Why is earth considered an open system and a closed system?

During close vision, what actions must the eye take to bring an object into focus? relax the ciliary body dilate the pupil contract the ciliary body change the curvature of the cornea

a student pushes a 40-n block across the floor for a distance of 10 m how much work was done to move the block

What are the hydrogen and oxygen atoms held together by

Which conditions would cause an increase in the salinity of ocean water? A. a river flowing into the sea B. high rates of evaporation C. thawing of glaciers D. cold weather

It's easy to understand why multiple bands would be present in the lanes containing DNA that has been cut with restriction enzymes, but why do you think there are several bands present in the lanes containing undigested (uncut) pGLO DNA?

A 45 year-old male who is in good health presents with complaints of pain in his left heel. He states that the first few steps out of bed in the morning are extremely painful. He has no history of trauma. What is the likely etiology of his pain? A.

How can your weight vary but your mass can remain the same?

Which of these is NOT an aquatic reptile group? plesiosaurs pterosaurs ichthyosaurs nothosaurs

How are chemosynthetic bacteria different from photosynthesis bacteria

What comes first herbivores carnivores or producers