The photosynthetic symbiont of a lichen is often a(n)
a) ascomycete.
b) green alga.
c) small vascular plant.
d) moss.
e) brown alga.
Ans: b) green alga.
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Due to the genetic diversity of viruses and their lack of ribosomal RNA, nucleotide-based phylogeny studies are not applicable to virology
Indicate whether the statement is true or false.
Burkholderia cepacia and Pseudomonas aeruginosa can be a particular problem with ________.
A. myasthenia gravis patients B. decay of iron pipes under anaerobic conditions C. pneumonia patients D. cystic fibrosis patients
The ________ valves prevent blood from flowing back into the heart once it has left the ventricles
Fill in the blank(s) with correct word
When scientists inserted the Bt toxin gene into plant cells they created a
A. transgenic plant. B. stem cell. C. new species. D. clone. E. monohybrid.