Algae play a crucial role in the marine ecosystem. choose the appropriate justification for this statement. a) algae are the decomposers present in the marine ecosystem; any damage to them could cause imbalance in the entire marine ecosystem. b) algae are the primary consumers in the marine ecosystem; any damage to the primary consumers can cause imbalance in the entire marine ecosystem. c) algae are the primary producers of food in the marine ecosystem; any damage to the primary producers can cause imbalance in the entire marine ecosystem.

Nucleic acid certain protein cell membranes certain carbohydrates

Which of these is true of the cytoplasm of an unfertilized egg? a. it is an unevenly distributed mixture of mrna, proteins, organelles, and other substances. b. it does not contain substances that are important in directing development. c. these substances are supplied by the sperm. d. it does not contain substances that are important in directing development. e. development is directed solely by the surrounding cells. f. it is a homogeneous mixture of mrna, proteins, organelles, and other substances. g. it does not contain substances that are important in directing development. h. these substances are produced by the dna of the fertilized zygote.

What materials must dams have to produce electricity, and what must occur?