Why are scientists separating the protists into several different groups?
What will be an ideal response?
The protists do not form a monophyletic group. There is much diversity and many are more closely allied with other groups (plants, animals, fungi) than with other protists.
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________ incorrectly suggested that DNA has a triple helix structure.
A) Linus Pauling B) James Watson and Francis Crick C) Maclyn McCarty D) Rosalind Franklin
The bivalves and worms have red flesh due to presence of:
a. pigments absorbed from their prey items. b. hemoglobin. c. chromatophores. d. pigments similar to other deep-sea organisms due to a lack of light. e. structural colors for camouflage.
The letter “C” in the above figure represents
a. trigger zone. b. output zone. c. input zone. d. conducting zone. e. none of these.
The ectodysplasin gene of stickleback fish in fresh and salt waters provides a good example of pleiotropy, because it ________
A) affects both growth rate and bony armor of a stickleback B) includes a DNA-binding homeodomain C) has been duplicated repeatedly to create a whole family of variants D) has been transferred from another organism E) allows different populations of stickleback to interbreed