Biology Practicum Flashcards
The three shapes of bacteria
Cocci, spirilla, and Bacilli
What shape does Cocci have?
Spherical shape
What shape does Spirilla have?
Spiral
What shape does Bacilli have?
Rod shaped
Has more peptidoglycan
Gram Positive
Have less peptidoglycan
Gram Negative
Differential stain that distinguishes positive (+) from negative (-) bacteria
Gram stain
What color does Gram-positive turn when stained?
Purple
What color does Gram-negative turn when stained?
Reddish-pink
A specific organism that is known to cause many skin ailments
Staphylococcus Aureus
A specific organism that is known to cause scarlet fever, toxic shock syndrome, bacteremia, pneumonia, and more
Streptococcus pyogenes
These are Eukaryotic organisms that are generally unicellular
Protists
The “cool art”
Freshwater and Marine Diatoms
A single-celled organism; lives in water
Euglena
Name all 7 Protists
Freshwater/Marine Diatoms, Euglena, Amboeba Proteus, Entamoeba Histolytica, Trypanosoma gambiense, Paramecium, and Stentor
A parasitic protist
Entamoeba Histolytica
Found in blood of infected individuals; causes African Sleeping Sickness
Trypanosoma gambiense
__________: Phylum = __________
Sponges; Porifera
Their bodies have many passageways for water to flow through
Sponges
A sponge with spicules made of calcium carbonate (calcareous sponge)
Grantia
Provide structural support for most sponges
Sponge spicules
Aquatic invertebrates with special cells used to catch prey
Cnidaria
Reproduces asexually and forms colonies; made of polyps
Obelia: Hydroid (1st gen.)
Reproduces sexually and swims freely
Obelia: Medusa (2nd gen.)
Sea anemone; uses stinging cells to capture prey
Metridium
Fresh water invertebrate that is able to regenerate tissues, not age, and has special nematocysts (stinging cells)
Hydra
Flatworms characterized by unsegmented bodies and bilateral symmetry
Platyhelminthes
Flatworm that can regenerate and HAS eyespots
Planaria
A parasitic tapeworm that can infect humans due to eating raw meat
Taenia Pisiformis
Flat fluke (with NO eyespots) that infects the human liver
Clonorchis sinensis
A parasitic flatworm and blood fluke that infects human bladder and intestine arteries
Schistosoma mansoni
Roundworms, about half of which are parasitic
Nematodes
A parasitic nematode AKA “small intestinal roundworm”
Ascaris megalocephala
May be male or female
Ascaris megalocephala
Are smaller and have the presence of a spicule
Male Ascaris
Parasitic roundworm known to cause trichinellosis. Results in diarrhea, abdominal pain, and vomiting
Trichinella spiralis
May lead to brain or heart damage
Trichinella spiralis
Clams and Mussels
Bivalve
Have two shells that hinge and are filter feeders
Bivalve
Keep shells closed
Adductor muscles (anterior and posterior)
Thin membrane attached to the inside of the shell
Mantle
Thin membrane under the mantle that connect to incurrent and excurrent siphons. Respiration occurs upon water entry
Gills
Tough muscular structure used in movement
Foot
Extend from the visceral mass towards the hinge at the back
Intestines
Thin piece of tissue near mouth opening
Labial palps
Located near the visceral mass
Mouth
Small lump by intestines near the hinge
Heart
Consists of stomach, digestive glands, and gonads
Visceral mass
Name the 4 Cnidaria
Obelia wm (hydroid), Obelia Medusa, Metridium cs & ls, and Hydra
Name the 4 Platyhelminthes
Planaria, Taenia pisiformis, Clonorchis sinensis, and Schistosoma mansoni
Name the 2 Nematodes
Ascaris megalocephala and Trichinella spiralis