What is the contribution made to the development of the microscope by robert hooke?
1 first to document careful observations of different cell types
2 identifying the first cell
3 used mathematics to improve the focus of the lens
4 created the first microscope
5 discovered the electron microscope
6 built microscopes capable of magnification of up to 1250 x using regular light

8) animals respond in various ways to stimuli detected through their senses. some of these responses are stimulated by the presence of danger. which of these animal responses is the best example of a response to an immediate threat? a) a rooster crows every morning at the first sign of light. b) as something approaches an octopus, it shoots a cloud of ink. c) from late fall until spring, bears hibernate to preserve energy. d) a dog is getting hot in the sunlight, so he moves to a shaded area.