This organelle is found in plant cells, contains a green pigment, and is the site of photosynthesis. this organelle is the
a) leucoplast.
b) chloroplast.
c) mitochondrion.
d) golgi apparatus.

20 points asap! question 1 - in your own words, explain the scientific evidence that supports the plate tectonic theory. question 2 - in your own words, explain why the geological structures in florida are different from the geological structures in colorado.

Describe the primary and secondary immune response in terms of speed and number of antibodies produced?

How is ribosomal rna useful as a molecular clock? a. a large portion of the dna ring is not vital to structure or function, allowing it to accumulate neutral mutations. b. its rate of mutation increases over time as organisms continue to evolve and differentiate from each other. c. a slow mutation rate makes it useful for determining evolutionary relationships between ancient species. d. it is only found in select organisms, making it easier to compare relationships between species that have it.