Challenge 1
Classify a hot-spring organism
Decide whether the organism is prokaryotic or eukaryotic without treating ribosomes as a distinguishing feature.
Application library0/4 attempted
B.5B·Biology·Biomolecules & Cells
Cell Complexity in the real world
Compare prokaryotic and eukaryotic cells, including evidence for endosymbiotic theory.
Transfer evidence, not just familiar practice
Correctly solve different fresh variations at least 24 hours after your first correct transfer response. Reviewing the same challenge again does not count as fresh retention evidence.
You can explore every situation now. Practice unlocks after you retain B.5A.
Career · Microbiology and biotechnology
Microbiology research station
Researchers classify a heat-loving microbe and investigate the evolutionary origin of chloroplasts in algae. Their evidence includes DNA organization, ribosomes, and organelle division.
Why this TEKS matters
Cell structures provide evidence for classification and for the endosymbiotic origin of organelles used in modern research.
Challenge 2
Trace chloroplast ancestry
Explain how independent division and bacterial-like ribosomes support endosymbiotic theory.
Everyday life · Antibiotics and science exhibits
Medicine and microscope evidence
A pharmacist explains why an antibiotic targets bacteria more than human cells, and a science exhibit asks visitors to identify an unfamiliar cell from a microscope image.
Why this TEKS matters
Similarities and differences among cells explain selective antibiotic action and prevent overly broad conclusions from a single image.
Challenge 3
Explain selective antibiotic action
Use ribosome binding to explain why the drug inhibits bacterial protein synthesis more strongly.
Challenge 4
Identify a mystery cell
Use the nucleus, wall, mitochondria, and missing chloroplasts to make only the conclusions the evidence supports.