About 30 years ago my uncle bought a calculator for about $200. it could so simple mathematical calculations and had a limited memory. today. similar calculator costs under $5.why

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.

18. which statement about cancer is true?

All ova contain sex chromosomes corresponding to: x y xx xy