Which of the following is a main characteristic that scientists focus on when determining which kingdom an organism belongs to?
a. cell wall
b. body type
c. nutrition
d. all of the above

Contrast how pollination is different among gymnosperms and angiosperms.

What two factors does carrying capacity compare? population size and resource use population growth and resource availability resource use and time population size and time

1. you serve a volleyball with a mass of 2.1 kg. the ball leaves your hand with a speed of 30 m/s. the ball has energy. calculate it. 2. a baby carriage is sitting at the top of a hill that is 21 m high. the carriage with the baby weighs 12 n. the carriage has energy. calculate it. 3. a car is traveling with a velocity of 40 m/s and has a mass of 1120 kg. the car has . calculate it.