Bryophytes may feature all of the following at some time during their existence except
A) microphylls.
B) rhizoids.
C) archegonia.
D) sporangia.
E) placental transfer cells.
Answer: A) microphylls.
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What is the purpose of a selectable marker such as the antibiotic-resistance gene ampR?
A. Selectable markers allow a researcher to identify cells that have incorporated the recombinant plasmid. B. Selectable markers produce antibiotics, which kill cells that have not incorporated recombinant plasmid. C. Selectable markers prevent cells that have incorporated one plasmid from incorporating another. D. Selectable markers allow a researcher to identify the recombinant plasmid. E. Selectable markers are only effective in viral vectors.
How much of the available sunlight energy is usually converted into an ecosystem's gross primary productivity?
a. 1 % b. 2 % c. 5 % d. 10 % e. 25 %
This is the process a cell goes through to select which genes it will express.
A. differentiation B. somatic cell transfer C. discrimination D. determination
An example of a TLR would be peptidoglycan found in the cell wall of gram-positive bacteria
Indicate whether the statement is true or false