Which of the following refers to photosynthesis performed by bacteria with the use of water as the donor of electrons?
A. oxygenic
B. anoxygenic
C. hetertrophic
D. phototropic
Ans: D. phototropic
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In the temperate rain forest, the establishment of new tree seedlings is limited by the lack of light reaching the forest floor
Indicate whether the statement is true or false
Which of the following is the best definition of epitope?
A) specific regions on antigens that interact with T-cell receptors B) specific regions on antigens that interact with MHC class molecules C) specific regions on antigens that interact with haptens D) specific regions on antigens that interact with antibodies E) specific regions on antigens that interact with perforins
What do echinoderms and chordates have in common?
A. Protostome development B. Endoskeletons C. Ecdysis D. Dorsal nerve cords
____ is the maintenance of a stable internal environment in the face of a changing external environment
Fill in the blank with the appropriate word.