Answer:
The correct answer would be C, abdominal.
Explanation:
This is true because the pelvic cavity is protected by the pelvis, the cranial cavity is protected by the skull, the spinal cavity is protected by the skull as well as the vertebral column, and the thoracic cavity is protected by the rib cage. Leaving the abdomen the only body cavity not being protected by some sort of bone.
I hope this helps! :)
Some of these can easily be eliminated by knowing that both nitrogen 14 and nitrogen 15 are isotopes ( same element, with the same amount of protons, but with different numbers of neutrons) of nitrogen. So if the only difference between nitrogen 14, 15 , and regular nitrogen is the amount of neutrons...how many protons and electrons should both nitrogen 14 and 15 have? After thinking, you should be able to eliminate A, B,and C.
The actual answer is, "A", an ocean trench.
You can find out more about them by researching them up on Google, it's only a few phrases and a hit on the enter key :P
The following statements accurately reflect the beliefs on Earth's early history:
B. Scientists believe the early atmosphere lacked the oxygen necessary to support modern human life.
The following statements are incorrect:
A. Scientists believe that DNA may have existed before RNA - Scientists actually believe the opposite - RNA may have existed before DNA.
C. Scientists believe that microspheres nearly prevented the development of early life.
D. Scientists believe that oxygen was plentiful in the early atmosphere - again, scientists believed the opposite
Answer:
c. Osmosis is the diffusion of water molecules across a selectively permeable membrane.
Explanation:
Osmosis is the passive transport of water molecules from the region of their higher concentration to that of lower concentration through a semi-permeable membrane. Osmosis does not include the movement of solutes. When two solutions with different concentrations of solutes are separated by a semi-permeable membrane, water moves through the membrane from a hypotonic solution to the hypertonic solution until equilibrium is obtained. This process is called osmosis.
