Why do some leaves turn yellow or orange in the fall?

A) to attract beneficial insects

B) because the chlorophyll pigment has broken down

D) because the carotenoid pigment has increased

Where does most of the metabolic activity in a cell occur? in the DNA in the cytoplasm in the cell wall in the nucleus In multicell organisms, which is the most complex level of cellular organization? tissues systems organs cells

What is the function of NADPH? NADPH, or nicotinamide.

Why is it important for your body to return to its balanced and steady state

What substances remain in wastewater after effective secondary treatment?

Why is DNA located in our fingerprints?

Think about the following items: a candle flame, a balloon floating in the air, and bubbles blown from a bubble wand. Describe characteristics that could indicate life in these items, and characteristics that show they are not alive.

If a person wanted their child to have 6 fingers on each hand, explain how you think a doctor would be able to accomplish this

Why are you less likely to find fossils in metamorphic rocks?

What is the ultimate energy source for most forms of life on earth?

How is the skeleton similar to the frame of a house? both are made of calcium. both provide shape and support. both allow movement. both separate the structures into compartments.?