Which best describes red blood cells? They are colorless. They protect against disease-carrying microorganisms. They transport oxygen throughout the body. They aid in blood clotting.

Which of these is an example of a chemical change? A. Setting a piece of paper on fire O O B. Melting iron into a liquid C. Dissolving salt in water O O D. Breaking a piece of plastic in half

The stomach, small intestine, and large intestine are all organs. When they work together to process food, they form a functional unit known as - an organ system an organism a tissue a cell

Which is a part of a neuron that sends out messages? answers?

When is a large event such as a major earthquake not a disaster?

What happens to the dirt and matrix from each grid? it is discarded as trash it is burned to avoid contamination of the site it is collected for further analysis it is put back in the grid after the fossils have been removed?

The evolution of populations due to chance isa) genetic drift. b. has more effect in large populations than in small populations. c. gene flow. d. natural selection. e. genetic variation.

When you first get into the swimming pool the water feels rather cool; but after swimming for a while the water feels fine. a friend asks you how the water is and you tell her the "water's great".

What part of the brain is primarily responsible for monitoring blood glucose levels and causing chemical reactions to spur us to eat when glucose levels are low?

Which cell structure is responsible for controlling what enters the cell? select one: a. cytoplasm b. nuclear membrane c. plasma (cell) membrane d. endoplasmic reticulum

All of the following are functions of the peripheral nervous system except it interprets signals from the external environment it sends signals to the internal organs it receives messages from the central nervous system it sends messages directly to