Friday
July 25, 2014

Homework Help: earth

Posted by raymond on Friday, May 27, 2011 at 3:37pm.

Which of the following is NOT one of the six steps of IPM?
Choose one answer.
a. evaluating and recording results.
b. properly identifying pest damage.
c. Trapping pests for return to native ecosystems.
d. learning pest and host life cycles.


Which of the following statements is true of the gypsy moth?
Choose one answer.
a. It defoliates trees, especially the oak and aspen.
b. The pest is native to the forests of northeastern North America.
c. It spreads Dutch elm disease.
d. The moth is used to control the Asian lady beetle, an exotic pest native to Japan.


Malathion, diazinon, and chlorpyrifos are organophosphate pesticides that ____.
Choose one answer.
a. kill insects by making it impossible for them to digest food and can have similar effects in people
b. are deadly to insects and are derived from the pyrethrum flower
c. are biorational pesticides derived from living organisms
d. kill insects by disrupting nervous system and brain function and can have similar effects in children


John has seen a few aphids on his garden plants. There aren't many now, but he wants to act quickly before the population increases and his vegetables are ruined. John wants the method of pest control he chooses to protect his pets and younger siblings from chemical hazards. Which of the following methods of pest control would be best and safest for John to apply now to save his garden crop?
Choose one answer.
a. genetic methods
b. a chemical insecticide
c. multicropping
d. insecticidal soap


The benefits of IPM include all but which one of the following?
Choose one answer.
a. decreased chance of pesticide resistance
b. better preservation of soil nutrients
c. total elimination of pests
d. less pesticide residue on food



Which group of organisms in the illustration above derives the greatest amount of energy directly from producers?
Choose one answer.
a. the primary consumers,which are the frog, the mouse, and the squirrel
b. the primary consumers,which are the insects, the bushes that produce the berries, and the trees that produce the acorns
c. the secondary consumers,which are the snake and the weasel
d. the secondary consumers,which are the squirrel, the weasel, and the hawk


A biome located at a high altitude would have many of the same characteristics as a biome located at a ____.
Choose one answer.
a. low latitude
b. high latitude
c. high longitude
d. low longitude


In the carbon cycle,animals and people return carbon to the atmosphere through ____.
Choose one answer.
a. evaporation
b. transpiration
c. photosynthesis
d. respiration


You are witnessing secondary succession if you see ______.
Choose one answer.
a. short grasses growing within cracks in the bare rock of a new volcanic island
b. small trees growing among the remains of a burned forest
c. a wildfire burning a tall-grass prairie
d. large animals migrating to a dense forest area


A climax community is one that ___________.
Choose one answer.
a. forms in the last stage of succession
b. forms at high-altitude locations
c. has more consumers than producers
d. first colonizes an area after an ecosystem has been disturbed


Which of the following structural adaptations would help make a species well suited to life as an herbivore on the savanna?
Choose one answer.
a. ability to spray an irritating liquid at enemies
b. a narrow, pointed beak that allows it to pull insects from rotting logs
c. heavy fur to insulate it from the cold
d. large, flat teeth for grinding plants


Which of the four types of organisms listed below would not be well adapted to a desert biome?
Choose one answer.
a. a plant that has thick leaves with a protective waxy coating
b. a plant with an extensive root system that can absorb water from a large area
c. a plant that can stay dormant for months or years when there is no precipitation
d. a plant with broad, thin leaves that undergoes rapid transpiration


Identify the factor below that makes a species more prone to extinction.
Choose one answer.
a. The species has a high rate of reproduction.
b. The species eats a wide variety of foods.
c. The species is high on food chains or food webs.
d. The species has a wide range of distribution.


A species of antelope still has a fairly large population in the wild, but its habitat is quickly disappearing. The loss of habitat has caused the population to decrease each year during the last ten years. Scientists are worried that if nothing is done, the population will continue to drop until the number of antelopes is so low that the species is in danger. This species is now
Choose one answer.
a. endangered
b. extirpated
c. extinct
d. threatened


A farmer decided to implement an integrated pest management plan. So he put up a fence around his field to keep rodents and other animals out of his potato field. He then took wood ashes and mixed them with water. He used this mixture to spray directly onto the potato plants. He reapplied after each rain shower. 4 weeks later, the farmer found a tremendous amount of crop damage, as the potato bugs had decimated the leaves of most of his plants.
Explain why his efforts didn't work, what he should have done differently, and what his next 2 steps should be.

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