The shape of a DNA molecule is most like a set of railroad tracks. a diamond ring. a twisted rope ladder. a gold necklace. the letter X.

Astudent drew the following flowchart to show the movement of nutrients. soil → roots → plants →? where does nitrogen go next? a. directly into nearby animals as nutrition b. directly into aquifers through condensation c. directly into the air through evaporation d. directly into nearby plants during fixation

As a result of wildfires, in grasslands. a) tree growth increases b) grass growth increases c) soil quality decreases d) invertebrate variety decreases

In general, characteristics that an organism survive and reproduce become more common over time. what mechanism of evolution causes this?