Soils vary throughout the world. Climate, elevation, plant growth; these are just some factors that influence weathering and soil formation. The tundra and the desert are alike in some ways; different in others. Both the tundra and the dessert have little available water for plant growth.

Imagine you are collecting soil samples from a desert location and the tundra. What might these soil samples have in common?

A) a very low amount of humus
B) lots of decomposing tree roots
C) very small, fine-textured soil particles
D) a large amount of sand and very little silt or clay

the two answers are a, the population of birds with large beaks will increase on the island, and c, the trait for large beaks will be passed on to future generations through natural selection. the reason for that is because if the birds that have beaks developed for eating small seeds lose all of their food, they will go hungry and eventually starve because they physically cannot eat the large seeds, therefore making the population of large beaked birds higher. also, if the trait of large beaks are dominant on the island over small beaks, then over time the large beaked birds will reproduce more and more, while the smaller beaked birds will reproduce less and less because they can't survive with the food provided. that leads to the trait of small beaks disappearing and the trait of large beaks taking over the island.

it's d - life cycles - apex

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