Living diatoms contain brownish plastids. If global warming causes blooms of diatoms in the surface waters of Earth's oceans, how might this be harmful to the animals that build coral reefs?
A) The coral animals, which capture planktonic organisms, may be outcompeted by the diatoms.
B) The coral animals' endosymbiotic dinoflagellates may get "shaded out" by the diatoms.
C) The coral animals may die from overeating the plentiful diatoms with their cases of silica.
D) The diatoms' photosynthetic output may over-oxygenate the water.
B
You might also like to view...
B cells undergo ____ , where a specific cell will divide in response to its associated antibody recognizing an antigen
Fill in the blank with the appropriate word.
An acidic solution:
A. will have a pH greater than 7. B. will have a pOH less than 7. C. will have a very high concentration of hydroxyl (OH-) ions. D. will have a H3O+ concentration higher than its OH- concentration. E. will have a H3O+ concentration lower than its OH- concentration.
In the internal leaf structure shown above, the item labeled "3" is
a. a vascular bundle. b. spongy mesophyll. c. epidermis. d. a stoma. e. palisade mesophyll.
Which of the following statements about miRNAs is false?
(a) One miRNA can regulate the expression of many genes. (b) miRNAs are transcribed in the nucleus from genomic DNA. (c) miRNAs are produced from rRNAs. (d) miRNAs are made by RNA polymerase.