Which of the following statements is true?
a. Chromosomes are classified into two categories, the sex chromosomes that determine gender and autosomes that determine non-gender related traits.
b. Homologous chromosomes differ in banding patterns, the traits they code for and size.
c. While sex chromosomes determine different genders they look the same until they are stained.
d. In humans all 46 chromosomes have an identical match called the homologue.
Answer: a. Chromosomes are classified into two categories, the sex chromosomes that determine gender and autosomes that determine non-gender related traits.
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All biological research is undertaken with the explicit or implicit recognition that ____
a. Charles Darwin's view of evolution put forth in The Origin is without error b. all forms of life are related and have evolved from ancestral forms c. all species share the same common ancestor d. the products of evolution are easily predicted e. the theory of evolution can be ignored unless the research is explicitly examining evolutionary process
Which statement about the phosphorus cycle is true?
a. The natural weathering of rocks sends phosphate into lakes and oceans. b. Phosphate from geothermal vents causes dead zones in lakes. c. Phosphate enters the oceans primarily through precipitation. d. The average phosphate ion resides in the ocean for less than 500 years.
Which protein did Davis, Weintraub, and Lassar look for in their fibroblast colonies to positively identify the presence of skeletal muscle cells?
A. collagen B. myofibril C. tubulin D. myosin E. actin
During translation, nucleotide bases are read ___ at a time.
a. four b. two c. three d. one