Well, D is definitely correct - t<span>hey both share cultures, especially along the border, because they used to be one country in the past.
I'm not sure about the second answer though, perhaps C (</span><span>They both work together as economic partners.) is correct because they do trade a lot. </span>
Answer:
Water distribution
Explanation:
The human body uses water in all their cells as matter fact the tissues in body and brains need water to regulate the flow of temperature. As energy is needed for breathing and sweating and digestion also hence the water is needed as important component in the body and thus its prope distribution is a must. 95 percent of human body is amd up of water in the from of fluids, without water civilization would not have existed.
Reptile scales are made of alpha and beta keratin and are formed from the epidermis
Answer:
No agriculture can take place in dry lands due to lack of water.
Explanation:
This is the statement that is not true of dry lands. It is true that dry lands are generally not suitable for large-scale agriculture. However, this does not mean that no agriculture can take place in them. People who have lived in dry lands for generations often farm in a small scale. Moreover, they grow crops that are resistant to this lack of water. Finally, some dry lands are significantly productive due to the use of artificial irrigation.
Answer:
b. flat rotation curves in spiral galaxies
Explanation:
Dark matter accounts for majority of the matter in the universe (about 85%). It is considered to be composed of subatomic particles which are yet to be discovered. Dark matter cannot be observed because it does not emit light that can be detected. Only its gravitational effect is visible.
Astronomers when calculated the mass of the visible matter and tried to account for the observed speed of stars in the galaxy, there was a mismatch. To understand what caused this mismatch, astronomers gave name to the invisible matter as the Dark Matter.
The expected velocity of stars should decrease away from the near the center of the galaxy but a constant velocity of stars was observed that is a relatively flat rotation curve was obtained.
Thus, flat rotation curves in spiral galaxies in an evidence of Dark Matter.
