Alfred Russel Wallace proposed ideas which prompted Darwin to publish his "Origin of Species". Alfred Wallace himself studied the distribution of species with respect to geographical conditions, and believed that there was some law governing the origin of new species, and it was not according to some predetermined pattern. His paper, "On the Law which has Regulated the Introduction of New Species" was published in 1855.
Alfred Russel Wallace, a biologist, naturalist and anthropologist who studied life in the tropics of Indonesia came up with the same idea of natural selection as Charles Darwin and prompted Darwin to publish his Origin of Specie sooner rather than later. He also studied the geographic distribution of species and as as well he was a social activist who criticized capitalism and warned of damage to the environment from man's economic activities.
Prokaryotic: before nucleus, no membrane bound organelles, and single celled microscopic organisms eukaryotic: true nucleus, has membrane bound organelles, and multi cellular or unicellular organisms
therefore it would be letter <span>B. cell membrane and cytoplasm</span>
The right ventricle pumps the oxygen-poor blood to the lungs through the pulmonary valve. The left atrium receives oxygen-rich blood from the lungs and pumps it to the left ventricle through the mitral valve. The left ventricle pumps the oxygen-rich blood through the aortic valve out to the rest of the body.
