Is it correct to state that human evolution did not proceed from one species to the next, each evolving to be more modern? Why or why not?
What will be an ideal response?
There were many species within the hominin lineages, which actually represent an adaptive radiation event. Many species coexisted at the same time. Some species dominated the landscape for long periods of time, while others seem to have been quick evolutionary dead ends. Only one species, Homo sapiens, did not go extinct.
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Answer the following statement(s) true (T) or false (F)
1. Researchers in England found that, for three out of four habitat types they were studying, the most efficient strategy was to create a system of stepping stones linking existing habitat clusters. "Stepping stones" are a type of corridor. 2. The degree of allelic diversity of a population is independent of its size. 3. If the tilt of Earth's axis relative to its plane of orbit was increased to 30 degrees, the seasons in Boston would become less distinct. 4. Homo sapiens have existed on earth for 2% of the earth's history. 5. Prokaryotic organisms were the only life-forms present on earth for almost 2 billion years. Multicellular eukaryotes have only been around for about 25% of earth's history
Which type of speciation occurs when there is a shift in the chromosomal number?
a. Allopatric b. Gene flow c. Stabilizing selection d. Sexual selection e. Sympatric
Which of the following is considered to be a "clean" energy source?
A. geothermal energy B. burning coal C. nuclear power D. burning natural gas
We know the detailed molecular structure and mechanism of action of the transmembrane protein bacteriorhodopsin. This protein uses sunlight as the source of energy to pump ______ out of the cell
(a) ATP (b) H+ (c) K+ (d) Na+