Question

stromatolites are.
a) layered rock structures built by cyanobacteria
b) ancient volcanic formations
c) fossilized animals
d) chemical deposits from hot springs
which scenario best explains how early life survived before photosynthesis evolved?
a) all organisms lived on land where conditions were milder.
b) early organisms were much larger and more resilient.
c) organisms used chemical energy from their harsh environment.
d) life existed in a dormant state until conditions improved.
what characteristic made early prokaryotes different from modern eukaryotic cells?

Explanation:

Stromatolites are layered rock - like structures formed by cyanobacteria. Before photosynthesis evolved, early organisms used chemical energy from their environment. Early prokaryotes were simpler than modern eukaryotic cells.

Answer:

1. a) Layered rock structures built by cyanobacteria
2. c) Organisms used chemical energy from their harsh environment