A derived character that is shared by all members of a clade is called a ______________ of that clade.
Fill in the blank(s) with the appropriate word(s).
synapomorphy
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Which molecule represents one of the best examples of a commonly shared signaling pathway connected to memory
in invertebrates and vertebrates?
a. cyclic AMP b. cyclic GMP c. RNA cyclase d. RNA binding protein e. non-responsive binding protein
What is the map distance between the pr and cn genes?
In Drosophila, the autosomal recessive pr and cn mutations cause brown and bright-red eyes, respectively (wild-type flies have brick-red eyes). Flies who are homozygous recessive at both pr and cn have orange eyes. A female who has wild-type eyes is crossed to an orange-eyed male. Their progeny have the following distribution of eye colors:
A) 20 m.u.
B) 2 m.u.
C) 4 m.u.
D) 46 m.u.
E) 8 m.u.
Why did internal fertilization likely evolve?
A. To increase the chances of successful fertilization. B. As a response to copulation. C. Because there were no safe places to lay eggs. D. As an adaptation to life in a terrestrial environment.
A host-parasite interaction between two species is one in which:
a) both species suffer negative consequences. b) one species is harmed, but the other benefits. c) both species benefit. d) one species is harmed, but the effect on the other is neutral