Ques and Ans: Streams may start with runoff seeping out of water containing what?
Options:
- (A) chemicals
- (B) Nutrients
- (C) Nitrous oxide
- (D) Helium
- (E) Lithium
- (F) Sulfur
- (G) soil
- (H) Sediment
(F)
Explanation for the Ans above: [[Streams may start with runoff or water seeping out of a spring. Sulfur occurs native in the vicinity of volcanoes and hot springs. Streams may start with runoff or water seeping out of a body of water where sulfur occurs.]]

Ques and Ans: _ have the amazing capacity to regrow segments.
Options:
- (A) ferns
- (B) arachnids
- (C) roots
- (D) earthworms
- (E) anthropods
- (F) crustacean
- (G) loose soil
- (H) root growth
(D)
Explanation for the Ans above: [[Annelids have the amazing capacity to regrow segments that break off. Earthworms Earthworms are in the phylum Annelids. Earthworms have the amazing capacity to regrow segments that break off.]]

Ques and Ans: How can cells of the tobacco mosaic be seen?
Options:
- (A) refraction of light
- (B) an area swollen with pus
- (C) by indirect light
- (D) death and devastation
- (E) bending light rays
- (F) electron microscope
- (G) deadly and devastating
- (H) Veins and arteries.
(F)
Explanation for the Ans above:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
[[Viruses are so small that they can be seen only with an electron microscope. Viruses include the Tobacco Mosaic Virus. Tobacco Mosaic is so small that it can only be seen with an electron microscope.]]