Answer:
By one week after conception, the multiplying cells have divided into outer cells enclosing a mass of inner cells. The inner cells will become the embryo.
Explanation:
By week one, the outer cells will give the trophoblast, which will later become the placenta, while the inner cells will form the embryoblast, which will become the embryo. Then the inner cells will be in one end, and in the other one, there would be the blastocele, which is a space with fluids. This process takes place in the fallopian tube and is part of the segmentation process.
Explanation:
Enzymes are protein structures which speed up the rate of chemial reaction in human systems. They can be found in digestive system, liver etc. They are composed of active sites which are specific to a particular substrate.
Enzymes can only work in certain conditions. These conditions include; pH, temperature etc. Most enzymes in the human body work optimally at around 37°C, which means that at lower or higher temperature they might work sluggishly.
Likewise at certain pH range designed for the part of the body, they'll also work optimally. Example, enzymes in the intestines work best at 7.5 pH while enzymes in the stomach work best at pH 2 (pH of the stomach is much more acidic).
If these conditions in the environment are too high or too low, the enzyme loses its initial shape and hence, alters the shape of the active site.Consequently, the "specific" substrates cannot bind to it because the enzyme has become denatured.
Chemical weathering changes the composition of rocks, often transforming them when water interacts with minerals to create various chemical reactions. Chemical weathering is a gradual and ongoing process as the mineralogy of the rock adjusts to the near surface environment.
The rock that fits the following observations is Gabbro.
<span>- the rock has intergrown crystals from 2 to 3 millimeters in diameter </span>
<span>- the minerals in the rock are gray feldspar, green pyroxene, and black amphibole </span>
<span>-there are no visible gas pockets in the rock </span>