True or false preferring to drink alone is not a factor that contributes to drug addiction

Which of the following is true regarding white blood cells or leukocytes? A. Leukocytes are smaller than red blood cells. B. Leukocytes contain hemoglobin. C. Leukocytes defend the body against pathogens. D. The most common leukocyte is the monocyte.

Jon likes hiking. He observes that whenever he hikes up a hill, he breathes heavier than when he is on flat ground. Which two statements explain why this happens? Sensors in the brain detect a lack of oxygen.

Which aspects of climate are most important to forest ecosystems?

The sun is a medium-size star with average luminosity and temperature. Which of the following describes the relationship between two stars if their apparent magnitude is the same? A. The luminosities must be the same. B.

Do all cells complete the cell cycle at the same amount of time

A monk crossbred? plants, which can have purple or white? flowers, and obtained 754754 plants with white flowers and 290290 plants with purple flowers. find the empirical probability that a plant had each type of flower

What gametes might each plant produce? Purple flowered

Which activity seems to be the most important health habit in old age?

Most states have deer hunting seasons designed to reduce the size of the deer herd before it gets so large that deer starve to death during winters with little food.

Abdominal aorta is located in