Which of the following is one of the domains of life?
What will be an ideal response?
Which of the following is one of the domains of life?
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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.
When DDT was first introduced, insects were very susceptible to it. The development of resistance to
DDT by insects was the result of a. special creation. b. natural selection of forms that expressed genes for resistance. c. the high biotic potential of insects. d. a naturally occurring example of inheritance of acquired characteristics. e. mutation induced by DDT.
All behavioral traits have an early onset. Indicate whether the statement is true or false
The first mammals very likely arose from
A. dinosaurs. B. therapsids. C. amphibians. D. thecodonts.