What type of skeleton is found in annelids?
A) dermal skeleton
B) endoskeleton
C) exoskeleton
D) notochords
E) hydrostatic skeleton
Answer: E
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In which layer of the plant leaves does photosynthesis take place?
a. mesophyll b. xylem c. phloem d. epidermis
Logically, which of these should cast the most doubt on the relationships depicted by an evolutionary tree?
A. Some of the organisms depicted by the tree had lived in different habitats. B. None of the organisms depicted by the tree ate the same foods. C. Relationships between DNA sequences among the species did not match relationships between skeletal patterns. D. The skeletal remains of the organisms depicted by the tree were incomplete (in other words, some bones were missing). E. Transitional fossils had not been found.
The inner membrane of mitochondria folds back on itself to form
a. plastids. b. cristae. c. centrioles. d. nucleoli. e. microfilaments.
Which one of the following is NOT an example of behavior?
A. A plant bending toward a light B. A student sleeping in class C. The wind rustling fallen autumn leaves D. A cat purring