Quiz Questions Flashcards
What is the purpose of heat fixation?
To adhere the specimen to the slide so it isn’t lost during the staining procedure.
What is the purpose of the safranin in the gram stain procedure?
The safranin is pink colored counter-stain that gram negatives will absorb after being destained.
What color will gran negative bacteria be after iodine? What about gram positive?
both will be blue/purple.
Why might a gram + look pink after the gram stain is finished, assuming that all chemicals are functional?
The destaining process lasted too long, causing even the gram positives to lose their crystal violet.
What are the smaller circular DNA molecules that are not a part of the genomic DNA of a bacterial cell called?
Plasmid
Do single celled protists have membrane-bound organelles?
NO
What is the closest multicellular relative to diatoms?
Brown algae
What is the purpose of the apical complex (apicomplexan)?
To help in the penetration of the host cell.
What is a common characteristic of alveolates?
They all have membrane enclosed sacs called alveoli.
What protist is this? How can you tell? What disease does it cause?
Plasmodium (apicomplexan), you can tell by the apical complex. It causes malria.
Are plasmodial slime molds autotrophs or heterotrophs?
heterotrophs
What protist are all of these? What are each of these organisms?
These are green algae
a. Chlamydomonas
b. Spirogyra
c. Ulva (sea lettuce)
Other than the different pigment, what makes red algea so different from other algae?
They lack flagella
What chlorophyll pigments does green algae possess?
Chlorophyll A and chlorophyll B
What are some products made from red algae?
Agar
Carrageenan
Nori (sushi wrapper)
What are some shared derived characteristics of plants?
Alternation of generations
Multicellular, dependent embryos
Walled spores produced in sporangia
Multicellular gametangia
What type of cell division is performed within the sporangium?
Meiosis
What single cell organism divides to form the sporophyte?
Zygote
What are the difference between a moss and a fern?
Moss - gametophyte dominant multicellular organism, lack true roots, no xylem or phloem
Fern - Have true roots, dominant sporophytes, have xylem and phloem
Male and femal gamete?
Sperm and egg
Why is fertilization of seed plants good for life on land?
Doesnt rely on water
What does an ovule develop into?
Seed
Where is the male gametophyte found in pines?
Pollen grain
What is the function of the endosperm?
Nutrition of the embryo
