Which early scientist proposed that cells arise only from preexisting cells by a process of division?
a. Anton van Leeuwenhoek
b. Robert Brown
c. Matthias Schleiden
d. Theodor Schwann
e. Rudolf Virchow
ANSWER: e
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When culturing for Mycobacterium, rapid-growers usually produce colonies within how many days after subculture?
a. At least 7 days b. Longer than 7 days c. 3 to 4 days d. 2 to 3 days
Saltmarsh cordgrass is known as a(n)_____ because patches slow the velocity of incoming tides and stabilize stormy
beach habitat.
a. parasite b. foundation species c. symbiote d. mimic e. ecotone
The leucine zipper has a unique structure compared to the other transcription factors because it is a
dimer. __________________ Indicate whether the statement is true or false.
Nonsteroid hormones cannot cross the plasma membrane of cells, yet still have the ability to influence cell activity. Explain how this is possible
What will be an ideal response?