When a brown mink and silver-blue mink were crossed, all of the offspring produced were brown. When these offspring were mated, they produced 60 brown minks and 20 silver-blue minks. Of the 60 brown minks, the number that are heterozygous should be closest to

How do tides affect the organisms living in intertidal zones? a. no organisms live in intertidal zones due to the tumultuous environment. b. the mechanical forces of the waves keeps the organisms clean. c. only plants live in intertidal zones because the animals float away with the waves and never return. d. the mechanical forces of the waves can dislodge the organisms from their habitat.

If you have a difficult time knowing where your hand is without looking at it you may be having a problem with your what ?

Why do leaves change color in the fall? green pigments break down and no longer mask the color of chlorophyll. chlorophyll breaks down and no longer masks the colors of other pigments. red- and yellow-colored pigments grow and mask green-colored chlorophyll. green-colored chlorophyll breaks down and turns red and yellow.