A. they are drugs or hormones used to prevent osteoporosis
Answer:
bcz lichens grow only there have no pollution and new ecosystem have no pollution in this way lichen are necessary after disturbances bcz after pollution have created by human
This is because some of the trisomies (one extra chromosome, three instead of two) are fatal, births cannot survive.
Theoretically, trisomies can occur with any chromosome, but often result in miscarriage.
The types of autosomal trisomy that survive to birth in humans are:
Trisomy 8 or Warkany syndrome 2
Trisomy 9
Trisomy 13 or Patau syndrome
Trisomy 18 or Edwards syndrom
Trisomy 21 or Down syndrome.
Telophase happens. hope this helps
