After Darwin proposed his ideas about natural selection as a mechanism for evolution, it took time before evolution was generally considered a theory. Why do we now refer to it as a theory?

6. During plant development, one function of the cotyledon of a eudicot is to

The energy pyramid show below represents a valley ecosystem. Which transfer of energy shown below is most likely? Remember, energy transfers from when "something" eats "something" as we discussed in class. From eagles to rabbits.

Explain how the bone patterns in mammalian limbs came about, using the theory of evolution from a common ancestor

What has occurred when a solid forms out of the mixing of two liquids in a chemical reaction?

A population of white moths lives in a forest near a factory. this factory burns coal and pollutes the air with black dust. over time, this dust has settled on the trees in the area, making them darker in color. this could result in 1.

Which sphere does a volcanologist most directly study

Identify the components of seawater

Glycogen belongs in the class of molecules known as

1. The concentration of sugar is higher inside a cell than outside the cell. The concentration of water inside the cell is lower than it is outside. Sugar cannot pass through the cell membrane.

Which describes the variable that is changed to test the prediction? A) dependent B) experimental C) control D) independent