Answer:
The DNA testing process is comprised of four main steps, including extraction, quantitation, amplification, and capillary electrophoresis.
Explanation:
1. Separate white and red blood cells with a centrifuge.
2. Extract DNA nuclei from the white blood cells. ...
3. Cut DNA strand into fragments using a restriction enzyme.
4. Place fragments into one end of a bed of agarose gel with electrodes in it. 5. Use an electric current to sort the DNA segments by length.
Answer:
Both C and E are reasonable answers.
Explanation:
Homeostasis describes the body's ability to maintain a stable equilibirum. In other words, if the body experiences a stress, it will generate a response that works to counteract that stress and restore itself to how it was prior to the stress.
A. This describes a cause and effect (BP down --> venous return down). It does not describe an active physiological response to counteract the BP drop such as an increase in heart rate. Not homeostasis.
B. Again, a cause and effect is described. Blood vessel walls becoming thinner is not a response to counteract increased BP. Not homeostasis.
C. Here a response to a stress is described. Men are drinking more water. The body responds by getting rid of that water, restoring the body to its former state. This describes homeostasis.
D. This sounds like homeostasis, but it's actually the opposite of what happens. Dilation of peripheral blood vessels is a way for the body to get rid of heat. This is the opposite of what you would want if the body got colder - it would make the stress worse, which is the opposite of homeostasis. In actuality the response to cold temperature is constriction of blood vessels to preserve heat.
E. This deescribes homeostasis. The stress is increased glucose. The body's response to manage it is to release insulin, which helps remove the glucose from circulation.
Answer:
They provide the body with energy.
Explanation:
Answer:
- Mars-sized planetesimal collides with Earth
- The molten material is ejected from Earth
- Material accretes to form the Moon
- The moon begins rotating and revolving around Earth
Explanation:
This is how it is believed that the moon was formed. During the formation of the solar system, rocks, ice, and gases came together in a collision, due to their own gravity, forming the rock and gas planets that we see today. During this bombardment, some material became ejected the earth to form the moon. The moon revolves around the earth because it is within the pull of the earths gravitational field.
They were legally bound to the land by contract and debt. The land owners paid for the serfs to come over from a different country. The serfs then were legally bound to the land until their debt was paid off.
Hope this helps! xx
