Which way is water flowing? High to low, or low to high concentration?

What are the main organs of the muscular system

Which pair is NOT related? cells and tissue nucleus and DNA cell wall and plants chloroplast and animals

State one way insect pests in an apple orchard can be controlled without using chemical pesticides

What is combustion? what are the essential conditions required for combustion?

What is in igneous rock?

How are organisms grouped in an ecosystem? a. by their movement b. by how they get their energy c. by how they migrate d. by how they produce

What happens to about 10 percent of the energy represented in each trophic level?

Is a lion is a carnivore?

How does the biological species concept define a species?

What do the skin and urinary system have in common? Both remove filtered wastes and reabsorb blood. Both remove undigested food from the body. Both remove urine from the body. Both remove urea from the body.