Consider the metabolism of a chlorophyll-based phototroph. In oxidative phosphorylation during cell respiration, the source of energy is ________ whereas in photophosphorylation the source of energy is ________.

A. ATP; light
B. highly reduced organic compounds; light
C. NADH; NADPH
D. electron transport chain; chlorophyll


Answer: B

Biology & Microbiology

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Choose the true statements about the diversity of Darwin's finches on the Galápagos Islands. Check all that apply. 

_____ All of the finch species share a common ancestor that colonized the islands. _____ Prior to the adaptive radiation of finches, there were no unoccupied habitats in the Galápagos Islands. _____ Competition among finches for food sources led to character displacement of beak shapes. _____ Beak shape is not an important key innovation.

Biology & Microbiology

When all continents were fused into one during the Permian Period, they were called

a. Laurasia. b. Pangaea. c. Gondwanaland. d. Eurasia. e. Amerasia.

Biology & Microbiology

The theory illustrated by Figure 21-1 is used to explain the origin of:

a. anaerobes. b. prokaryotes. c. eukaryotes. d. vascular plants. e. protobionts

Biology & Microbiology

Which of the following cell types conducts water most rapidly through a plant?

A. sieve tubes B. phloem C. vessel members D. parenchyma cells E. sclerenchyma cells

Biology & Microbiology