"watermelon snow" in antarctica is caused by a species of photosynthetic green algae that thrives in subzero temperatures (chlamydomonas nivalis). these algae are also found in high-altitude year-round snowfields. in both locations, uv light levels tend to be high. based on what you learned in this chapter, propose an explanation for why this photosynthetic alga appears reddish-pink.

Sydney drew a flow chart to illustrate the nitrogen cycle.which labels best complete the flow chart? x: producers undergo photosynthesis.y: nitrogen compounds are released into the air.x: nitrogen compounds are released into the air.y: producers undergo photosynthesis.x: free nitrogen is in the atmosphere.y: producers absorb nitrogen compounds through their roots.x: producers absorb nitrogen compounds through their roots.y: free nitrogen is in the atmosphere.

Vessels draining the myocardium of the heart, open primarily ,into which chamber?

Which of the following shows the results that you would get if you tested beef using the four tests in the gizmo