Answer:
I think the answer is D ... but I am having a second thought I think it is B
Answer:
1. Precambrian rocks are very old.
2. They have very few fossils.
medical waste is most often collected in biohazard bags or containers and incinerated. The heat kills bacteria and other pathogens that would re-infect surfaces, and workers.
The correct choice is D.
A karyotype is the layout of chromosomes, in size order from largest to smallest. These chromosomes are ALWAYS in pairs, meaning that it would be easy to notice which of the 23 chromosome pairs have 3 chromosomes instead of the usual pair.
