A cross between a white rooster and a black hen results in 100% gray offspring. When two of the gray offspring are mated, the probable phenotypic ratio seen in their offspring would be___ a) 75% gray, 25% white
b) 25% black, 50% gray, 25% white
c) 75% black, 25% white
d) 100% gray

The bacteria inside a tube worm would be analogous to what organism in the ocean ecosystem near the waters surface? a. photosynthetic algae b. shrimp c. clown fish d. parasitic lamprey

Which of the following observation darwin shape his concept of descent with modification? a) species diversity declines farther from the equator. b) fewer species live on islands than on the nearest continents. c) birds live on islands located farther from the mainland than the bird's maximum nonstop flight distance. d) south american temperate plants are more similar to the tropical plants of south america than to the temperate plants of europe. e) earthquakes reshape life by causing mass extinctions.

Explain the causes and effect of damage to the genetic code.