In a survey of northern mountain ash seedlings in northern Ontario, researchers randomly placed eight 1.0 m by 2.0 m quadrats in a field that measured 100 m by 150 m. Estimate the population density and size if the researchers found 2, 0, 0, 8, 6, 1, 1, and 3 seedlings in the eight quadrats.

Which describes radioactive decay of a substance

45 points how are people today being protected from tsunamis? earthquake data is analyzed to detemrine if a tsunami is likely, and if so, warnings are sent out. areas in tsunami risk zones are no longer heavily populated. radar is used to measure wave heights regularly. meteorologists study the winds to determine if wave heights will be large.

Which is an example of a vestigial structure? a. tail of a monkey b. fin of a fish c. flower of a plant d. tailbone of a human