Which of the following best describes a noncontact force?
a. a force that is able to act at a distance
b. a force that must be physically touching the object it acts on
c. a force that always pulls objects backward
d. a force that always pushes objects forward

Explain how paleontologists use trilobite fossils as index fossils for various geologic time periods.

What is the genotype of the male circled in pink? ο χου lo xay xaya done answer was xay

Embryonic stem cells are cells derived from an embryo. these cells can be used to create new tissues for patients suffering from certain illnesses and disorders. which statement best summarizes why the use of embryonic stem cells could be seen as unethical? a. some people consider embryos to possess rights equal to those of fully developed human beings. b. extracting stem cells from embryos is a very energy-intensive process, which consumes resources that could be used elsewhere. c. embryos are difficult to obtain, so the monetary cost of using them for research outweighs their benefit. d. the process of extracting stem cells from embryos generates biohazardous waste that cannot be safely disposed of.