A pure substance that cannot be broken down into simpler substances by ordinary chemical means is defined as a(n) ______.

Which piece of evidence directly supports the idea that mitochondria and chloroplasts were once free-living prokaryotes?

Which of the following correctly identifies the monomer and a key role of carbohydrates?

When a neuron releases a neurotransmitter into the synaptic cleft, and that neurotransmitter diffuses across the tiny gap to act on a neighboring neuron, this is an example of what type of signaling?

In which type of bond are electrons shared equally between two atoms?

The analysis of ribosomal RNA (rRNA) sequences from mitochondria and chloroplasts has been particularly important in supporting the endosymbiotic theory because ______.

This organelle modifies, sorts, and packages proteins and lipids into vesicles for secretion or delivery to other organelles.

Organisms belonging to the domain Archaea are characterized by ______.

Organisms belonging to the domain Eukarya are characterized by ______.

What specifically happens to a bacterial cell during plasmolysis?