What organelle is Excretory please help ASAP only if you know the answer

Hurry which of these is true about index fossils? a) are very scarcely found b) used as guides in relative dating c) found in the youngest layer of the rock d) used as reference points in absolute dating

2. sketch the inside of the bean nodule, and describe or label what you observed with the hand lens.

Construct at least two possible hypotheses for the student’s experiment.