Bromothymol blue is an indicator dye that turns yellow in presence of an acid. It remains blue if the pH of the given solution is greater than 7.6 and yellow when the pH is less than 6. The yellow coloration is due to the formation of carbonic acid in the from the carbon dioxide present in the solution.
When aquatic plants are added to two test tubes containing bromothymol blue, stoppered and kept in dark for two days, no color change is observed. It is because the carbon dioxide present is utilized in the process of photosynthesis by plants. If the experiment is conducted in presence if the light, the color of bromothymol blue would be yellow due to the presence of carbon dioxide.
Answer:
When granite is subjected to intense heat and pressure, it changes into a metamorphic rock called gneiss. Slate is another common metamorphic rock that forms from shale. Limestone, a sedimentary rock, will change into the metamorphic rock marble if the right conditions are met.
B. Increased fitness of large-beaked birds, leading to natural selection
Cells do not get larger to show that a baby has grown. Instead, they multiply through cell division.
<h3>What is growth?</h3>
Growth is an irreversible increase in the size and or weight of organisms.
The growth of living organisms is caused by the division of vegetative cells in their body.
Cell growth does occur for cells but this happens in preparation for cell division.
When the number of vegetative cells increases through cell division, an organism begins to increase in size accordingly.
More on growth can be found here: brainly.com/question/8985837
