The earliest photosynthetic autotrophs were probably:a
similar to the green and purple sulfur bacteria of today.
b. first formed about 1 billion years ago.
c. the first organisms to release oxygen.
d. obligate aerobes.
e. fermenting heterortrophs
A
You might also like to view...
As you stroll through a moist forest, you are most likely to see a _____
A) zygote of a green alga B) gametophyte of a moss C) sporophyte of a liverwort D) gametophyte of a fern
To prepare for a hiking trip in the Appalachian mountains you buy several field guides for the region from a used bookstore. You notice that the older guides list a single species of tiger swallowtail butterfly Papilio glaucus and an Appalachian morph of this species. However the newest guide list two separate species P. glaucus and P. appalachiensis. The authors of this guide state that the biological species concept was used in determining their classifications. What do you think led them to list two separate species of tiger swallowtail?
A. The discovery that P. glaucus and P. appalachiensis interbreed in the wild. B. The discovery that P. glaucus and P. appalachiensis have a genomic similarity of 99%. C. The discovery that P. glaucus and P. appalachiensis do not interbreed in the wild. D. The discovery that P. glaucus and P. appalachiensis have distinct differences in wing coloration. E. The discovery that P. glaucus and P. appalachiensis feed on different host plants.
Briefly describe the makeup of VNTRs (variable number tandem repeats)
What will be an ideal response?
What is the main role of the pigment molecules within the antenna or light-harvesting complex?
A. Absorb photons and transfer light energy to the reaction center chlorophyll. B. Oxidize water and release oxygen to the reaction center chlorophyll. C. Synthesize NADPH. D. Increase H+ concentration in the stroma. E. Pass electrons to the electron transport chain and then to NADPH.