Which subatomic particles can vary between isotopes of the same element, without changing the observed chemical properties?
(a) electrons
(b) protons and neutrons
(c) neutrons
(d) neutrons and electrons
(c)
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Any change in allele frequencies in a gene pool is called ____
a. natural selection b. macroevolution c. microevolution d. mutation e. artificial selection
Which kingdom contains "extremophiles"?
a. eubacteria b. archaebacteria c. fungi d. protista
All of the following statements describe eukaryotic cells EXCEPT:
A. Their plasma membrane usually contain Sterols and carbohydrates B. They have membrane-bound organelles (example include mitochondria and endoplasmic reticulum) C. They have 80S ribosomes (70S in organelles) D. They have usually a single circular chromosome E. They may possess a cell wall but not of peptidoglycan
Current thought indicates that marsupials and eutherians are more closely related to each other than either is to monotremes.
Answer the following statement true (T) or false (F)