Darwin's evidence that evolution occurs included
A. the existence of fossils that closely resembled living specimens.
B. unique but similar species on several nearby islands.
C. a distinctive distribution of plants and animals in lands with similar climates that were not physically connected.
D. All of these were Darwin's evidence for evolution.
Answer: D
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A microscope that exposes specimens to ultraviolet, violet, or blue light and forms an image with the light emitted at a different wavelength is called a ________ microscope.
A. phase-contrast B. scanning electron C. dark-field D. fluorescence
Eukaryotic chromosomes contain two general domains that relate to the degree of condensation. These two regions are ________
A) void of introns B) called heterochromatin and euchromatin C) separated by large stretches of repetitive DNA D) each void of typical protein-coding sequences of DNA E) uniform in the genetic information they contain
In which organism would you likely find a chlorosome?
a. Purple nonsulfur bacteria b. Purple sulfur bacteria c. Green sulfur bacteria d. Cyanobacteria e. Algae
Due to character displacement, two closely related species may differ most morphologically when they
A. occupy different niches. B. share a common ancestor. C. are sympatric. D. occupy the same niche. E. are allopatric.