Supposed a biologist design an experiment to study the effect of water pollution on the reproduction rate f salmon. what is the dependent variables in this experiment

Ultiple Choice Soils are made up of a mineral portion, an organic portion, and air and water. What are the three mineral components of soil? Check all three. clay bits of plant material; dead organisms silt sand

What makes plants the beginning of the food chain? A. Plants store chemical energy as glucose B. Only plants use solar energy in a chemical process to produce food C. All organisms eat plants D. Plants make food for other organisms.

Clearcutting is a controversial practice that is widely applied in forests managed for wood production in many parts of the world.

Scientific concepts can be explained through drawing

A fossil of a fern and other large-leafed plants were found in an area of Alaska. What does this suggest about this area in Alaska?

Find the common radio of the sequence. - 4,8,-16,32,

Grandpa Sam used to tell his grandkids how he first laid eyes on Grandma Sylvia. "When I was courting your granny, I was dazzled by her beautiful, LONG eyelashes. What a looker she was." "Yes, and a handsome man he was too," said Grandma Sylvia.

Jim is categorized as poor. Thus Jim's daily income must be less than how much dollars? Jim must be earning less than dollars per day.

Why does blood pressure decrease as the blood travels from arteriesto arterioles to capillaries?

Kangaroos that nurse their young in a pouch are what type of mammal? monotreme marsupial placental mammal