Which sound would most likely have the lowest pitch?

a bird chirping

a vacuum-cleaner running

a lawn mower running

a dog barking

If rainfall on sand dunes increases, then the erosion rate of the sand dunes will increase Why is this statement a hypothesis rather than a theory?

A scientist proposes that a certain species of bacteria has an unusually high rate of evolutionary change, allowing them to develop new adaptations relatively quickly.

Hich term best describes an organism that can contain up to five levels of organization to carry out life functions? multicellular unicellular abiotic biotic

Using an electron microscope, a scientist identified these cell structures in an unknown organism: mitochondrion, nucleus, cell wall, and chloroplast. What kind of organism did the scientist find?

The experimental results could be made more valid by ... 1) increasing the number of students. 2) using a plastic clothespin. 3) using safety precautions. 4) making a bar graph of the data.

During cellular respiration, which of the following processes take place the cytoplasmn

Which term describes the energy that is stored due to the height of an object from the ground?

1. What is the equation for the equilibrium constant, Keq, for the following general reaction: aA + bB → cC + dD Define each term in the equation. 2.

Antibiotics are not useful for treating the common cold because

What are the six components of soil