The centromere is <span>the region that joins the two sister chromatids, or each half of the chromosome. In prophase of mitosis, specialized regions on </span>centromeres<span> called kinetochores attach chromosomes to spindle fibers.</span>
Forest biome: It gives us medicinal plants, woods for commercial purpose. Forests provides us rubber and fibers that is very important for the industries for making various products. They also contribute to perform ecological functions such as carbon storage, nutrient cycling, water and air purification. It also provides habitat to the wildlife.
Freshwater biome: We use fresh water for drinking water, irrigation, sanitation systems, and in industrial factories. Water used from groundwater, rivers and lakes is regained by rain and snowfall.
Marine biome: It serves huge amount of oxygen into the environment and absorbs the atmospheric carbon dioxide.
As a result of the activity of human there is a significant decrease in the number of trees. The products now used are synthetically made which were made up of natural fibers previously. The water source such as rivers, lakes, and ponds are polluted due to which many water borne diseases are increasing day by day. The accumulation of waste which are found in marine biome are reducing the number of flora present inside marine ecosystem.
Ok, a few things here:
This is an egg drop experiment, so I'm assuming you are testing out different ways of protecting the egg.
The independent variable is what you want to change: This would be the type of protection you have on the egg
The dependent variable is what would be effected by the changes in the independent variable: which would be something like the integrity of the egg after it hits the ground. You'd have to measure that somehow.
There are two types of controlled variables: <em>Internal and External.</em>
Internal variables are within the scope of the experiment and can be controlled, whereas external variables are outside the scope of the experiment and we have no control over them.
Internal:
- Height of the drop
- Type of egg
- Person dropping
- How the egg is dropped
- Surface being dropped on to
External:
- The person designated to drop the egg is sick
- You run out of eggs to drop
- Somebody loses all the planning for the experiment
- The weather forces you to do the experiment inside versus outside
- The wind blows your egg off course, leading to it hitting the ground at an angle
So, the way your teacher "chucks" the eggs off the roof should be a controlled internal variable. The action should be done as consistently as possible to avoid an uncontrolled variable.
Cystic Fibrosis is a genetic disorder passed through a recessive gene. Often this condition is first diagnosed when the patient is a child by using a sweat test. Cystic Fibrosis affects cells that produce mucus, sweat, and digestive juices, causing these fluids to become thick and sticky. This causes a cough, repeated lung infections, the inability to gain weight (developmental issues), and fatty stools. Patients can take a mucus thinner medication which helps temporarily thin the mucus in their airways, allowing them to cough it out of their lungs more easily. Another treatment is using vest therapy. The vibration of the vest against the chest wall helps loosen mucus, creating airflow that will move the mucus away from the airway walls. The patient must then cough periodically during and after the treatment to clear the fluid.
Igneous rock, because it is the cooling of hot magma.
