Which genus of single-celled organisms feeds by surrounding its food with cytoplasm and engulfing it? A. Euglena
B. Volvox
C. Amoeba
D. Paramecium

If you touch a hot light bulb and get burned, that is an example of a. radiation b. convection c. conduction

The number of passengers who arrive at the platform of a subway station for the 10 am train is a random variable with a mean of 120 and a variance of 16. find the lower bound of the probability that there will be between 100 and 140 passengers (round off to second decimal place).

The brightest star in the night sky in the northern hemisphere is sirius. its distance from earth is estimated to be 8.7 light years. a light year is the distance light travels in one year. light travels at a speed of 3.00 × 108 m/s. calculate the distance from earth to sirius in miles. (1 mi = 5280 ft) g