Answer:
iv is the amounts of salt added to water
Explanation:
because it being controlled in the expariment by the scientists.
Answer:
The main pigment responsible for the yellow color of urine and the brown color of feces is called urobilin.
Explanation:
Here's how it works:
1. When red blood cells break down in the body, a molecule called bilirubin is produced. Bilirubin is a yellow pigment.
2. Bilirubin is transported to the liver, where it undergoes further processing.
3. In the liver, bilirubin is conjugated with glucuronic acid, forming a water-soluble compound called bilirubin glucuronide.
4. Bilirubin glucuronide is then secreted into the bile, a digestive fluid produced by the liver.
5. The bile flows into the small intestine, where it aids in the digestion and absorption of fats.
6. In the intestine, bilirubin glucuronide is broken down by bacteria into urobilinogen.
7. Some urobilinogen is reabsorbed into the bloodstream and eventually excreted by the kidneys, giving urine its yellow color.
8. The remaining urobilinogen is further processed by bacteria in the colon, resulting in the formation of urobilin. Urobilin gives feces its brown color.
It's important to note that factors such as hydration levels and certain medications can influence the color of urine. In some cases, a darker yellow color may indicate dehydration, while lighter or clear urine may indicate excessive hydration.
Similarly, changes in diet, certain medications, and underlying health conditions can affect the color of feces. If you notice any significant changes in the color of your urine or feces, it's always a good idea to consult a healthcare professional for further evaluation.
Answer: The environmentalists are concerned about the introduction of genetically engineered trees because their introduction into the environment could have unexpected interactions with the other plants and animals present in the ecosystem.
Other reason can be loss of native species. The native species that is originally present in the environment can be lost due to the introduction of genetically engineered plant species.
b. gravel on the bottom of the aquarium
c. plants growing from the gravel
d. fish swimming in the water
I am pretty sure that the answer is B! I just took the Test and it makes sense because abiotic means not living feature and gravel isn't a living feature! Hope this helps!