Plants: haploid generation of a plant produces gametes (sperm and eggs) and is called the gametophyte; the diploid generation produces spores and is called the sporophyte/ diploid zygote.
1 You gain the most benefits and lessen the risks when you exercise in your target heart rate zone. 2  Usually this is when your exercise heart rate (pulse) is 60 to 80 percent of your maximum heart rate. 3  In some cases, your health care provider may decrease your target heart rate zone to begin with 50 percent.
According to Edward R. Laskowski, M.D., at the Mayo Clinic, the normal resting heart rate of an adult ranges between 60 to 100 beats per minute. If you're a trained athlete, your normal resting heart rate may be closer to 40 beats per minute. A lower heart rate means your heart is able to function efficiently. This is usually a sign of cardiovascular fitness. Remember, resting heart rates are measured when you aren't actively moving.