About 60% of natural conceptions fail to implant properly. One of the reasons may be the failure of the embryo to generate Trypsin, a chemical which induces a receptive environment in the uterus in order for the fetus to be implanted. The excess or lack of chromosomes of the fertilized egg may also be a factor in implantation failure. A weak immune system of the woman may also be an important factor.
A covalent bond is also called a molecular bond. it’s the chemical bond that involved the sharing of electron pairs between the atoms.
Translocation theories refer to the process that explain water transportation in plants. We found three great theories: capillarity, root pressure and cohesion. Capillarity refers to the property that displays water when encounterd with small tubes, water "sticks and climbs" through the tube. The smaller the diameter the greater the climbing. Root pressure, refers to the effect salts and minerals absorbed in root, along water, exert in the content previously absorbed. That is, the "new generation of nutrients" pushes upward nutrients previously absorbed. Finally, cohesion theory is similar to capillarity. It refers to the property water molecules have to keep in close contact, due to their hydrogen bonds. Water forms a continuum through the plant. Water is losed through evapotranspiration in the leaves, so as water is losed, water from the stem starts to move. In that way water keeps the "continuum" and fills the gap that evaporated water left.
<span>#1) Find one example of convergent evolution among the Caminalcules.
Answer: The best example that I can think of is the wings on a bat. They have elongated fingers that make up most of the wings. They use skin that is stretched between their fingers to create the area that is required to produce lift. The arm bones in the bats and birds are homologous to one another, but their wings are the result of convergent evolution. Birds and bats have aerodynamic bodies which allow them to pass fly through the air efficiently. Also some insects, like dragonflies, have aerodynamic bodies, but bees and beetles don’t.
<span>I hope it helps, Regards. </span></span>