Which type of chromosomal mutation causes this form of down syndrome?

Researchers want to use edna to look for an invasive species in the water which of the steps would be likely do last

Which of the following are the functions of the integumentary system? yadda-yadda, the 1st answer is the brainliest. : )

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.