Cancer cells form masses of cells called
A) tumors.
B) cyclins.
C) growth factors.
D) p53.
Ans: A) tumors.
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Genomic libraries enable the discovery of individual gene(s) involved in a particular function of interest with cloning vectors in an expression host, such as Escherichia coli
Indicate whether the statement is true or false.
A semipermeable membrane bag containing 10% sucrose is permeable to water but not to sucrose. The bag is immersed in water. The solution in the bag is ________ to the water, and water will move ________ the bag
a. hypotonic / into b. hypertonic / out of c. hypotonic / out of d. hypertonic / into
When a land bridge connecting two continents
is cut off due to rising sea levels, this can lead to
a. sympatric speciation. b. disruptive selection. c. directional selection. d. hybrid sterility. e. allopatric speciation
Tendrils are
A. structures in some carnivorous plant leaves that trigger the leaves to close on insects. B. starch-storing specialized roots. C. specialized stems that grow across the ground, and reproduce shoots and roots. D. the central, supporting stalk of a compound leaf. E. specialized stems that coil and provide springy attachment for climbing.