Kristen is running a half marathon. by her tenth minute of running, her breathing rate has increased from her resting rate. which statement best describes how her tissues are responding to her running? a. they need more oxygen to function, so gas exchange needs to decrease. b. they need more oxygen to function, so gas exchange needs to increase. c. they need more carbon dioxide to function, so gas exchange needs to increase. d. they need more carbon dioxide to function, so gas exchange needs to decrease.

Option B, "They need more oxygen to function, so gas exchange needs to increase. "

Kristen is running a half marathon. By her tenth minute of running, her breathing rate has increased from her resting rate.

Which statement best describes how her tissues are responding to her running?

They need more oxygen to function, so gas exchange needs to decrease.

They need more oxygen to function, so gas exchange needs to increase.**

They need more carbon dioxide to function, so gas exchange needs to increase.  

They need more carbon dioxide to function, so gas exchange needs to decrease.

Explanation:

took test

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explanation:

both male and female gametes are produced by meiosis of the germ cells. therefore, both male and female gametes are haploid. one male and one female gamete unite during the fertilization to form the diploid zygote. in seed bearing plants, pollen grain is the male gametophyte, which produces sperm cells.