The organelle that best enables an athlete's tissues to be metabolically active are
A. mitochondria.
B. ribosomes.
C. lysosomes.
D. contractile vacuoles.
E. smooth endoplasmic reticulum.
Answer: A
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Which statement about autotrophs is true?
a. Photoautotrophs are the most common ecosystem energy source. b. Chemoautotrophs depend on sunlight to generate energy. c. Photoautotrophs consist primarily of bacteria and archaea. d. Chemoautotrophs are typically found in grazing food webs.
Phytochemicals are
a. essential for survival. b. produced in laboratories exclusively. c. not essential but can prevent some disorders. d. cofactors for cellulose degradation. e. none of these.
Which of the following microorganisms have been referred to as energy parasites?
A) rickettsias B) vibrios C) chlamydias D) spirochetes E) Borrelia
Nucleoli are present during _____.
Fill in the blank(s) with the appropriate word(s).