According to the __________, the universe formed about 13 to 15 billion years ago and is still
expanding. Fill in the blank(s) with the appropriate word(s).
bang model
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The analysis of energy flow in an aquatic ecosystem in Silver Springs, Florida revealed that ____
a. energy flows are difficult to measure b. most of the sun's energy is harvested c. only a little energy is transferred from one trophic level to the next d. the energy flow in carnivores is equal to that of producers e. trophic energy losses are not significant
The above figure represents
a. membrane attack complex; pores in bacterial cell b. macrophage attack complex; fluids released from pores c. pores for mucus secretion ciliated lung tissue d. macrophages; muscle tissue e. none of these
A lichen is an example of a commensalistic relationship between a fungus and an alga
Indicate whether the statement is true or false
Since the membrane is more permeable to K+ than to Na+,
Select one: a. there are always more positive ions outside the membrane than inside. b. there are always more negative ions outside the membrane than inside. c. the outside of the membrane is always negative. d. the outside of the membrane is always neutral. e. there really is never a resting potential. Feedback