Biology, 05.02.2020 09:47 alexkrol10

Phenol red is a chemical that turns red when carbon dioxide, co2, is absent and yellow when co2 is present. a small, green plant seedling is placed in phenol red in the dark. which one of the following is most likely to occur?

if the solution is yellow to begin with, it will turn red because respiration is occurring.
if the solution is red to begin with, it will remain red because respiration is occurring
if the solution is red to begin with, it will turn yellow because respiration is occurring.
if the solution is yellow to begin with, it will turn red because photosynthesis is occurring.
if the solution is red to begin with, it will turn yellow because photosynthesis is occurring.

Answers: 2

Show answers

Other questions on the subject: Biology

Biology, 21.06.2019 15:00, kell22wolf

Asnail, elodea (aquatic plant), or both were added to the tubes and they were stoppered. tubes were placed under a grow light for 24 hours and the results recorded. the test tubes were then covered for 24 hours to produce a dark environment and the results recorded. which statement best explains the change in test tube d from the light setup to the dark setup.

Answers: 3

continue

Biology, 22.06.2019 03:30, sCoTtYbOy5329

What organelle other than the nucleus houses dna in a eukaryotic cell?

Answers: 1

continue

Biology, 22.06.2019 09:10, kaciebrin211

Hormones are chemical molecules produced by endocrine glands. one such endocrine gland is the thyroid gland, which synthesizes the thyroid hormone, which in turn affects the heart muscles. which two statements describe the probable reason for the function of the hormone? the cells in the heart have specific receptors that allow for the intake of hormones. the heart and the endocrine glands have the exact same types of cells. all cells make the same types of hormones. thyroid hormones show their effect on the heart by means of specialized cells. thyroid cells and cardiac cells have different dna.

Answers: 1

continue

Biology, 22.06.2019 11:10, tiannahwlit

Look at the photo of the leaf, which term best describes this leaf ? a-simple. b-parallel. c-lobed. d-tooth.

Answers: 2

continue

You know the right answer?

Phenol red is a chemical that turns red when carbon dioxide, co2, is absent and yellow when co2 is p...