Homework+questions+BH

3.1: 1. what does the cell theory state? A cell is a basic unit of life

2. Why are cells so tiny? the small size of cells is explained by considering the surface area to volume ratio of cells. WHAT IS THE EXPLANATION RELATIVE TO SURFACE AREA

3. how do the light microscope and electron microscopes differ from one another? The maginification produced by a transmission electron microscope is much higher than that of a light microsope.

6.1:

1. a. what are the functions of blood?, and b. what are its two main portions?

A. Blood is the primary transport medium. blood defends the body against invasion by pathogens in several ways Blood has regulatory functions

B. Plasma (iqiud portion of blood) The other portion consist of various salts and organic molecules. they are part of the buffers that help maintain th PH of the blood.

OTHER CHAPTER 6 QUESTIONS

18.1 1. what are the stages of interphase? Stage #1 A cell doubles its organelles and it acumulates the materials needed for DNA synthesis. Stage #2 DNA replication occurs, and a copy is made of all the DNA in the cell. Each chromosone consists of two identical DNA double helix molecules.

2. How does interphase prepare a cell for cell division? interphase helps the cell duplicate it's DNA so that they can pass it on. It gets larger copies it's DNA and then seperates.?????