Answer:
1. Each Giraffe's neck length is different
2. The tall neck Giraffes reproduced and their off spring inherited their genes
3. A drought occurred.
Explanation:
Answer:
Active transport requires chemical energy because it is the movement of biochemicals from areas of lower concentration to areas of higher concentration. On the other hand, passive transport moves biochemicals from areas of high concentration to areas of low concentration; so it does not require energy
Answer:
Mold fossil.
Explanation:
The clamshell shaped cavity is a mold fossil owing to the fact that the clamshell died, its body deteriorated but while it is deteriorating it is being covered by sediment. As a result when the clamshell completely disappears it will leave an impression on the sediment, in other words, it is a mold of the prehistoric clamshell.
Blood viscosity is the friction red blood cells encounter when moving past each other.
Blood viscosity is the biophysical property of blood which describes its state of being thick, and sticky as a result of internal friction. Blood viscosity determines how red blood cells moves through the blood vessels. The main factors that determine blood viscosity are; hematocrit, plasma viscosity and red blood cell deformability and aggregation.
