ch. 26- protists
members of which protist group is one of the fossilized deposits in the unique geological formation of the white cliffs of dover
foraminiferans
members of the _____ are thought to have given rise to plants
green algae
pseudopodia are used by amoeba for ingesting food as well as for
locomotion
which eukaryotic organelles likely arose from symbiotic relationships between larger cells and bacteria
mitochondria and chloroplasts
which protist group typically contains of amoeboid cells surrounded by a hard outer shell through which cytoplasmic projections extend
rhizarians
foraminiferans are rhizarians
true
the archaeplastids include the red algae and the green algae
true
the stramenopiles include water molds, diatoms, golden algae, and brown algae
true
most protists are _____, with each cell forming a complete organism capable of performing all the function characteristics of life
unicellular
the surface of a paramecium is covered with thousands of short, hair-like _______
cilia
which protist group is characterized by having a micronucleus and a macronucleus
ciliates
some protists consist of a single cell with multiple nuclei. this condition is known as
coenocytic
in primary endosymbiosis, an ancient eukaryotic cell engulfed a _______, which survived and evolved into a chloroplast
cyanobacterium
which algal group contains individuals that are typically unicellular and form siliceous shells
diatoms
members of which group are known to form blooms known as red tides
dinoflagellates
which protist clade is characterized by their greatly modified mitochondria
excavates
which protist group contains the organism trypanosoma, a colorless parasite that can cause african sleeping sickness
excavates
what is the translation of "pseudopodia", a characteristic of the amoebas
false feet
red tides are caused by red algae
false- dinoflagellates
land plants are thought to have arisen most directly from a red algal ancestor
false- green algae
within ciliates, what do the micronuclei control
reproduction
explain why chanoflagellates are thought to be of particular evolutionary importance
-closest relative to animals -striking resemblance to collar cells in sponges -evidence supporting the close relationship between choanoflagellates and animal includes comparative DNA sequence data of mitochondrial and nuclear genes
members of the ____ move via pseudopia
amoebozoa
name the structure that allows motility in the following groups: amoebozoa, excavates, and ciliates
amoebozoa: pseudopodia excavates: flagella ciliates: cilia
which type of protist is responsible for malaria in humans, parasitic to both humans and mosquitoes
apicomplexans
most protists are
aquatic
amoebozoans move by means of flagella
false- pseudopodia
provide three diseases caused by protozoa. include the casual organism, the group in which it is classified, and its means of transmission when possible
unikonts, amoebozoa-- entamoeba histolytics, amoebic dysentery, transmitted via contaminated water excavates, trypanosomes-- trypanosoma causes african sleeping sickness, transmitted via tsetse flies chromalveolates, alveolates, apicomplexans-- plasmodium causes malaria, transmitted via a mosquito