Which of the following biomes will receive migratory animals, such as caribou, from the tundra?
A. polar ice
B. grasslands
C. temperate deciduous forest
D. coniferous forest
E. tropical rain forest
Answer: D
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In patients who do not have HIV, which underlying condition is considered a risk factor for acquiring PCP?
a. Malaria b. Cystic fibrosis c. Cytomegalovirus d. Myasthenia gravis
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
Linnaeus developed his classification system for organisms according to
A. fixity of species and the sequential ladder of life. B. Lamarck's theory of evolution. C. a theory of descent by modification. D. Darwin's theory of evolution.
The accompanying figure shows data on composite values for beak size, beak shape, and body size for the medium ground finch (Geospiza fortis) inhabiting Daphne Major. Complete data sets were collected from 1973 onward
For each of the three graphs in the accompanying figure, the 95% confidence intervals are shown as vertical bars extending above and below each data point for each year. The fact that many of these 95% confidence intervals do not overlap with the data from 1973 (the original reference point for this study) do not overlap reveals that ________. A) no detectable change in these phenotypes was measured B) no evolution can be documented C) detectable change in phenotypes was observed, but the changes were not heritable D) detectable evolution by natural selection did occur E) None of these is an accurate statement.