Biology Test 1

• They can’t metabolize
• Or respond to stimuli
• Or reproduce on its own-has to enter a host’s cell and have the host replicate for them.

• Characteristics
• * Single celled
• * Prokaryotic Cell- Lacks a nucleus and other membrane-bound organelles
• * Circular DNA and small ribosomesCell membrane and cell wall

• Differences for Bacteria
• * Ether bonds
• * No fatty acids
• * Has histones on DNA
• * Introns on DNA

• Characteristics
• * Single celled
• * Prokaryotic Cell- Lacks a nucleus and other membrane-bound organelles
• * Circular DNA and small ribosomes
• * Cell membrane and cell wall

• Differences from Archaea
• * Ester bonds
• * Fatty acids
• * No histones
• * No introns

• Eurkaryotic cells- contain membrane bound organelles
• Many have cell wall of cellulose or chitin
• Membrane based on fatty acids
• Contains Kingdoms Protista, Plantae, Fungi, and Animalia

Kingdom Plantae Characteristics of all: Cell wall with cellulose, choroplasts, not all are photosynthetic, but at least have accessory pigment

• 1. Mosses:
• * Non-Vascular
• * Seedless Plants
• * Spores and gametes

• 2. Ferns:
• * Vascular
• * Seed-producing plants
• * Spores and gametes

• 3. Gynosperms:
• * Cone Plants
• * Vascular
• * seed-producing
• * Naked seeds

• 4. Angiosperms:
• * Flowing plants
• * Flowers and seed surrounded by a fruit