PLEASE HELP 50 POINTS

what is the formula for Iron(ll)fluoride

Jasmine, at 33 months of age, is able to engage in some self-care behaviors but still has trouble with tasks such as putting on socks. a few months later, she accomplishes this same task relatively easily. the change in abilities is most likely due to

Long term exposure to waves can cause sunburns and skin cancer.

Which best describes a gene? a. a sister chromatid b. a chromosome c. a tetrad d. a piece of a chromosome