Carbohydrates consist of carbon, hydrogen and oxygen in a ratio of ____________________. Fill in the blank(s) with the appropriate word(s)
ANSWER: 1:2:1
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Feather color in budgies is determined by two different genes, Y and B, one for pigment on the outside and one for the inside of the feather. YYBB, YyBB, or YYBb is green; yyBB or yyBb is blue; YYbb or Yybb is yellow; and yybb is white. A blue budgie is crossed with a white budgie. Which of the following results is NOT possible?
A) green offspring only B) yellow offspring only C) blue offspring only D) green and yellow offspring E) a 9:3:3:1 ratio
Yeast research with autonomously replicating sequences (ARS), along with digestion of chromatin with DNase I, have led scientists to determine that
A) DNA is not protected inside a nucleosome. B) ARSs are really plasmids. C) ARSs bond irreversibly to replication enzymes. D) origins of replication are accessible regions of DNA devoid of nucleosomes.
Bird wings and insect wings are considered to be:
a. homologous structures. b. homogenous structures. c. vestigial structures. d. divergent structures. e. homoplastic structures.
In scleroderma, patients develop a buildup of collagen in their organs. Scleroderma is a disease of what tissue type?
A. Muscle tissue B. Epithelial tissue C. Connective tissue D. Nervous tissue