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

Biology & Microbiology

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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

Biology & Microbiology

The above figure represents

a. neuromuscular junction. b. muscle fiber. c. transport proteins. d. action potential. e. none of these.

Biology & Microbiology

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

Biology & Microbiology

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

Biology & Microbiology