What is a survivorship curve?

What are genotypes? what are phenotypes?

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

The activity of the modern sample is 1.10 bq . how long does that measurement take?