Cell Theory
Which invention in the 1600s first enabled scientists to observe cells? and which scientist named the empty chambers "cells"?
Microscope
Prokaryotic cells lack this membrane-bound structure that contains DNA.
nucleus
This organelle supplies energy (ATP) for the cell via cellular respiration.
mitochondria
This term describes an organism made of only one cell.
unicellular
This term describes the process of maintaining a stable internal environment.
homeostasis
Which scientist named the empty chambers "cells"?
Robert Hooke
Bacteria belong to this group of living things made of very simple cells.
prokaryotes
These small particles of RNA and protein make proteins and can be free or attached to rough ER.
Ribosomes
In organisms with many cells, cells are __________, meaning they have different jobs.
specialized
This type of feedback slows down or stops a change to keep conditions stable.
Negative
Which 19th-century scientist observed bacteria dividing and concluded that new cells come from existing cells?
Robert Virchow
This type of microscope is the most common and uses light and lenses to form an image.
Compound light microscope
Organelle that modifies, sorts, and packages proteins for storage or secretion.
Golgi Apparatus
This type of organism depends on communication between cells to maintain homeostasis.
multicellular
The product of a reaction causes more of the reaction to occur.
Posistive feedback
This statement disproved the idea of spontaneous generation.
cells come from pre‑existing cells
This limits how clear images can be under a light microscope.
resolution
Organelle that captures light energy and contains chlorophyll (and is found only in plants and some protists).
Chloroplast
This level of organization is made of different tissues working together.
organ
Sweating when your body temperature rises is an example of this type of feedback.
Negative feedback
Plants, animals, fungi, and bacteria all share this basic characteristic.
All living things are made of cells
This kind of electron microscope produces detailed 3‑D images of a specimen’s surface.
Scanning electron microscope
List the sequence of organelles involved in protein synthesis and transport from production to export
nucleolus-ribosomes-rough ER-vesicles, golgi apparatus
The correct order of biological organization from simplest to most complex.
cells-tissues-organs-organ systems-organism
The response a human experiences when a virus is detected in the bloodstream as an internal stimulus.
immune response or increase in core body temperature