Veins have thin and elastic muscular walls. why?

How does the moon's appearance change as the moon revolves around earth

You are recording the amount of heat that water can absorb before a temperature increase. What are you measuring? A.) The concentration of ions in seawater B.) The concentration of dissolved oxygen in seawater C.) The specific heat of seawater D.

2. forms in your outer ear and is meant to protect your ear from dirt and infection

Plant-like protists are considered to be a. chemotrophs b. heterotrophs c. autotrophs d. none of these

Cardiac and muscles are types of involuntary muscles.

Dna stands for what in biology

Coal is used to produce energy. The harmful gases produced by coal are cleaned up by a method which needs a large amount of limestone. Predict and explain the long term effect on the environment of obtaining and using limestone.

True or false two genes may not segregate independently if they are on the same chromosmoe

Blood pressure rises and falls in a pattern corresponding to the phases of the

Immune system cells enter a resting phase after undergoing mitosis. when activated-for example, by an infection-they can reenter the sequence of events in the cell cycle that leads to cell division.