Medium acidic. in the first tube and
econd.
A green plant such as pelargonium supplied with
a strictly mineral liquid is exposed to an air draft
that traverses a solution of sodium bicarbonate
(NaHCO3) labelled by radioactive carbon C. Few
drops of phenolphthalein are added.
Phenolphthalein becomes dark pink in a basic
medium. The chemical reaction liberating carbon
dioxide is represented below:
A
CO.
how can you explain the change in color of phenolphthalein into dark pink?

Identify the missing parts of the carbon cycle

20 point pls brianliest 1. what does a red shift mean? blue shift? 2. describe the big bang theory. according to this theory, how old is the universe? 3. scientists believe the universe is expanding. what is the evidence that supports this? 4. describe a nebula. 5. describe the 3 types of galaxies. what is a barred spiral galaxy? 6. what is a light year? how far is alpha centauri from earth? 7. describe the universal law of gravitation. be sure to include gravitational force between two objects. 8. describe the planets’ orbits around the sun. 9. what is the asteroid belt? where is it located? 10. describe rotation and revolution of earth. what determines an earth day and year? 11. how do galaxies exist? 12. compare and contrast the inner and outer planets. 13. what causes the seasons?

Which organelle plays a role in intracellular digestion?