The relationship between Trichonympha protozoa and its termite host, and Xenorhabdus bacteria and its nematode host, are both obligatory relationships.
Answer the following statement true (T) or false (F)
False
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The width of a DNA double helix
a. is constant. b. is narrower where adenine is present than where cytosine is present. c. is wider where purines are present than where pyrimidines are present. d. varies randomly. e. is wider where pyrimidines are present than where purines are present.
A mountain stream can be divided into several sections. In each of these sections the biological diversity varies greatly. What factors influence the diversity in this mountain stream?
What will be an ideal response?
__________ refers to an individual's observable traits. Fill in the blank(s) with the appropriate word(s)
A mechanism for increasing the genetic diversity of offspring is
a. mitosis. b. cloning. c. sexual reproduction. d. cytokinesis. e. fission.