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
1. TRUE
2. FALSE - As populations get smaller, the degree of allelic diversity decreases. This can result in a population bottleneck if there are not enough individuals left or enough genetic diversity to reproduce sufficiently to re-form the population.
3. FALSE
4. FALSE
5. TRUE
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Using the following list of taxonomic groups, place them in order from least inclusive to most
inclusive, labeling the taxonomic hierarchy for each group. Canis canis, Carnivora, Animalia, Mammalia, Chordata, Canis, Canidae, Eukarya 1. (Least Inclusive) 2. 3. 4. 5. 6. 7. 8. (Most Inclusive)
What will be an ideal response?The size of a plant's seeds reflects an evolutionary trade-off. Large, heavy seeds contain ample nutrients to fuel seedling growth but may not travel far. In contrast, small seeds store limited nutrients but disperse far and wide. Human-cultivated crops typically have larger seeds than do their wild ancestors. How has human farming altered the evolution of these crops?
A. We grow the plants under conditions that favor the growth of larger seeds. B. By using fertilizers, the seeds do not need to store as many nutrients. C. We have created crop plants that are more competitive in the wild than their ancestors. D. Because we spread the seeds, we can spread more smaller seeds per acre, thus favoring these plants. E. We have removed the selection pressure favoring small seed size.
Lifelong immunity is conferred once an individual has had botulism and recovered
Indicate whether the statement is true or false
Which of the following statement is TRUE about transcription?
a. Transcription in prokaryotes does not differ from transcription in eukaryotes. b. Prokaryotes carry out transcription in the cytosol, whereas eukaryotes carry out transcription in the nucleus. c. Eukaryotes use RNA polymerase and prokaryotes do not. d. Prokaryotes synthesize double stranded RNA and eukaryotes do not. e. Eukaryotes synthesize double stranded RNA and prokaryotes do not.