Electromagnetic waves with a long wavelength occur at a frequency and are energetic.
A.
high; more
B.
low; more
C.
high; less
D.
low; less

In addition to seeds, which of the following characteristics are unique to the seed-producing plants? a) sporopollenin b) lignin present in cell walls c) pollen d) use of air currents as a dispersal agent e) megaphylls

The organelle pictured is found in cells of and is theorized to have once been an independent organism.

How do you know that the plant cells in these two images have different jobs, or functions? a. because all plant cells serve different functions b. because they are two different colors c. because their dna are different d. because their structures are different