Based on molecular analysis, which of the following appears to be least meaningful for inferring
animal phylogenic relationships?
a. presence or absence of tissues
b. mitochondrial DNA sequences
c. radial symmetry in the Radiata
d. body cavity differences
e. Hox gene sequences
D
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Capsules are particularly important for
A) making bacteria more vulnerable to host defense mechanisms. B) making bacteria less pathogenic. C) protecting bacteria from host defense mechanisms. D) allowing bacteria to become more phagocytic.
The most parsimonious inference about the evolution of parental care behavior in crocodilians and
birds is
a. it evolved once in the common ancestor of the two groups. d. it is a learned behavior. b. the derived character state is an apomorphy. e. parental care arose due to coevolution. c. it evolved numerous times within each lineage.
The control of the temperature of the body is an example of which of the following?
a. homeostatic mechanism b. positive feedback system c. endocrine function d. negative feedback system e. both homeostatic and negative feedback systems
Reactions that are both catabolic and anabolic are amphibolic.
Answer the following statement true (T) or false (F)