Population i stars are found in what area of the milky way?

a. spiral arms

b. central bulge

c. halo

d. globular clusters

How does blood flow through the heart and lungs during fetal circulation?

How do scientists communicate the proven results of their experiments?

To derive energy from food, you must eat foods that contain A. water. B. carbohydrates, proteins, and fats. C. vitamins and minerals. D. fiber.

Which scientist formed his ideas about living things by performing observations with out using a microscope? A. Hooke B. malpighi C. van leeuwenhoek D. vesalius

Three characteristics of plants

Which of the following describes a relationship of commensalism? A. A tapeworm latches itself in the intestines of a rat, feeding off all the nutrients eaten by the rat. B. Oxpecker Birds eat parasitic tricks off the backs of zebras C.

Which of these statements about osmosis and active transport is NOT correct? A) Both endocytosis and active transport require cell energy. B) Osmosis requires cell energy while active transport does not.

Which of the following two cycles are the most closely related in their role in sustaining life?

2. Which type of joint has the most amount of movement?

You are testing 3 new herbicides, A, B, and C, to control itch grass and to compare the effectiveness of the herbicides with a currently used herbicide, Round-Up, and the treatment with just water.