This is a muscular tube through which food passes, aided by peristaltic contractions, from the pharynx to the stomach.

The relatively slow brain waves of a relaxed, awake state are called:

All of the following statements are part of cell theory except: A. All organisms are made up of one or more cells. B. All cells carry on life activities. C. All cells are parts of tissues. D. All new cells come from pre-existing cells.

Many natural ecosystems change through secondary succession. Which of the following describes an ecosystem where secondary succession will most likely occur? A. a coastline newly formed from erupted lava B.

Again, frederick compares the treatment of slaves to the treatment of horses. how?

Which lists the correct order of evolutionary history? a. crabs, jellyfish, reptiles b. mammals, amphibians, crabs c. vertebrate fish, crabs, mammals d. jellyfish, reptiles, mammals

Why is DDT so hazardous? A:it does not decompose fast B:it killed almost everything C: it traveled to many continents through water

What is kind of cell does the plants has

Which structures are found in fungi? Check all that apply. cell walls hyphae cilia leaves nuclei spores

Patsy has always been "larger than life." She tends to blow even small annoyances out of proportion. For example, when the store didn't have the dress she wanted for prom, it was the "end of the world.

What is the advantage of having a folded membrane surrounding the cell, within the cytoplasm, or within an organelle?