Following replication, a chromosome consists of a pair of sister chromatids, held together at the centromere; each chromatid is comprised of a single DNA helix.
What will be an ideal response?
chromatid
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________ is a bacterial plasmid vector.
A. Lambda B. T4 DNA ligase C. SV40 D. pUC19
Which type of joint creates a space filled with fluid?
a. synovial joint b. fibrous joint c. cartilaginous joint d. vertebral disks
Four of the five phenotypes listed below are
dominant traits in garden peas. Select the exception. a. green pod b. purple flower c. yellow seed coat d. dwarf plant e. axial flower position
Scientists have found that the existing populations of a certain species of amphibian are small in number, lacking in genetic diversity, and separated from each other by wide areas of dry land. Which of the following human actions is most likely to improve the long-term survival of the amphibians?
A) Cloning the largest individuals to counteract the effects of aggressive predation B) Reducing the population size by one-fifth to decrease competition for limited resources C) Constructing a dam and irrigation system to control flooding D) Building ponds in the areas of dry land to promote interbreeding between the separated populations