A group of researchers are monitoring the health of a salt marsh. They measure high levels of nitrates and phosphates in the sediment of the marsh
but not in the water samples. In this instance, which ecological service is the
marsh providing?

A. coastal land
B. Aquatic habitat
C. Flood protection
D. Water purification

16. which of the following accurately describes a step within transcription? a. dna polymerase uses one strand of rna as a template to put together nucleotides. b. the dna strand is used as a template for which a complementary rna strand can be produced. c. the rna strand forms a template by which dna can be built. d. the rna strand is produced within the cytoplasm.

What mistake did john needham make that caused him to conclude that spontaneous generation for microorganisms occurred? a. he re-contaminated his boiled broth solutions. b. he destroyed the vital force in the solutions. c. he did not boil his broth solutions, only warmed them. d. he failed to seal his flasks of boiled broth. e. he allowed his assistant to conduct the experiment which he did not monitor closely.

The most famous fossil called archaeopteryx is which of the following? a dinosaur a fern a fish a bird