During exercise, the blood returning to a person's heart contains hemoglobin that is about ______ saturated.  

A.  3%
B.  22%
C.  35%
D.  75%
E.  97%


C.  35%

Biology & Microbiology

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The first observational evidence that genes may be inherited together rather than by simple Mendelian inheritance was provided by __________

A. Mendel B. Morgan and Bridges C. Bateson and Punnett D. Boveri and Sutton E. None of the answers are correct

Biology & Microbiology

Animal cells use exocytosis to secrete all of the following except

A) cell wall material. B) mucus. C) peptide hormones. D) milk proteins. E) digestive enzymes.

Biology & Microbiology

Some flowers bloom in the spring, while others bloom in the summer. This is an example of reproductive isolation.

A. prezygotic B. sympatric C. allopatric D. parapatric E. postzygotic

Biology & Microbiology

You pick up a vertebra to identify it and note that the transverse processes contain foramina. This unique feature identifies the vertebra as coming from the ________ region of the vertebral column.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology