Biology, 01.08.2019 04:30 ErikHabdlowich
The half life of c14 is 5730 years. i have a sample that i dug up from a sea cucumber fossil. i expected .00015ppm of c14 in my living sample, but instead i found that there was exactly1/8th of the expected ratio. how old is my specimen
Answers: 2
Biology, 22.06.2019 10:00, Billyr9088
Cladistics is a way of classifying organisms by examining the characteristics of their ancestors and descendants and depicting the relationships in a cladogram. which of the following best describes a challenge in classifying organisms this way? a. there are millions of species on earth, and a cladogram is not a practical means for classifying all of them. b. it is impossible to tell which organisms are most closely related to each other using a cladogram. c. cladograms are detail-oriented and do not provide a useful understanding of evolutionary relationships. d. there is a limited number of ways to organize the information, so most cladograms end up looking very similar.
Answers: 2
Biology, 22.06.2019 13:10, hcoulter15
Which of the following best describes the purpose of the parathyroid hormone? a. it decreases the blood calcium level and decreases blood phosphorus level. b. it decreases the blood calcium level and increases the blood phosphorus level. c. it increases the blood calcium level and increases blood phosphorus level. d. it increases the blood calcium level and decreases blood phosphorus level.
Answers: 2
The half life of c14 is 5730 years. i have a sample that i dug up from a sea cucumber fossil. i expe...
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