Agroup of students is trying to grow a kelp plant in a tank without any others animals. they use a temperature regulation system to keep the water temperature at about 12°c. they bury the holdfast below the soil that has been enriched with nutrients and place the plant near a window in direct sunlight. however, over a few weeks the kelp plant withers and dies. why did this happen?

Which of the following matches the organisms described with the correct domain? a. archaea--multicellular, eukaryotic organisms that do not have cell walls b. eukarya--single-celled and multicellular organisms, with a defined nucleus and a variety of nutritional sources c. bacteria--unicellular, eukaryotic organisms with cell walls that do not contain peptidoglycan d. bacteria--unicellular, eukaryotic organisms that always lack cell walls

What is a difference between systemic and pulmonary circulation? a. systemic circulation carries oxygenated blood to the lungs and pulmonary circulation carries deoxygenated blood to the body. b. systemic circulation carries deoxygenated blood to the lungs and pulmonary circulation carries oxygenated blood to the body. c. systemic circulation carries deoxygenated blood to the body and pulmonary circulation carries oxygenated blood to the lungs. d. systemic circulation carries oxygenated blood to the body and pulmonary circulation carries deoxygenated blood to the lungs.

Modern sea star larvae resemble some primitive vertebrate larvae. this similarity may suggest that primitive vertebrates