2. Which substance has a neutral pH?

O rainwater

O groundwater

O milk

O distilled water

How do natural events and human activities affect the environment?

Which two structures make up the muscular system?

In a well-developed soil profile, which horizon is the uppermost layer? The C Horizon The B Horizon The A Horizon The Parent Horizon

which enzyme is responsible for "unzipping" the DNA by breaking the hydrogen bonds between the nucleotides?

What landform develops on coral reefs as a result of wave action

How do some hormones affect only certain cells in the body but not others? A only cells having specific receptors for a hormone can respond to the hormones presence B some cells have the wrong temperature to respond to the hormone C special

If you must exercise outdoors at night, which kind of clothing is best to wear

The quantity of water that can be held by subsurface rock or soil depends on the ___ of the material.

Which of the following does NOT create variation within a population? a. mitosis b. genetic shuffling c. sexual reproduction (meiosis) d. mutations

Plants in the phylum coniferophyta are