Which group was not described in Woese's tree of life analysis? Archaea Prokarya Eukarya Bacteria
What characteristics were used to classify organisms before Woese's tree of life analysis?
Presence of a membrane-bound nucleus Composition of the cell wall Number of cells in the organism Differences in ribosomal RNA sequences
Presence of a membrane bound nucleus
True or false? Data showing that the Bacteria were the first lineage to diverge from the common ancestor of all living organisms suggest that the Archaea and Eukarya are more closely related to each other than they are to the Bacteria.
Which of the following statements about phylogenetic trees is true?
A paraphyletic group consists of an ancestral population and all of its descendants. A paraphyletic group consists of a common ancestor and some of its descendants. A paraphyletic group has not experienced lateral gene transfer. A monophyletic group consists of a common ancestor and some of its descendants.
A paraphyletic group consists of a common ancestor and some of its descendants.
Which molecule did Carl Woese study to produce his tree of life? Ribosomal RNA DNA Messenger RNA Ribosome
What is lateral gene transfer? Physical transfer of a gene from a species in one lineage to a species in another lineage. Inheritance of a gene through mitosis Inheritance of a gene from a parent Inheritance of a gene through meiosis
Physical transfer of a gene from a species in one lineage to a species in another lineage.
Gram-positive bacteria characteristics include...
Appear purple after Gram staining, alcohol rinse does not remove crystal violet, have a thick peptidoglycan layer
Gram-negative bacteria characteristics include...
Have an outer membrane as part of their cell wall structure, alcohol rinse easily removes crystal violet, have a thin peptidoglycan layer, appear pink after Gram staining.
Require energy only from inorganic sources...
Require energy from at least one organic nutrient....
The prokaryotic cells that built stromatolites are classified as _____. proteobacteria chlamydias spirochetes gram-positive bacteria cyanobacteria
The prokaryotic cells that were the first to add significant quantities of oxygen to Earth's atmosphere are classified as _____. proteobacteria chlamydias spirochetes gram-positive bacteria cyanobacteria
Streptococcus aureus is classified with _____. proteobacteria chlamydias spirochetes gram-positive bacteria cyanobacteria
Organisms that can cause nongonococcal urethritis are classified with _____. proteobacteria chlamydias spirochetes gram-positive bacteria cyanobacteria
The chemoheterotroph Proteus vulgaris is a rod-shaped bacterium classified with _____. proteobacteria chlamydias spirochetes gram-positive bacteria cyanobacteria
Spiral-shaped bacteria are likely to be placed with _____. proteobacteria chlamydias spirochetes gram-positive bacteria cyanobacteria
According to this phylogenetic tree, which of these pairs of prokaryotic subgroups share the most recent common ancestor?
What advantage do organisms that reproduce sexually have over organisms that reproduce asexually? Their offspring may have more mutations. Their offspring are bigger and better able to reproduce. Their offspring may be more adaptable to changes in the environment. Their offspring can exist in both haploid and diploid stages.
Their offspring may be more adaptable to changes in the environment.
Which term describes the fusion of two gametes to form a diploid zygote? Syngamy Mitosis Alternation of generations Meiosis
Which term describes the multicellular haploid form of a protist that shows alternation of generations? Gametophyte Zygote Sporophyte Spore
Which structure mediates the attachment of spores to a surface on which to grow?
Holdfast Flagella Sporophyte Chloroplast
Which of the following statements about Ulva's haploid stage is true? Gametes of the same mating type fuse to produce a diploid zygote. Haploid cells produce gametes by meiosis. The haploid Ulva cells are genetically identical to their diploid parents. Haploid cells are produced by meiosis of diploid cells.
Haploid cells are produced from meiosis of diploid cells.
How does the haploid form of Ulva "switch" to its diploid form? Gametophytes produce cells that undergo meiosis and produce spores that germinate into diploid adults. Sporophytes undergo meiosis to produce spores that germinate into diploid adults. Sporophytes produce cells that undergo mitosis to produce gametes that fuse to form a zygote. Gametophytes produce cells that undergo mitosis to produce gametes that fuse to form a zygote.
Gametophytes produce cells that undergo mitosis to produce gametes that fuse to form a zygote.
True or false? Organisms that exhibit alternation of generations reproduce sexually in the diploid stage.
Angiosperms are most closely related to _____.
green algae gymnosperms bryophytes charophyceans seedless vascular plants
Which of these was the dominant plant group at the time that dinosaurs were the dominant animals? gymnosperms bryophytes seedless vascular plants angiosperms charophyceans
This is an image of a(n) _____. seedless vascular plant angiosperm bryophyte gymnosperm charophycean
Plants evolved from green algae approximately _____ million years ago.
3,500 475 2,200 130 400
_____ are an example of seedless vascular plants. Pine trees Mosses Ferns Charophyceans Lilacs
The living plants that are most similar to the first plants to bear gametangia are the _____. bryophytes charophyceans seedless vascular plants gymnosperms angiosperms
Which of these is a male gametophyte?
In pines, the female gametophyte contains _____, each of which contains a(n) _____. antheridia ... egg archegonia ... sperm cell antheridia ... sperm cell microsporangia ... egg cell archegonia ... egg
archegonia ... egg
In pines, an embryo is a(n) _____. immature female gametophyte food reserve for the immature sporophyte immature sporophyte seed immature male gametophyte
In pine trees, pollen grains get to the ovule via the _____. megaspore integument pollen cone eggs micropyle
Which of these statements is true about the gametophyte tissue that surrounds the pine embryo? It functions as a haploid food reserve. It functions as a diploid food reserve. It develops from the fusion of a microspore and a megaspore. It functions as a triploid food reserve. It is the remnant of the pollen tube.
It functions as a haploid food reserve.
Of the four haploid cells produced by a pine cone's megasporocyte (megaspore mother cell), _____ survive(s).
In the pine, microsporangia form _____ microspores by _____.