A farmer uses DDT to kill insects in his field. The first year nearly all of the insects were killed. By the fourth year, however, nearly all of the insects survived the DDT treatment. Explain the process of natural selection in this population of insects. Include these words - mutation, phenotype, variation, resistance, adaptation, and differential survival.

A farmer uses DDT to kill insects in his field. The first year nearly all of the insects were killed. By the fourth year, however, nearly all of the insects survived the DDT treatment. Explain the process of natural selection in this population of insects. Include these words - mutation, phenotype, variation, resistance, adaptation, and differential survival.

Biology: The Unity and Diversity of Life (MindTap Course List)

15th Edition

ISBN:9781337408332

Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Chapter47: The Biosphere

Section: Chapter Questions

Problem 12SQ

See similar textbooks

Similar questions

Testing Biological Control Ant-decapitating phorid flies are just one of the biological control agents used to battle imported fire ants. Researchers have also enlisted the help of Thelohania solenopsae, another natural enemy of the ants. This microsporidian (Section 23.4) is a parasite that infects ants and shrinks the ovaries of the colony's egg-producing female (the queen). As a result, a colony dwindles in numbers and eventually dies out. Are these biological controls useful against imported fire ants? To find out, USDA scientists treated infested areas with either traditional pesticides or pesticides plus biological controls (both flies and the parasite). The scientists left some plots untreated as controls. FIGURE 45.28 shows the results. FIGURE 45.28 A comparison of two methods of controlling red imported fire ants. The graph shows numbers of imported fire ants over a 28-month period Orange triangles represent untreated control plots. Green circles are plots treated with pesticides alone Black squares are plots treated with pesticide and biological control agents (phorid flies along with a microsporidian parasite). 3. If this study had ended after the first year, would you conclude that biological controls had a major effect?
______ are members or the phytoplankton. a. Water molds b. Diatoms c. Giant kelps d. Cellular slime molds
Draw the insect inside the damaged host Pest: Army Worm/ Cutworm Scientific Name:______________________________ Most damaging stage of this pest: ____________________________________ Host Range: ___________________________ Regions in the Country Affected: __________________________________
Parasites always kill their hosts. True False
Spcies Total Number Elmidae Adult 6 (1 dead) Elmidae larva 8 (2 dead) water mite 2 Caddisfly 1 Group macroinvertebrates into highly sensitive to pollution, somewhat tolerant of pollution, or pollution tolerant categories
Think about thrush. This is an example of what type of parasite? A. thallus, fungus B. yeast, single celled fungus C. mold, multicellular fungus D. nematode
Common Name: Rice Weevil Scientific Name: Sitophilus oryzae Host Range: _____________ Economic Damage: ____________ Most Damaging Stage: ___________
Organism cannot exist without a host is?select the true option a. Facultative parasite b. Obligate parasite c. Facultative saprophyte d. None of them
NEED ASAP THANKS Sexual reproduction of parasite occurs on what kind host? a. paratenic host b. definitive host c. temporary host d. intermediate host
Create a food web for a Altamaha shiner (Cyprinella xaenura).. HELP ASAP!!
Name 5 families of agricultural importance (pest and/or beneficial) for the following orders: 1. orthoptera 2. Coleoptera 3. Lepidoptera 4. Diptera 5. Hymenoptera 6. Hemiptera
A non-motile parasite belongs to the kingdom Protista and infects the human liver. This parasite is transferred to the human body by a/an____