Tidepool organism adaptations to changing environmental conditions are most similar to those of animals living in the ____
a. supralittoral zone
b. salt marsh
c. sandy beach
d. mangrove forest
e. open ocean
B
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In gymnosperms, which of the following structures or cell types would be considered spores? Select all correct choices
A. pollen precursor cells in the pollen cones B. mature pollen in the pollen cones C. seeds with the potential to germinate D. egg precursor cells in the ovule cones E. mature eggs in the ovule cones
Which of the following statements about components of the flu vaccine and their intended function is true?
A. Gelatin or sorbitol is used to enhance the ability of the immune system to detect the virus. B. Formaldehyde is used to inactivate toxins from the virus or bacteria that may have been present during production. C. Antibiotics are used as a preservative in multidose vials of vaccine in order to prolong their shelf life. Antibiotics allow the vaccine to withstand extreme temperature changes. D. Aluminum is included to prevent the growth of bacteria during vaccine preparation and storage.
Which of the following processes exhibit saturation (transport rate plateaus at high concentration)?
a. Simple diffusion b. Facilitated diffusion c. Ion channel d. Secondary active transport
Ornithosis, a disease of birds that can be transmitted to humans, is caused by
A) Yersinia pestis. B) Klebsiella pneumoniae. C) Chlamydophila psittaci. D) Mycoplasma pneumoniae. E) Chlamydophila pneumoniae.