Probably the greatest advantage for the original multicellular organisms was their ability to
A) photosynthesize.
B) increase their food intake.
C) increase their metabolism.
D) use more oxygen.
E) avoid predation.
E
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Explain why DNA fragments migrate toward the positive electrode and why some fragments migrate more rapidly than others during gel electrophoresis
How does this electronegativity influence observations and conclusions drawn from DNA migrated through an agarose gel? What will be an ideal response?
Genetic information carried by a(n) _____________________ directs the synthesis of a(n) _____________________
chain during translation. Fill in the blank(s) with the appropriate word(s).
Refer to the accompanying figure. What is the structure labeled as 9?
a. foot
b. gills
c. heart
d. siphons
e. digestive tract
How does a phage transfer DNA from one bacterium to another?
a. Phages form a bridge between bacterial cells that allows DNA to pass from the host cell to the recipient cell. b. Phages form a bridge between bacterial cells that allows DNA to pass in both directions between the two cells. c. Phages lyse bacterial cells, releasing bacterial DNA into the environment, which is taken up by other phages for transfer to new cells. d. When phages assemble in an infected bacterial cell, they may incorporate host DNA; released phages may attach to other cells and inject the bacterial DNA into those cells. e. Phages attach to receptors on bacterial cells and receive some of the target cells’ DNA; the phages release this DNA into the environment to be taken up by other bacterial cells.