What calcium-rich formation builds the internal skeleton of echinoderms?

Which type of organism evolved later than the others? mammals amphibians reptiles fish

What are greenhouse gases?

Counting tree rings is an example of which type of dating

What is the largest internal organ in the body

Explain the steps of the life cycle of a star. Beginning with a nebula and ending with old age/death of a star, explain each step in a star's life cycle.

What is directly responsible for an acquired trait

Which statement best describes a physical change? Changes can occur to certain chemical properties of the substance, but the overall shape of the substance will remain the same.

What are catalysts that speed up reactions in living things called? A. Biocatalysts B. Enzymes C. Cellular facilitators D. Polymers

Offspring that are genetically unique are the result of mitotic reproduction. vegetative reproduction. asexual reproduction. sexual reproduction.

Are dinosaurs bones biotic or abiotic