In the 1800s, northern Minnesota was covered with heavy forests. After the forests were logged off, the land was sold for farms. The majority of the farms failed because the land became waterlogged. Why did this happen?
What will be an ideal response?
Plants absorb and hold huge amounts of water. Without the trees to absorb the water, the water table rose and the land flooded.
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The importance of phage-mediated lateral gene transfer by virioplankton was illustrated by the fact that cyanophages thought to infect Synechococcus and Prochlorococcus carry the structural gene for ________.
A. a photosynthetic reaction center protein B. phycocyanin production C. nitrogenase D. All of the choices are correct.
Bryophytes differ from other land plants in that they do not have
a. lignified water transport tissue. b. protected sporophyte embryos. c. spores. d. a gametophyte generation. e. a diploid generation.
A(n) ______ is a set of signs and symptoms that define a particular disease
Fill in the blank(s) with the appropriate word(s).
What is an organelle that pinches off portions of its membrane to form a transport vesicle?
A. Mitochondrion B. Chloroplast C. Nucleolus D. Golgi body E. Peroxisome