Answer the following statements true (T) or false (F)
1. Two species of three-spined stickleback fish live in a single lake in British Columbia. They are closely related but occupy different niches. They exist nowhere else. These species most likely arose by sympatric speciation from a single species of three-spined stickleback.
2. The pace of evolution remains constant despite sudden environmental shifts such as climate change.
3. Although most genetic sequence information is obtained from living species, it is sometimes possible to obtain DNA from small tissue samples of extinct species for use in constructing phylogenetic trees.
4. Alan Cooper, Cécile Mourer Chauviré, Geoffrey Chambers, Arndt von Haeseler, Allan Wilson and Svante Pääbo investigated the evolutionary relationships among some extinct and living species of flightless birds using tissue samples from museums and from living birds. This is an example of discovery-based science.
1. TRUE
2. FALSE
3. TRUE
4. TRUE
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What evidence exists that some of the asteroids were geologically active in the distant past?
a. A few of the larger asteroids show similar reflectance spectra (colors) similar to achondrite stony lava-like meteorites. b. A few of the larger asteroids show similar reflectance spectra (colors) similar to carbonaceous chondrite meteorites. c. A few of the larger asteroids show similar reflectance spectra (colors) similar to Jovian planets.
An EEG is
a. a graph showing brainwave patterns. b. an oscilloscope pattern showing an action potential of a nerve. c. an oscilloscope pattern showing a muscle undergoing contraction. d. a graphic representation of the function of a heart. e. a state of sleep when dreaming occurs.
Which innovation(s) places birds in a separate class?
a. wings only b. high metabolic rate c. wings and flight d. high metabolic rate and dry skin e. wings, flight and high metabolic rate
Pharmacogenomics is the study of how
A) the genome affects responses to drugs. B) the genome leads to new drug discoveries. C) the genome affects microbial communities in the body. D) the genome is affected by drug use. E) medicines influence the genome of cancer cells.