Lichens. Annie L. Smith

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Annie Clephan

Orphan Annie-eye Nuclei

The nucleus forms the central part of a cell which controls gene expression and mediates the replication of deoxyribonucleic acid (DNA) during cell cycle. Two main types of nuclei which we usually encounter are the open face (transcriptionally active cells), consisting of large areas of euchromatin and the closed faced nucleus (transcriptionally inactive cells-most of its genome is in inactive ...

Lichens

What are lichens? The term lichen refers to a symbiotic association between a filamentous fungus, the ‘mycobiont’, and at least one photosynthetic organism, the ‘photobiont’, consisting of a micro alga, a cyanobacterium, or both (Figure 1). Although the symbiotic nature of lichens was first revealed in 1867, the development of a lichen thallus is often so integrated (Figure 1D) that they have b...

Annie oakley guns down "cocaine libel".

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