Which statement represent an abiotic environmental factor in an ecosystem?
*the flower bud every spring .
*the fish swim up the river to reproduce.
*the fox eats meats in the meadow.
the lake bottom is lined with rocks,

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.

Determine the wavelength of the light absorbed when an electron in a hydrogen atom makes a transition from an orbital in the n=3 level to an orbital in the n=7 level.

What is the ima of the 1 st class lever in the graphic given? 2 3 0.5