*Question*
If sharks have a skeleton made of tough tissue that contains a protein called collagen, then what has skeleton made of tough tissue that contains a protein called collagen? Answer choices: - mammals - rocks - animals - sharks - a fish - cows - humans - plants
**Answer**
sharks

*Question*
If along tail can be used to swim through water, then along tail can be used to do what? Answer choices: - courtship - Electrical energy - gather meat - hide from predators - swim through water - it keeps an organism warm - reproduce - build shelter
**Answer**
swim through water

*Question*
If some viruses have an envelope of fats and proteins, then viral envelopes are sometimes made of fats and what? Answer choices: - cellulose - glucose - Energy. - protein - viral particles - Energy - food - bacteria
**Answer**
protein

*Question*
If excretion is the process of removing feces and excess water from the body, then what is the process of removing feces and excess water from the human body called? Answer choices: - recycling - salivation - waste production - excretion - Exfoliation - perspiration - Deposition. - Deposition
**Answer**
excretion