The 30 trillion or so cells in your body require a continuous supply of oxygen and nutrients and an unending removal of waste materials. the blood carries these materials in the body's circulation within a series of closed tubes, called

Which of the following temperatures scales is not regularly used in science

How do plants obtain nitrogen? A. They remove it from the air. B. They absorb it through their roots. C. They fix it in their leaves. D. They produce it in their stems.

Meristem is made of differentiated cells true or false

How many cells are in a single drop of blood? explain your answer.

The most commonly used fuel for nuclear reactors is: 1. xenon 2. uranium 3. strontium 4. krypton

Which of the following statements does not describe a problem with modern landfills? A. Materials buried in landfills decompose in three years. B. Chemicals leaking out of the waste stored there may pollute wells or groundwater supplies. C.

Describe the basic functions of living organisms

In 1783 Antoine Lavoisier showed that the heat produced by respiration was comparable to the heat produced when charcoal was burned. This expeiment shows the similarity between respiration and A) boiling B) combustion C) ignition D) melting

What are two ways that organisms are connected to the nonliving enviroment

The nurse is assessing a child's weight and height during a clinic visit prior to starting school. the nurse plots the child's weight on the growth chart and notes that the child's weight is in the 95th percentile for the child's height.