*Question*
If sharks have tails, then what has a tail? Answer choices: - squids - Bats - tomatoes - sharks - trout - humans - rocks - Mammal
**Answer**
sharks

*Question*
If tight squeezing ccurs when the muscular walls of blood vessels contract, then what occurs when the muscular walls of blood vessels contract? Answer choices: - Dehydration - rapid expansion - smooth skin - smoking tobacco - loose bumping - pinched nerves - tight sqeezing - movement
**Answer**
tight sqeezing

*Question*
If secondary growth forms secondary blood vessels, then secondary growth forms secondary? Answer choices: - blood vessels - permineralization - Conifers - color of leaves - oxidation reaction - Most plants - peachleaf willow - shrub beds
**Answer**
blood vessels

*Question*
If chemical messengers control anti-aging, then what controls anti-aging? Answer choices: - A computer - air - chemical messengers - ice - an electric stove - Electrical energy - water - Chemical energy
**Answer**
chemical messengers