________ causes microtubules to form tight bundles in nerve cells.
A) Dynein
B) Actin
C) Tau
D) Kinesis
E) Tubulin
C) Tau
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What are the key characteristics of arthropods?
A. Fused bodies, no exoskeleton, and jointed appendages B. Segmented bodies, tough exoskeleton, and jointed appendages C. Segmented bodies, no exoskeleton, and jointed appendages D. Fused bodies, tough exoskeleton, and jointed appendages
Which statements about the notochord is FALSE?
a. It is lost when it is replaced by the spinal cord. b. It develops in chordate embryos. c. It develops from mesodermal tissue. d. It induces formation of the neural plate. e. It grows along the longitudinal axis of the organism.
You construct two species-area relationships for terrestrial plants, modeling both with the relationship log S = log c + z log A. One relationship is for data collected from islands of different sizes. The other is for data collected from continental areas over a similar size range. Which of these relationships is likely to have the greater slope, z?
A) the one for islands B) the one for continental areas C) neither A nor B
A plant researcher wants to construct a synthetic cellulose fiber from 20 glucose molecules. How many molecules of CO2 and glyceraldehyde-3-phosphate are needed to construct the fiber?
A. 20, 60 B. 120, 40 C. 120, 120 D. 20, 40 E. 120, 60