A pure line of plants of genotype a/a; b/b; c/c; d/d; e/e(all recessive to wild type) was crossed to a wild type. One F1individual expressed the recessive alleles dand e.

Thisindividual arose most likely from:

A) a deletion in the quadruple homozygous recessive parent.

B) a deletion in the wild-type parent.

C) a gene mutation in the wild-type parent.

D) position effect variegation in the F1.

E) a reversion in the quadruple homozygous recessive parent.

Refer to this portion of a dichotomous key for fish identification to answer the question. 1. (a) has a single dorsal fin ® 5 (b) has a double dorsal fin ® 2 2. (a) one fin is spiny, the other is smooth ® 3 (b) one fin is not spiny or smooth ® 4 5. (a) has small fin on back near tail ® 6 (b) has no fin on back near tail ® 7 6. (a) has barbs near the mouth ® catfish (b) does not have barbs near the mouth ® 10 7. (a) tail is asymmetrical ® 8 (b) tail is symmetrical ® 9 10. (a) scales are small ® trout (b) scales are large ® whitefish what is the next step to complete to identify a fish that has a single dorsal fin, no fin on the back near the tail, and no barbs near the mouth? step 2 step 5 step 7 step 10

Nkentucky, intoxicating beverages (beer, whiskey, wine, etc.) are involved to some extent in approximately % of collisions fatal to pedestrians.

What do transitional fossils best support?