Two species of cattail (Typha) live in shallow water along the shoreline of ponds. Although T. agustifolia can live by itself in water 0-20 cm deep, in the presence of T. latifolia, it occurs only in water > 20 cm deep, whereas T
latifolia occurs in shallower water. In this example, T. agustifolia is limited by competition exploiting its A) ecological niche.
B) fundamental niche.
C) realized niche.
D) physiological niche.
C
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Ricin is toxic because it
a. binds to eukaryotic DNA. b. binds to eukaryotic mRNA. c. blocks food from entering the cell. d. inactivates ribosomes. e. binds to nerve tissue and causes paralysis.
Chromosomal translocation involves chromosome breakage and reattachment of the broken segment to a ________
Fill in the blank(s) with correct word
What process refers to dramatic phenotypic changes that sometimes occur in evolution, such as the
appearance of feathered wings during the evolution of birds? a. paedomorphosis b. gradualism c. macroevolution d. allopolyploidy e. microevolution
The organic nonprotein components that aid in enzyme functioning are called
A. chaperones. B. reactants. C. coenzymes. D. substrates. E. products.