When the eye is exposed to bright light, are impulses sent to the brain or spinal cord? and is this reflex involuntary response or voluntary? I thought that if the eye is exposed to bright light, the pupil changes without our consciousness so might be involuntary, and maybe is sent to the spinal cord (but I doubt...)... is that true? Thanks

There are fewer than 100 naturally occurring elements in the universe, but there are millions of different unified substances. explain how this can be true.

How do the evolutionary chart and the video support the claim that all living things are made up of cells?

2. which of the following statements does not accurately describe stem cells? a. embryonic stem cells make up the inner cell mass of a blastocyst. b. with more research, stem cells may be used to repair or replace damaged cells. c. the use of stem cells is without any objections since it can be used in therapies to humans. d. adult stem cells are multipotent and can differentiate into many types of cells.