If an ovum is not fertilized ESTROGEN production decreases and the LINING OF THE WOMB is shed. As a woman of child bearing age is approaching ovulation, the body increases the production of estrogen hormone, which causes the lining of the uterus to thicken and which also provide a sperm-friendly environment. If fertilization do not take place the body reduces the production of estrogen and the thickened uterus lining will be shed.
Answer: Van der Waals forces
Explanation:
Van der Waals forces are weak intermolecular forces that depend on the distance between two particles. They are caused by correlations in the change in polarization between two nearby particles. To put it in other words, when a particle changes its polarization (becomes more positive on one end and more negative on the other), so does the adjacent particle, and the next one, and so on. This causes these particles to stick together weakly.
The tiny "hairs" increase the surface area of the gecko's feet in contact with the wall, which makes the bond stronger and allows it to support all of its weight.
Because experiments have shown that geckos stick well to both hydrophobic and hydrophilic surfaces, we can assume there aren't any hydrogen bonds present.
Ionic bonds can't be present either because geckos wouldn't stick to electrically neutral surfaces, as these bonds require charged molecules.
Answer:
C
Explanation:
The Periodic Table organizes the elements according to their properties. One atom of each element is made up of protons, neutrons, and electrons. The number of electrons determines how an element reacts. The number of protons gives the element its identity.
