Cosmids are plasmids that can be packaged into capsids of the bacteriophage lambda; therefore, they can be transmitted like phages, but they can exist and replicate in a cell like plasmids.
Answer the following statement true (T) or false (F)
True
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Sometimes, malignant cells do not stay properly anchored in tissues because of the loss of function of:
a. plasma membrane adhesion proteins b. nuclear membranes c. cell walls d. oncogenes e. tumor suppressor genes
What structure is responsible for the exchange of gas in leaves?
a. Aerenchyme b. Propagule c. Lenticels d. Stomata
The loss of mayflies from a stream suggests that the quality of water is declining; therefore, mayflies are a(n) ____ species.
a. degraded b. endangered c. threatened d. keystone e. indicator
Methylene blue
a. is used to kill cells that are moving too quickly to observe. b. detoxifies cells so they are safe to handle. c. is used as food for Physarum cells. d. is a biological stain used to increase contrast of transparent cells.