Which statement best describes a link between the nervous and excretory systems?
O A. The kidneys produce hormones that travel to the brain through the
nerves.
B. The excretory system removes wastes from nerve cells.
O C. Sensory neurons detect problems in blood that are corrected by
the kidneys.
O D. Nerves are the connective tissue in the kidneys.

What have we learned from fossil evidence about evolution? a) it is an abrupt change. b)the process is observable. c) it takes place during one lifetime only. d)the most complex traits are always selected.

Deer cave cannot support photosynthesis is as not enough sunlight is present. in spite of this, it still has a complex food chain. what is the energy foundation of this food chain?

Which of the following types of stars is most likely to end up as a supernova? in graph a, the curve peaks at 800 nm, in the red section of the visible light spectrum. in graph b, the curve peaks at 550 nm, in the green section of the visible light spectrum. in graph c, the curve peaks at 450 nm, in the blue section of the visible light spectrum. in graph d, the curve peaks at 300 nm, in the violet section of the visible light spectrum. a b c d