Which gender has a higher heart rate?

Females

Explanation:

The average adult male heart rate is between 70 and 72 beats per minute, while the average for adult women is between 78 and 82 beats. This difference is largely accounted for by the size of the heart, which is typically smaller in females than males. :)

a adaptation is when organism changes itself to fit the environment

ex. when its cold outside i wear a jacket

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answer: - b cells

explanation: -

so, the b cells mediate their action by identifying the antigens present on the surface of the pathogens and then producing antibodies in return to mediate its effect.