Fossils and DNA evidence indicate that birds are members of a clade in which group?
A. mammals
B. reptiles
C. amphibians
D. fishes
E. They are in their own group.
Answer: B. reptiles
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The deactivation of NK cells due to binding of NK receptors to MHC I proteins is called
A) promoting. B) phagocytosis. C) licensing. D) neutralization.
Chloroplasts are the site of ____
a. DNA synthesis b. cellular digestion c. protein synthesis d. photosynthesis e. lipid synthesis
When comparing the outside and inside halves of a cell membrane's phospholipid bilayer, the
composition of lipids on the two surfaces is ____.
a. asymmetrical b. identical c. not identical, but symmetrical d. highly random and varies throughout the cell e. a mirror image
The ____ spend most of their lives as individual haploid organisms
a. cellular slime molds b. plasmodial slime molds c. amoebas d. multi-celled protists e. single-celled protists