carbon cycle: fossil fuels
What will be an ideal response?
whenever we burn a substance which contains carbon, we release CO2 in the atmosphere
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Energy captured by producers usually passes through no more than four or five trophic levels. Even in ecosystems with many species, the number of participants in each food chain is limited. The inefficiency of energy transfers constrains the length of food chains. What factors limit the efficiency of energy transfers?
What will be an ideal response?
Double strand DNA fragments are separated by size using
A) restriction analysis. B) FISH. C) PCR. D) northern blotting. E) gel electrophoresis.
Suppose you have friends who scoff at the idea of participating in a conservation group in your community. How would you convince them that protecting biodiversity directly benefits everyone, including them?
What will be an ideal response?
The first jawless fishes evolved by about ____ million years ago
a. 120 b. 270 c. 380 d. 480 e. 650