In desperate need can somebody me with 2 & 3? ?

Which best describes this behavior? it is beneficial only to the males that do not fertilize eggs. it is beneficial only to the female workers that are not fertilized. it is beneficial to each one of the individual colony members. it is beneficial to the whole species, but not to all of the individual members.

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

When the oxygen produced by photosynthetic plants in the water dissolves in the water, which of these is being formed?