Biology: The Unity and Diversity of Life (MindTap Course List)
15th Edition
ISBN: 9781337408332
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Chapter 21, Problem 14SQ
Summary Introduction
To match: The material with its most suitable description.
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Match each material with its most suitable description. ___ limestone a. extracted from kelps ___ chert b. a dried red alga ___ alginates c. rocky radiolarian remains ___ nori d. extracted from red algae ___ carrageenan e. remains of foraminifera
A stromatolite is a structure ________ .a. produced by endosymbiosisb. that forms when a meteorite hits the Earthc. consisting of layered bacteria and sedimentd. that expels hot water from deep in the Earth
How was the number of different species in Lake Whillans determined?a. counting individual cellsb. analyzing the DNA recovered from the samples
c. growing the cells and then classifying them according to theirstructural characteristicsd. measuring the concentration of cells in each milliliter of lake water
Chapter 21 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
Ch. 21 - Summoning Moaquitoes Parasites sometimes alter...Ch. 21 - Prob. 2DAACh. 21 - Prob. 3DAACh. 21 - Prob. 4DAACh. 21 - Prob. 1SQCh. 21 - Diplomonads, and parabasalids lack _______. a. a...Ch. 21 - Radiolaria and diatoms have a shell of _______. a....Ch. 21 - Prob. 4SQCh. 21 - Diatoms produce _______ that help(s) them float....Ch. 21 - Prob. 6SQ
Ch. 21 - ______ are members or the phytoplankton. a. Water...Ch. 21 - Prob. 8SQCh. 21 - Prob. 9SQCh. 21 - Prob. 10SQCh. 21 - Prob. 11SQCh. 21 - Prob. 12SQCh. 21 - Prob. 13SQCh. 21 - Prob. 14SQCh. 21 - Prob. 15SQCh. 21 - Which groups or protists would you be most likely...Ch. 21 - Apicomplexans evolved from a photosynthetic...Ch. 21 - Diplomonads have neither mitochondria nor...
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- A high concentration of oil helps _______ stay afloat and makes them useful in biofuel production. a. foraminiferans c. dinoflagellates b. radiolarians d. diatomsarrow_forwardIn cladistics, the only taxon that is always correct as a clade is the _______. a. genus b. family c. species d. kingdomarrow_forward_____ is produced from red algae. a. Diatomaceous earth b. Chert c. Carrageenan d. both b and carrow_forward
- SCIENTIFIC INQUIRY • DRAW IT Mosquitoes resistant to thepesticide DDT first appeared in India in 1959, but now are foundthroughout the world. (a) Graph the data in the table below.(b) Examine the graph, then hypothesize why the percentageof mosquitoes resistant to DDT rose rapidly. (c) Suggest anexplanation for the global spread of DDT resistance. Month 0 8 12 Mosquitoes Resistant* to DDT 4% 45% 77% *Mosquitoes were considered resistant if they were not killed within 1 hour of receivinga dose of 4% DDT.Data from C. F. Curtis et al., Selection for and against insecticide resistance andpossible methods of inhibiting the evolution of resistance in mosquitoes, EcologicalEntomology 3:273–287 (1978).arrow_forwarda stromatolite is a structure a. produced by endosymbiosisb. that formed only on the early Earthc. consisting of layered bacteria and sedimentd. that expels hot water from deep in the Eartharrow_forwardAmong plants, three different generaSolanum, Petunia and Datura are placed in which family?A. Cancidae B. SolanaceaeC. Felis D. Felidaearrow_forward
- Biologists at NASA are studying new life forms found in the arctic and have collected an unknown specimen that appears to have a cell membrane, ribosomes and mitochondria. This specimen could be… a.a bacterium b. a virus c. an archaeon d. any one of the above e. a eukaryotearrow_forwardAbiogenesisa. refers to the spontaneous generation of organisms from nonliving matter. b. explains the development of life forms from preexisting life forms c. only takes place in the absence of aseptic technique. d. was supported by Pasteur’s swan-necked fl ask experiments.arrow_forwardFossil films made by ______ are usually black or dark brown.arrow_forward
- "Foraminifera and coccolithophore shells (calcareous sediments) are more commonly found ______. a. in the Atlantic Ocean b. in the North Pacific Ocean c. in the Southern Ocean d. in the eastern Pacific Ocean just north of the equatorarrow_forwardDiscovery of Iridium in the KPg Boundary Layer In the late 1970s, geologist Walter Alvarez was investigating the composition of the KPg boundary layer in different parts of the world. He asked his father, Nobel Prizewinning physicist Luis Alvarez, to help him analyze the elemental composition of the layer. The Alvarezes and their colleagues tested the K-Pg boundary layer in Italy and Denmark, and discovered that it contains a much higher iridium content than the surrounding rode layers (FIGURE 16.17). Iridium belongs to a group of elements that are much more abundant in asteroids and other solar system materials than they are in Earths crust. The Alvarez group concluded that the KPg boundary layer must have originated with extraterrestrial material. Sample Depth Average Abundance of Iridium (ppb) +2.7m 0.3 +1.2m 0.3 +0.7m 0.36 boundary layer 41.6 0.5 m 0.25 5.4 m 0.30 FIGURE 16.17 Abundance of iridium in and near the KPg boundary layer. Iridium content of rock samples above, below, and at the KPg boundary layer in Stevns Klint, Denmark. Sample depths are given as meters above or below the layer. ppb, parts per billion. An average Earth rock contains 0.4 ppb iridium; the average meteorite, 550 ppb. The photo shows Luis and Walter Alverez next to the KPg boundary layer in Stevns Klint. What was the iridium content of the KPg boundary layer?arrow_forwardThe scientific name for corn is Zea mays. Zea is the (a) specific epithet (b) genus (c) class (d) kingdom (e) phylumarrow_forward
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