On average, the moon's umbral shadow is
1. too short to produce a total solar eclipse.
2. too bright to produce a total solar
eclipse.
3. too wide to produce a total solar eclipse.
4. too faint to produce a total solar eclipse.
5. too long to produce a total solar eclipse.

What are four key elements of the study of economics?

1. describe the structure and function of the specialized cells you observed in the video. 2. research the types of cells present in the kidney.

One function of the poly-a tail on eukaryotic mrna sequences is to the mrna be transported from the nucleus to the cytoplasm. prokaryotic mrna also has a poly-a tail. choose the best explanation of the prokaryotic poly-a tail. a. prokaryotic poly-a tails are composed of a different molecular structure compared with eukaryotic poly-a tails. b. prokaryotic poly-a tails have the same functions as eukaryotic poly-a tails, because this process is highly conserved throughout different species. c. prokaryotic poly-a tails aren't important, because prokaryotes don't have nuclei. d. prokaryotic poly-a tails have other functions,because prokaryotes don't have nuclei.