Which statement is true about the two stars labeled in this diagram?

Hemoglobin is a proton that carries oxygen around the body what is hemoglobin made from

Pulmonary arteries carry highly oxygenated blood. true or false?

The serengeti plains are part of the african savanna ecosystem and are home to a variety of different species of plants and animals. the serengeti plains experience a seven-month period of seasonal drought each year, during which the ecosystem receives only four inches of rain and the availability of some resources becomes very scarce. which type of limiting factors does the seasonal drought in the serengeti plains affect?