Why are valves present in veins but not in arteries?

How can you determine how much energy a food item contains? A. taste the food B. weigh the food C. look at amount of Calories D. look at what color the food is

Who was the father of taxonomy

A function of white blood cells is to A. carry carbon dioxide B. fight disease C. form blood clots D. carry oxygen

Which two factors come together to create psychological suspense

What kind of charge does an object have if it has gained electrons Neutral -3 Negative Positive

Which of the following types of models is most likely to be used to predict earthquakes? a. idea model b. physical model computer model d. none of the above

What allows members of the same species to have different characteristics

Which of the following does Max represent to Feld in "The First Seven Years"? A. a chance to improve his own life B. a way to realize a dream C. an escape from a life of hard work D. a professional with solid values

Where is pyruvate made in the cell? A. Cell membrane B. Cytoplasm C. Nucleus D. Mitochondrion

Bio Bio bio question A scientific idea that has not been tested is a :