Which protists have two flagella that make them spin and move forward?
a. dinoflagellates
b. ciliates
c. apicomplexans
d. rhizarians
e. euglenoids
a
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This enzyme is responsible for breaking the backbone on the DNA double helix
A. supercoilase B. topoisomerase II C. nucleoidase D. transcriptase E. polymerase
Describe the observational differences between long-period and short-period comets
What will be an ideal response?
Undersecretion of growth hormone in childhood results in
a. pituitary gigantism. b. acromegaly. c. pituitary dwarfism. d. diabetes insipidus. e. cretinism.
Which of the following statements is true?
A) The temperate deciduous forest is composed of a high diversity of deciduous trees that lose their leaves in the fall because of low soil fertility. B) Agriculture is often not very successful in grasslands because of the poor soils. C) The high species diversity of a tropical rain forest is supported by a high diversity of soil organisms, high soil fertility, and high rainfall. D) Agriculture is often not very successful in a tropical forest because of the poor soils.