单词:free-living organism
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Passage 17 Living Things React You and all organisms live in an environment. An environment is made up of everything that surrounds an organism. It can include the air, the water, the soil, and even other organism. An organism responds to changes in
You and all organisms live in an environment. An environment is made up of everything that surrounds an organism. It can include the air, the water, the soil, and even other organisms. An organism responds to changes in its environment. When an organ
LESSoN TWENTY-FIVE TEXT A American Men Dont Cry American men dont cry because it is considered not characteristic of men to do so. only women cry. Cry is a weakness characteristic of the female, and n
Pre-Listening Vocabulary cell: a single functional unit of an organism reproduce: to make another living thing paternity: the state of being ones natural parent (esp. father) forensic: scientific evidence related to a criminal investigation Humans Sh
This is Scientific American's 60-Second Science, Im Steve Mirsky. Got a minute? Biologists often attempt to construct a genealogy that shows the relationships of all life on earth. One well-accepted effort compares the nucleic acid sequences that cod
This is Scientific American's 60-Second Science. I'm Steve Mirsky . Got a minute ? February 12th is the 200th birthday of Charles Darwin and Abraham Lincoln. But theyre linked by something else, too. Before Darwin, natural philosophers held to a poin