Heterocyst-forming cyanobacteria differentiate highly specialized cells to provide fixed nitrogen to the vegetative cells in a filament. In the presence of a source of combined nitrogen such as nitrate or ammonium, Anabaena PCC 7120 grows as long filaments containing hundreds of photosynthetic vegetative cells.
The right answer is B. back pain from the compressed nerves
Narrow cervical canal symptoms can range widely from no symptoms to gait and balance disorders to radiculaglia when there is foraminal narrowing associated with central narrowing. Discrete balance disorders may be early signs of myelopathy (posterior cords). Later, the patients suffer from proximal weakness and paresthesia of the four limbs, as well as disorders of the fine motor skills of the hands (do not manage to close buttons of shirt, difficulties with the writing, etc., on reaching the lower motor neuron). In more advanced stages, gait disturbances and even later sphincter control disorders may occur (upper motor neuron involvement).
Answer:
All the continents seem to fit together like a puzzle.
Explanation:
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Answer:
animal cells: They do not have a cell wall, and have multiple vacuoles.
pplant cells: They have a cell wall, chloroplast, and can perform photosynthesis, and also contains a single large vacuole which is used for storage.
Explanation:
