A certain species of snail shows variation in its shell coloring, from solid yellow shells to brown, banded shells. Birds are the main predator of this snail. A scientist observed populations of this snail in various habitats. The data table shows the number of snails of each shell color in a grassland environment.
Populations of Snails in a Grassland Environment
Evaluate each of the conclusions. Sort each conclusion according to whether it is supported by the data.
(5 points)
•: Birds eat more brown-shelled snails.
:: The yellow-shelled snails are not well camouflaged.
:: The brown-shelled snails stand out and are eaten more often.
The yellow-shelled snails are surviving and reproducing at a greater rate than the brown-shelled snails.
:: The brown-shelled snails have better food sources in the grassland.
which of these are NOT supported by data or IS supported by data
Supported by data: The brown-shelled snails stand out and are eaten more often.
Not supported by data: Birds eat more brown-shelled snails.
The yellow-shelled snails are surviving and reproducing at a greater rate than the brown-shelled snails.
The brown-shelled snails have better food sources in the grassland.