What is in the cloud of negativity charger particles that surrounds an atom?​

Explain how paleontologists use trilobite fossils as index fossils for various geologic time periods.

Which of these statements is true about autotrophs, but not heterotrophs? a. they use sugar and oxygen to make carbon dioxide and water.b. they use chlorophyll and oxygen to make carbon dioxide and water.c. they use sunlight, water, and carbon dioxide to make sugars.d. they use sunlight, water, and oxygen to make chlorophyll.

Which process is represented a.) deletion b.) nondisjunction c.) translocation d.) insertion