Sand , water , and minerals
Boiling point. If you boil water it changes from a liquid to a gas, which is a physical change. The rest are chemical properties because the chemical make up of an object changes.
Answer:
a.
c.
Explanation:
Lesch Nyhan syndrome is characterized by behavioral and neurological abnormalities, and excess uric acid production in the body. It occurs in males, almost exclusively.
Changes (mutations) in the HPRT1 gene causes Lesch Nyhan syndrome and is inherited in a recessive X-linked way. Several symptoms of Lesch Nyhan syndrome are Inflammatory arthritis (gout), involuntary movements, self-injury and kidney stones.
Hence, the correct option are a. and c.
The answer to this would be a SMALL INTESTINE. The small intestine is the major site for the absorption of nutrients. Nutrients include different vitamins and minerals that are extracted from the foods that we eat. How absorption is possible in this site is the presence of e<span>pithelial cells of the villi. Hope this helps.</span>
Darwin lived in a time where natural selection was a strange theory among scientists and researchers. This was especially true when other researcher Lamarck argued that organisms passed on helpful traits to their offspring, that they magically could form a new trait to adapt to their environment and then pass it onto their offspring. For example, if a giraffe was too short to reach food, it would grow a larger neck in its lifetime and then pass that trait onto its offspring. Darwin argued that, through the process of survival of the fittest, that short giraffe would die off and never receive the chance to pass on its shortness to future populations. Thus, taller giraffes would survive— they can reach food, shorter giraffes can’t— and the short genes would disappear. The fact that Darwin was introducing a new theory that nobody was used to at the time was peculiar, so he had few people on his side until long after his observations.
Another problem Darwin had was the lack of technology. To travel, Darwin would have to use boats to reach far away places, and of course, this took time.
The final problem Darwin had was the extra time it took for evolution, a process that can take up to millions of years. Evolution didn’t occur over night— it took time for Darwin to conduct experiments, observe, conduct them again, come to a conclusion, and so on.
Hope this helped a little!
