Across: 2. with two symmetrical shells - mirror images of each other.
3. the term "crinoid" means
5. rocktype made of layers of sand and clay
7. multicellular organisms that often live in colonies
Down:
1. exoskeletons are made up of this material
4. lived inside their shells
6. phylum where starfish and sea urchins belong
8. individuality of coral is called

Diego conducted an experiment to find out what kind of ball bounces the highest when dropped from a five-foot platform. he used a golf ball, a tennis ball, and a soccer ball. he dropped each ball from the balcony once. diego recorded his observations after each drop. what can diego do to best improve the reliability of his results? a) drop each ball from the platform three more times b) record his observations in more than one unit c) write at least two scientific questions after the experiment is complete d) share his results with other people who have done similar experiments you for the !

Dna replication or repair occurs in a cell in all of thw following situations except when

2points what do bacteria have in common with the cells of other living organisms?