Which of the following statements is a correct distinction between autotrophs and heterotrophs?
A) Cellular respiration is unique to heterotrophs.
B) Only heterotrophs have mitochondria.
C) Autotrophs, but not heterotrophs, can nourish themselves beginning with CO2 and other nutrients that are inorganic.
D) Only heterotrophs require oxygen.
C
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Matching. Choose the most appropriate letter
1. ___ Thermus aquaticus 2. ___ Cyanidium caldarium 3. ___ Amoeba discoides 4. ___ nanobes 5. ___ proto-cells 6. ___ stromatolites 7. ___ cyanobacteria 8. ___ Bangiomorpha pubescens 9. ___ glaucophyte A. contain DNA, but may be too small to be alive B. simple transitional forms between early organic compounds and the first living cells C. red alga resident of hot springs D. first organisms with the noncyclic pathway of photosynthesis E. source of the heat-resistant enzyme used in PCR F. offered support for endosymbiosis G. dome-shaped fossil remains of photoautotrophic bacteria (some nonfossil structures also form. H. protist with photosynthetic organelles that resemble cyanobacteria I. earliest known organism that can be assigned to a modern group
The reactions of the citric acid cycle take place in the matrix of the mitochondrion
__________________ Indicate whether the statement is true or false.
Oogenesis begins with which of these structures?
a. sperm b. secondary spermatocyte c. polar bodies d. spermatids e. primary oocyte
Which of the following are used to distinguish species from one another?
A. differences in the physical characteristics of organisms B. differences in behavior C. differences in metabolism D. All of the choices are correct.