three-spined sticklebacks (gastrerosteus aculeatus) are small fish that live in both marine and freshwater environments. a biologist genotypes a population living in freshwater cranby lake at the eda gene, and finds 17 fish with genotype mm, 50 with genotype mf, and 83 with genotype ff. is evolution likely occuring in the population of sticklebacks in cranby lake

Select the correct answer from each drop-down menu. during the day, plants produce by splitting water molecules in the light-dependent reactions of photosynthesis. at the same time, plants use cellular respiration to produce some of the needed by the light-independent reactions to make sugars. during the night, plants produce because takes place.

Where does the information about where each transcription factor binds originate?

This is a typical grassland food web. it is also a small picture of an important cycle on earth: the carbon cycle. describe how the carbon gets into this food web. a) bacteria and fungi, the decomposers, recycle carbon from dead organisms. b) carbon is found in the grass and is passed from one level to the next in this food web. eliminate c) all living things give off carbon dioxide as a by-product of respiration and it is released into the atmosphere. d) plants use carbon dioxide as a reactant in photosynthesis, to make usable chemical energy in the form of a sugar.