The structural combination of DNA and protein forms ribosomes.
a. true
b. false
a. true
Biology & Microbiology
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Conifers have male and female cones. What are the male cones called?
a. ovulate b. megasporocyte c. staminate d. monoecious
Biology & Microbiology
Diffusion during which the substance to be transported binds selectively to a membrane-spanning protein, which helps the process along, is called ________.
a) simple diffusion b) active transport c) facilitated diffusion d)facilitated osmosis e) osmosis
Biology & Microbiology
Homeostasis provides what kind of internal environment?
A. Positive B. Stable C. Limiting D. Changing E. Chemical and physical
Biology & Microbiology
Which antibodies in tears, saliva, and mucus help protect mucosal surfaces from many pathogens?
a) IgD b) IgA c) IgG d) IgM
Biology & Microbiology