Based on the fact that CO2 limits photosynthesis in some current environments, what might you conclude about the evolution of photosynthesis?

A. Photosynthesis evolved when environmental concentrations of CO2 were low.
B. Photosynthesis evolved when environmental concentrations of CO2 were high.
C. CO2 levels likely did not have a bearing on the evolution of photosynthesis.
D. Photosynthesis evolved in a greenhouse.


B. Photosynthesis evolved when environmental concentrations of CO2 were high.

Biology & Microbiology

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Which process is responsible for the movement of solids into some animal cells?

a. pinocytosis b. osmosis c. receptor-mediated endocytosis d. facilitated diffusion e. phagocytosis

Biology & Microbiology

The hypothesis that says, "as one species changes so will the other," is called the ________

a. Law of Independent Assortment b. Red Queen hypothesis c. Law of Thermodynamics d. Principle of Genetics e. Evolutionary Divergence

Biology & Microbiology

Genetic goitrous cretinism and alkaptonuria are metabolic disorders in the ____ pathway

a. nucleic acid b. thalassemia c. phenylalanine d. paraoxonase e. lipid biochemical

Biology & Microbiology

Sexual reproduction and meiosis generate genetic variability by

What will be an ideal response?

Biology & Microbiology