When two lines stem from a single branch point on a phylogenetic tree, what are they called?
a. branch points
b. leaves
c. sister taxa
d. species
c. sister taxa
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Which of the following are characteristics of arthropods?
1. protostome development 2. bilateral symmetry 3. a pseudocoelom 4. three embryonic germ layers 5. a closed circulatory system A) 1 B) 1 and 2 C) 1, 2, and 4 D) 2, 3, 4, 5 E) 2 and 3
The above figure represents
a. neuromuscular junction. b. muscle fiber. c. transport proteins. d. action potential. e. none of these.
The application of ammonia fertilizers can alter soil
chemistry resulting mostly in the loss of __________ through ion exchange. a. iron and phosphorus b. nitrogen and hydrogen c. calcium and magnesium d. zinc and iron e. nitrates and nitrites
Based on its function in detoxifying drugs, you would expect to find a large amount of smooth ER in ________ cells
A) brain B) liver C) intestinal D) muscle