Several species of fireflies are active on the same summer nights in the same fields. Males and females recognize one another by their distinctive flashing patterns. This is an example of what kind of reproductive isolation?
A. pre-zygotic, behavioral isolation
B. pre-zygotic, temporal separation
C. pre-zygotic, ecological separation
D. post-zygotic, lock and key
E. post-zygotic, ecological separation
A
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When two homologous chromosomes align and exchange a segment of their genetic material, which can make linked traits seem independent of one another, this process is called _________.
a. epistasis b. recombination c. reciprocal cross d. codominance
Collagen fibers are characteristic of which tissue?
a. muscle b. epithelial c. connective d. nervous e. embryonic
The scientific field of study that analyzes genes and proteins to identify targets for therapeutic drugs is
___________________. Fill in the blank(s) with the appropriate word(s).
You find a strange infection in your mouth and visit your dentist. The dentist said the new organism was prokaryotic because it had ________
A) circular DNA B) DNA in the nucleus C) relatively large cells D) membrane-bound organelles