Answer:
focused attention selects to attend to one stimulus, divided tries to do many at once and responds to more than one
Explanation:
<span>The answer is that there will be no change.
The cardiac output is the volume of blood pumped by the heart per unit time.
Multiplying the stroke volume and the heart rate gives you the cardiac output. The cardiac output for a person at rest is approximately 5L per minute.</span>
Answer:1. White blood cells are part of the body's immune system. They help the body fight infection and other diseases.
2. Red blood cells have adaptations that make them suitable for this.
3. The blood would not clot in case of an injury.
4. Blood supplies essential substances and nutrients.
Explanation: 1. White blood cells are able to recognize viruses and/or infectious germs, which is how they fight off disease/sickness. It is also why we have vaccines. Vaccines put either dead or weakened parts of a germ into your body. Then, the white blood cells recognize it and fight it off the next time it enters your body.
2. They contain hemoglobin, a red protein that combines with oxygen. They have no nucleus so they can contain more of the hemoglobin. they are small and flexible so that they can fit through narrow blood vessels.
3. This will lead to excess blood loss and can even lead to the death.
4. Such as as sugar, oxygen, and hormones to our cells. It also carries waste away from the cells, this waste is eventually flushed out of the body in urine, feces, sweat, and lungs.
Genetic variation<span> occurs </span>mainly<span> through DNA mutation, gene flow (movement of genes from one population to another) and sexual reproduction</span>
