How do they differ from the first pair?
PEA.
What are the parts of the seed? Compare it with the Morning-Glory, Sunflower, and Bean.
How does it differ in its growth from the Bean?
What have all these four seeds in common?
[Illustration: FIG. 7.—Germination of Pea. a, caulicle; b, cotyledons; c, plumule; d, roots.]
[Illustration: FIG. 8.—Germination of Bean.]
What has the Morning-Glory seed that the others have not?
What have the Bean and Pea that the Morning-Glory has not?