In vertical gene transfer genes move from one species to another species in the same generation
_____________________ Indicate whether the statement is true or false.
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Organisms that can grow in habitats with low water activity by maintaining a high internal salt concentration are called ________ organisms.
Fill in the blank(s) with the appropriate word(s).
Biologists sometimes damage ecosystems in order to study them. For example, researchers have fogged rainforest
trees with insecticides to search for undiscovered species that fall to the ground when poisoned. Others have deliberately added phosphates to natural lakes to study the eutrophication process. What is your ethical position on such studies? Should they be banned, or is the knowledge gained worth the harm they cause?
What will be an ideal response?RFLPs can be used to establish parent-offspring relationships because, assuming that two parents are heterozygous for different sets of RFLPs, a child will have
a. four RFLPS, represented by two identical RFLPs from each parent. b. two different RFLPs, one from each parent. c. four RFLPS, represented by two different RFLPs from each parent. d. two identical RFLPs, one from each parent. e. two different RFLPs, both from one parent.
Which statement best describes the role of the E. coli RNA polymerase sigma factor?
a. Sigma factor allows assembly of RNA polymerase. b. Sigma factor is responsible for catalyzing the formation of phosphodiester bonds during RNA polymerization. c. Sigma factor shuttles cytoplasmic RNA polymerase to promoter sequences. d. Sigma factor increases the affinity of RNA polymerase for promoter sequences. e. Sigma factor actively removes core enzyme from DNA and attaches it to a promoter.