Isotopes the atomic mass of an element because they have a number of neutrons.
a. disregard, constant
c. increase, lower
b. increase or decrease, different
d. decrease, higher

Jewelweed, a flowering plant, has seed pods that burst open when touched and forcefully eject their seeds. these structures are favorable because they a. can cause genetic changes to occur. b. prevent germination within the seed pod. c. aid in the dispersal of the species. d. attract insects that aid in pollination.

All cells are made of four types of acids, lipids, proteins, and carbohydrates.

Suppose the universe were completely empty except for one object-a solid sphere moving through space of 100 km/s. what sort of path would the object be moving in? explain your answer