A friend of yours is using the Mark and Recapture technique to study the butterfly population in the area around his school. He first marked and released 50 butterflies. For four weeks, he checked his traps daily, counted the butterflies in the traps, and then released them. He caught a total of 300 butterflies, and 25 of them were marked. He determined that the total population of butterflies is 150. Is he correct? If not, what is the size of the butterfly population he is studying, and what mistake did he make? Prepare a brief answer to send to your friend by e-mail. Show all calculations.

What best describes the dropping height of a ball that bounces back up to a height of 45 cm

Drag each tile to the correct box. the body monitors the levels of oxygen in the blood to regulate breathing. isabel is running in a marathon and is near the finish line. she feels out of breath. how will her nervous system work to generate a reaction? arrange the tiles in chronological order. isabel's breathing rate increases. sensory receptors in the arteries detect low oxygen levels. the brain sends signals through motor neurons. sensory neurons generate an impulse. the central nervous system relays an impulse to certain brain regions.

(me out over the last several centuries, scientists have made the following broad observations while investigating several branches of the life sciences: -the fossil record shows that different types of organisms have existed at different times in earth's history. -many organisms have similar body structures that seem to be adapted to different ways of living in their environment. -organisms of different species often share similarities in stages of embryonic development. -many species share genetic similarities, and almost all organisms use the same basic building blocks to construct proteins. -often, the extent of two species' similarities can be predicted from their geographic closeness to each other. -a great deal of change has been observed among species that have experienced strong selective pressures through many generations. scientists have carefully considered and rigorously tested the observations listed above. when scientists offer a of these observations, they are making 1.) testable explanation, deductive explanation 2.) scientific interference, scientific law