Chat with AIExam 12: Characterizing and Classifying Eukaryotes
Fungi and insects both use the nitrogenous polysaccharide (cellulose/chitin/silica) as a protective molecule in their outer surfaces.
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Verifiedchitin
Compare and contrast mitosis and meiosis using words, diagrams or both.
(45) VerifiedMitosis involves a single round of nuclear division, whereas meiosis involves two rounds. They both include the same four phases: prophase, metaphase, anaphase, and telophase; meiosis involves two rounds of each phase. Both meiosis and mitosis are preceded by interphase, during which DNA replication takes place. In meiosis, the homologous chromosomes line up to form tetrads early in prophase I. This event, which does not occur in mitosis, allows crossing over of homologous chromosomes to take place. Crossing over provides the genetic recombination of meiosis. The sister chromatids separate in anaphase in mitosis. In meiosis, the homologous (non- sister) chromatids separate during anaphase I, and the sister chromatids separate during anaphase II. The end result of mitosis is two diploid nuclei with identical chromosomes, whereas the final result of meiosis is the production of four haploid nuclei that are not genetically identical.
Which of the following is a protozoan stage that allows for transmission of intestinal parasites from one host to another?
(36) VerifiedD
A field biologist finds an unfamiliar single- celled organism in a sample from the surface of a marshy area. What observations or tests would make it possible to determine whether it is a protozoan, fungus or alga? Assume the PCR machine at the field station is not working, but all other equipment is.
(43) Modified hyphae that allow fungi to derive nutrients from other living organisms are (septate/pseudohyphae/haustoria).
(37) The vegetative stage of a protozoan is called a (cyst/merozoite/trophozoite).
(49) The fever and chills associated with malaria are due to the release of uninucleate daughter cells of Plasmodium called (merozoites/schizonts/coencytes).
(39) Which of the following is associated with meiosis but not with mitosis?
(28) The (dinoflagellates/radiolarian) are protozoa that produce cell walls composed of silica.
(34) Protozoa that have a single large mitochondrion and are found living in animals are
(34) The (fungi/algae/lichens) are so sensitive to pollutants they are used as indicators of environmental conditions.
(30) The asexual reproductive spores produced at the tips of hyphae and are not enclosed in a sac are (conidiospores/ascospores/sporangiospores).
(37) Fungal spores produced asexually within a sac- like chamber at the tip of a hypha are called
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