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- 33. Why is it difficult to judge the scale of the problem of loss of species? Most species that exist are probably not yet named. All of these choices are true. The estimates of the number of species on Earth vary greatly, and so it’s hard to know how many species there actually are. The most common species that are yet unnamed are small and may be hard to find, such as insects, fungi and bacteria.Perhaps 98 percent to 99 percent of all species that have ever existed areextinct. Nearly all went extinct long before humans arrived on the scene. Whyshould we be concerned about the extinction of organisms today?3. If you put ALL species on Earth EVERYWHERE all at once (no more island effect), what would happen to biodixersity. a) globally on į, short term (within a minute of doing it, before anybody died) and cle ii. long term (a few years, but before any evolutionary processes could proceed?) b) locally on the short term (within a minute of doing it, before anybody died) c) locally on the long term (after a few of years, but before any evolutionary processes could proceed))
- You have now studied three different types of anatomical structures. Homologous structures show individual variations on a common anatomical theme. These are seen in organisms that are closely related. 1. Give an example of a homologous structure from this activity: Analogous structures have very different anatomies but similar functions. These are seen in organismsthat are not necessarily closely related but live in similar environments and have similar adaptations. 2. Give an example of an analogous structure from this activity: Vestigial structures are anatomical remnants that were important in the organism's ancestors but are nolonger used in the same way. 3. Give an example of a vestigial structure from this activity:14. What happens immediately after a mass extinction to the diversity of organisms? What happens thousands or millions of years later?Why, in the evolution of eukaryotes, might ithave been advantageous for separate organismsto become united into a single organism? Canyou describe analogous, more recently evolved,examples of intimate symbioses that function asa single integrated organism?
- 12) Instead of 1 uniform definition, biologist use over 20 different definitions of "species". Why? A) Because scientists searching for life on other planets do not want to be restricted to the narrow definition that applies to earth based life forms B) Because historically biologist have argued over the correct definition of this term and therefore have split into seperate "camps" for different definitions C) Because life includes both sexual and asexually reproducing organisms D) Because life is so diverse that no single definition used so far can be uniformly applied in a meaningful way to all organisms4. Which of these choices presents the three narrowest taxa (the most specific groups of related organisms) in order from broadest to narrowest? Family, Genus, Species Species, Genus, Family Order, Family, Species Family, Order, Species 5. Which of these choices presents the three broadest taxa (groups of related organisms) in order from broadest to narrowest?Domain, Kingdom, Phylum Kingdom, Class, Order Kingdom, Phylum, Genus Domain, Phylum, Order 6. Which organism has its scientific name presented correctly in binomial nomenclature? Canis familiaris Canis familiaris Canis Familiaris Canis familiaris 7. Would the following organism be a protist, fungus, bacterium or none of these? A microbe with no nucleus that contains peptidoglycan in its cell walls. 8. Fungus Protist Bacterium Not a protist, fungus, or bacterium 8.Would the following organism be a protist, fungus, bacterium or none of these? A multicellular eukaryote whose main body is a mycelium made of hyphae. Bacterium Fungus…1. You will notice that some lineages (e.g. the descendants of species 56) branched many times and are represented by many living species. Discuss the ecological conditions that you think might result in the rapid diversification of some lineages (A real world example would be the diversi- fication of the mammals at the beginning of the Cenozoic, right after the dinosaurs went extinct.)
- Which of the following organisms all belong to the same kingdom? O A. paramecium, amoeba, algae O B. bacterium, amoeba, algae O C. bacterium, moss, geranium O D. yeast, mushroom, maple treeAccording to the morphological species concept, would you classify benthics and limnetics as A) a single species B) separate species C) the species status is not clear according to this species concept. Explain in 2-3 sentences. (I think the answer is separate species, not sure how to explain this...)Part 1: Use this image to describe the relationship between H, F. and D, including how closely they are related to each other, and determine the most recent common ancestor for these species. Part 2: Using the above image, estimate how long ago the common ancestor for H, F, and D lived. Part 3: Of species H, F, and D, which have gone extinct without producing any evolutionary descendants? Provide evidence to support your answer.