Answer: genetics and mutation generate some of the variety that natural selection acts on
Explanation:
Usually you can change that if you go to bed at like maybe say 7:30pm or maybe even 8, sometimes if you do that then you won't be tired in the morning. Hope this helped, have a great day! :D
Answer: the carrying capacity for adult giraffes in this area is: 6.
Explanation: [ 450 pounds divided by 75 = 6. ]
Fun Fact - Giraffes can drink up to 10 gallons of water a day and spend 16-20 hours a day feeding, their favorite food is Acacia Leaves.
Due to a reduction in blood volume due to blood donation, the stroke volume will decrease. However, to compensate for this, your heart rate will increase so as to maintain your cardiac output. Cardiac output is stroke volume multiplied with heart rate.
Maintaining normal cardiac output is critical so the whole body receives enough nutrients and oxygen.
