The exchange of genetic material during crossing over causes which of the following?
A) genetic variation
B) stasis
C) heterozygosity
D) homozygosity
A
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A nonprofit conservation organization receives a sizeable donation and decides to purchase several thousand acres of 'high desert' in southern California. This particular type of desert has an intermediate level of species diversity and few unique species. However, much of the original areas of high desert have been converted to suburban housing and shopping. The decision by the nonprofit to preserve this area was most likely based upon what conservation strategy?
A. Conservation of endemic species hotspots B. Conservation of representative habitats C. Conservation of megadiverse areas D. Conservation of single species
The vaginal microbiome changes as a female matures because
A. most sexually mature women use douching as a means to eliminate the vaginal microbiome. B. hormonal changes and sexual activity alter the environment of the vagina. C. episodic treatments with antibiotics for UTIs and antifungals for vaginitis eliminate many of the normal microbiota. D. estrogen has an antibiotic effect on the vaginal microbiome.
X-linked traits are more likely to be expressed in males. Why? Under what circumstances are they expressed in females?
What will be an ideal response?
Which enzyme is used to bind DNA fragments together?
A) restriction enzyme B) lysozyme C) DNA ligase D) DNA polymerase