[Answer] In "Eats, Shoots and Leaves, punctuation marks are compared to what highway safety device, because they keep words from banging together?

Step 1 : Introduction to the question "In \"Eats, Shoots and Leaves,\u201d punctuation marks are compared to what highway safety device, because they keep words from banging together?"

...Hint :Go, Stop, Slow

[Answer] What do Japanese call their colorful autumn leaves?

Step 1 : Introduction to the question "What do Japanese call their colorful autumn leaves?"

...When autumn arrives in Japan, the colorful autumn leaves, or 'koyo,' brighten the countryside. The brilliant colors of red, orange, gold and yellow draw as many visitors as the world-renowned cherry blossoms do in the spring. Taking time to view the autumn leaves is a popular outing in Japan today, just as it has been for centuries. Famous spots that offer breathtaking views of the fall foliage dot the country, especially in the mountainous regions, in parks, and around temples. Weather permitting, viewing is possible from September through early November. Source: jnto.org.au

[Answer] 4. This metal is the fifth most abundant element in the earth's crust, and is an essential constituent of leaves, shells, bone, and teeth.

Step 1 : Introduction to the question "4. This metal is the fifth most abundant element in the earth's crust, and is an essential constituent of leaves, shells, bone, and teeth."

...1. iodine 2. calcium 3. phosphorous 4. zinc Calcium is perhaps best known for its numerous compounds. Common chalk is a compound containing calcium.

[Answer] 9. Adam and Eve wore these leaves after they realised they were naked.

Step 1 : Introduction to the question "9. Adam and Eve wore these leaves after they realised they were naked."

...1. Elm 2. Fig 3. Apple 4. Date These leaves have also been used in art, on statues, to cover the male parts.

[Ans] What color are the leaves of birch, tulip poplar, redbud and hickory trees in autumn?

Step 1 : Introduction to the question "What color are the leaves of birch, tulip poplar, redbud and hickory trees in autumn?"

When the leaves of trees such as redbuds, birches, tulip poplars and hickory always turn yellow in the fall, never red. There is apparently no biological significance or function to the shift in color. There are a few trees, such as dogwoods, black gums, sugar maples and sourwoods that usually turn red but they may, on occasion, be yellow as well. The most intense color shifts in fall foliage take place in areas such as New England in the northeastern U.S. Source: NCNatural.com