Gemmae function for
(a) sexual reproduction.
(b) water retention.
(c) anchorage of a liverwort thallus to the substrate.
(d) asexual reproduction.
(d) asexual reproduction.
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In an active state of a G protein
a. the ? subunit binds to a target protein and the ?? subunit remains bound to the receptor. b. the ? and ?? subunits both can bind to target proteins. c. the ?? and ? subunits both can bind to target proteins. d. the ? subunit can bind to a target protein and the ?? subunit remains bound to the receptor.
A _______ is made of all the populations of all species in a habitat.
a) ecosystem b) symbiosis c) community d) niche
The idea that the same geologic processes, occurring over millions of years, have formed Earth's surface is known as ____.
A. the theory of catastrophism B. plate tectonics C. continental drift D. uniformitarianism E. the theory of relativity
The components of the second line of defense against microbes may be characterized as
A) responders to invasion. B) passive barriers. C) mechanisms to strengthen the first line of defense. D) detecting the unique features of specific pathogens. E) both passive barriers and detecting specific pathogen features.