When making scientific decisions in one's life, it is best to ask questions, gather and evaluate information and evidence, and carefully consider the sources of the material. This process is called ________
Fill in the blank(s) with correct word
critical thinking
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True or false: Fetal movement can first be felt by the mother in the second trimester of development
A. true B. false
Although carbon dioxide contains carbon, it is
not considered an "organic" compound because a. it is not found in the earth's crust. b. it is not present in living cells. c. the carbon atom is not bonded to at least one hydrogen atom. d. the carbons are not in chains or rings. e. it is too small.
Which is NOT part of the nitrogen cycle?
a. denitrification b. deammonification c. nitrogen fixation d. ammonification e. uptake by autotrophs
Which of the following situations would be MOST likely to produce a new species?
A. Several individuals join an existing population and introduce several new, beneficial alleles. B. A volcano erupts and kills all of the frogs on an island, along with many other species. New frogs colonize the island and begin reproducing rapidly because there are no longer any frog predators. C. A group of polyploid individuals arises by an abnormal meioses. The polyploids can only produce viable offspring by mating with each other. D. An existing species becomes subdivided by a glacier and the resulting groups remain physically isolated from each other for thousands of years. When the glacier melts, the two groups are able to interbreed. E. Several individuals colonize a new area and establish a population. Migration between the two populations is common.