Glacier ice occupied about __________% of Earth's land during the last Ice Age, then began retreating
about 17,000 years ago. Today, glacier ice occupies about __________% of the land surface.
a. 30; 10.
b. 50; 10
c. 73; 50
d. 80; 50
e. 15; 1
A
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Conserved indels are
A. a type of transposable sequence characteristic of particular genus and useful for taxonomic analysis. B. sequences in eukaryotic mRNAs that are removed by RNA splicing. C. sequences of protein coding genes that are found altered in related species due to their tendency to accumulate small deletions. D. a type of signature sequence particularly useful for phylogenetic analysis.
An example of commensalism involves which two organisms?
a. acacia trees and ant colonies b. bacteria and legumes c. cattle egrets and cattle d. plants and pollinators e. tapeworms and pigs
The four eras each represents an equal time of Earth's history.
A. True, the four eras are each roughly the same length of time B. False, the four eras are vastly different in their durations
Regarding Pasteur's experiments with the S-neck flask, which of the following statements is true?
a. There was air involved. b. There was a food source involved. c. Any possibility of contamination was removed. d. All microorganisms were killed before beginning. e. All of these.