Answer the following statements true (T) or false (F)
1. Both embryonic stem cells and embryonic germ cells are pluripotent.
2. A myeloid progenitor cell can differentiate into immune cells of the blood and lymph systems.
3. Restriction enzymes bind to specific sequences of DNA to seal them together.
4. Most plasmids used in biotechnology contain a selectable marker such as an antibiotic-resistance (ampR) gene.
5. A genomic DNA library is derived from mRNA.
1. TRUE
2. FALSE
3. FALSE
4. TRUE
5. FALSE
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On a phylogenetic tree, two clades that emerge from the same node are called ____ because they are each other’s
closest relatives.
a. sister clades b. ancestral clades
c. phyla d. families e. cousins
An action potential results from the
a. opening of voltage-gated channels. b. closing of voltage-gated channels. c. ionization of voltage-gated channels. d. opening and closing of voltage-gated channels. e. opening and ionization of voltage-gated channels
Which is a function of tracheids?
A) food storage B) photosynthesis C) production of sex cells D) water conduction
Which organism has the greatest proportion of protein-coding DNA in its genome?
A) E. coli B) human C) fruit fly D) round worm E) Arabidopsis (a plant)