Answer the following questions

1. What are two sources of carbon dioxide in air?

2. what are trace gases

3. what are 2 processes that use oxygen?

All living things share common characteristics. They are made up of cells, they respond to change, reproduce, have DNA, and use energy. What is one other common characteristic of living things

How would the variety of organic compounds be different if carbon had seven electrons in its outer most energy level instead of four?

All the iron molecules that are in your body were originally created by

All of the following are examples of the five basic functions of life except A. responding to the environment B. growing and developing C. using energy D. making more than one offspring E. getting rid of waste F. reproducing

What do the proteins embedded in the cell membrane do?

Why is an organisms role important for its community?

Briefly describe what is meant by the semiconservative nature ofDNA replication?

Why do sex-linked traits follow different patterns of inheritance than other traits? Apex

Some animals, like birds, reproduce by fusion of cells. Before a bird hatches, what protects the bird as it develops?

Which best describes the structure of a DNA molecule! A. Two strands of RNA linked together B. Two strands of amino acids linked together O c. A strand of DNA linked to a strand of RNA D. Two strands of DNA linked together