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Biology, 22.06.2019 15:00
Which of the following must be true for a fossil organism to be useful as an index fossil? a. the fossil organism must be widespread geographically. b. the fossil organism must be abundant. c. the fossil organism must be limited to a short span of geologic time. d. all of the above.
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Biology, 22.06.2019 19:30
Why do the circulatory systems of land vertebrates have separate circuits to the lungs and to the rest of the body?
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Biology, 22.06.2019 21:00
Some steps in cell division are shown below: 1. chromosomes condense and pair up 2. segments of dna of sister chromatids twist and cross 3. exchange of dna occurs between chromosomes 4. four daughter cells are created that are haploid which of the following steps is least likely to occur during meiosis 1?
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Biology, 23.06.2019 06:30
This is part two of my most recent question with 3 pictures. me get my grade up from 62.3 with this.
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Which is the correct breakdown and translation of the medical term chondroplasty?...
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