Bio Ch. 25

Which pair of alternatives is highlighted by the life cycle of the cellular slime molds, such as Dictyostelium?
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Which pair of alternatives is highlighted by the life cycle of the cellular slime molds, such as Dictyostelium?
unicellular or multicellular
In a sample of pond water, a new organism is identified with the following characteristics: It consists of 70 cells surrounded by rigid cell walls that join the cells together. Inside each of these identical cells are mitochondria and chloroplasts. Such an organism would most likely be classified as a
colonial photosynthetic eukaryote.
All protists are
eukaryotic.
Protists areI)complex at the cellular level, even though they're simple compared with other eukaryotes.II)typically water-living.III)mostly unicellular.IV)exclusively heterotrophic.
I, II, and III
The best evidence for not classifying the slime molds as fungi comes from slime molds'
DNA sequences.
The life cycle of the malarial parasite, Plasmodium, includes
a haploid stage diploid inside the human host and both haploid and diploid stages in the mosquito.
Why is the filamentous morphology of the slime molds considered a case of convergent evolution with fungi?
DNA sequence analyses indicate that slime molds descended from different unicellular ancestors than did fungi.
Which group is incorrectly paired with its description?
red algae-acquired plastids by secondary endosymbiosis
Biologists think that endosymbiosis gave rise to mitochondria before plastids partly because
all eukaryotes have mitochondria (or their remnants), whereas many eukaryotes do not have plastids.
The oldest fossil eukaryote that can be resolved taxonomically is of
a red alga that lived 1.2 billion years ago.
Which of the following is correctly described as a primary producer?diatomPlease use the following information to answer the questions below.You are given four test tubes, each containing an unknown protist. Your task is to read the following description and match these four protists to the correct test tube.When red and blue light are shone on the tubes, oxygen bubbles accumulate on the inside of test tubes 1 and 2. Chemical analysis of test tube 1 indicates the presence of a chemical that is toxic to fish and humans. Chemical analysis of test tube 2 indicates the presence of substantial amounts of silica. Microscopic analysis of organisms in test tube 3 reveals the presence of an apicoplast in each. Microscopic analysis of the contents in test tube 4 reveals thousands of cilia on the surface of the organism.Test tube 4 containsParameciumOf the four supergroups of eukaryotes, which one contains red algae, green algae, and all land plants?ArcheplastidaWhich two genera have members that can evade the human immune system by frequently changing their cellular membrane surface proteins?1. Plasmodium2. Trichomonas3. Paramecium4. Trypanosoma1 and 4What does scientific evidence indicate to be the correct sequence of these events, from earliest to most recent, in the evolution of life on Earth?1. origin of mitochondria2. origin of multicellular eukaryotes3. origin of chloroplasts4. origin of cyanobacteria5. origin of fungal-plant symbioses4, 1, 3, 2, 5