (nodes) and... the segments (internodes) between the joints (m). Are the internodes everywhere of uniform length? Observe the summit (apex) of the stem and its opposite end (base).
(c) Observe the circles (whorls) of thread-like organs (leaves) on the primary or main axis (stem) of the plant.
Where, on the stem, are the leaves inserted? Do you find any exceptions to your answer? How many leaves in the same whorl? Note the cluster of leaves (apical bud) crowded together at the apex of the stem.
Sketch a portion of the stem including two nodes and two internodes (X 2).
What to read after Laboratory Manual in Elementary Biology ...?
You can find similar books in the "Read Also" column, or choose other free books by Boyer, Emanuel Roth, 1851-1900 to read onlineMoreLess
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