types of selection in populations

If there was a great flood and lemurs that had longer tails were better able to climb and live in trees, while the other phenotypes were not able to survive as well, which type of selection would this be?

Selection type: Directional

In a population of spiders that were hunted by sparrows, the large spiders were easy to spot, but moved very quickly; the small spiders were not very easy to spot; the average size spiders were easier to spot than the small ones, but moved more slowly than the large ones, thus making them the most hunted, which type of selection would this be?

Selection type: Disruptive

In a wild leopard population, cubs that are born with low birth weights lose heat more quickly and tend to die, while babies that are too large are not able to deliver through the pelvic bones of the mother leopard. This leads to a high mortality rate for cubs that are born too small or too large

Selection type: Stabilizing

Limpets are a snail species that can often be found on the seashore. They come in 3 variations: dark, light and intermediate. The dark and light colors are easier for sea gulls to spot, and therefore they are more commonly hunted.

Selection type: Stabilizing

A population of arctic hares burrows into the snow for shelter. It is found that the hares on the smaller side are able to burrow between rocks, as well, providing extra protection from predators. Over time, the hare population becomes smaller in size, shifting the normal distribution curve for hare size.

Selection type: directional

Stabilizing selection:

natural selection that favors the average individuals.

Directional Selection:

natural selection that results in a change among the traits of a population in one direction.

Disruptive Selection:

natural selection that results in a change among the traits of a population in two directions; could lead to two new populations.

In a population of wheat, variation in the height of the wheat decreases over time.

selection type: directional

A large valley is flooded and a population of lizards is separated. Over time, they travel in opposite directions to two different places and eventually become so different they can no longer interbreed.

selection type: disruptive

In a population of field mice, there are many variations of brown, ranging from a very light brown to a very dark brown. The population becomes more of a medium- brown over time, as individuals that best blend in to their surroundings are favored.

selection type: stabilizing