Ch 11: Eukaryotic Microbes and Invertebrae Infectious Agents

mitosis

process of segregating the two copies of all chromosomes evenly in the daughter cells

n to n or 2n to 2n depending on what type of cell the parent is

asexual reproduction

meiosis

process of gamete formation

2n to n

genetic diversity

increased genetic variation among offspring

a scientist observes a species switches from asexual to sexual reproduction during periods of environmental stress. what is the most likely advantage of this change?

fungi

grow in chains called hyphae or yeasts

yeast

single form cell of fungi

can do both asexual and sexual reproduction

hyphae

multicellular form of fungi

contains chitin in their cell wall (very rigid)

fungi metabolism is absorption so they spread out like roots to maximize surface area

why does mycelium form (hyphae branching)?

better nutrient absorption

benefits of growing mycelium?

easy reproduction

benefits of growing as single celled yeast

microsporidians

closely related to fungi

all of them are single celled

parasitic

opportunistic pathogen

protist

not animal nor plant

ameba

single celled protists that form pseudopods

ciliate

single celled protist with cilia

arthropod

insects like fleas and lice as well as non insects like mites

arthropod

what type is a screwworm?

invertebrae animals have complex organ systems not found in true microbes

why are some microscopic organisms such as mites and worms categorized as invertebrae parasites instead of being categorized as true microbes?

decompose organic matter

role of chemoheterotroph

dimorphic fungi

yeastlike at 37 C (human temp), moldlike at 25 C (environmental temp)

aerobic or facultative anaerobic

what possible organism could dimorphic fungi be (in terms of oxygen tolerance)?

penicillum that produces antibiotic penicillin

example of dimorphic fungi

bud

fungi asexual reproduction formation

pseudohyphal form

elongated chains of cells

budding does not completely separate

fungi are eukaryotes and share many cellular features with humans

fungal infections are difficult to treat because