This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: The cassava is an important food crop for people living in sub-Saharan Africa. In the 1970s, ... (Read 62 times)

ssal

  • Hero Member
  • *****
  • Posts: 572
on: Jul 16, 2018
The cassava is an important food crop for people living in sub-Saharan Africa. In the 1970s, mealybug infestations destroyed harvests and people starved.
 
  A researcher who studied the mealybug in its native environment discovered a parasitoid wasp that was a natural predator. After extensive testing to determine safety, the parasitoid wasp was introduced into the sub-Saharan region with tremendous effect controlling the mealybug throughout most of Africa. This approach represented a form of A) cultural control.
  B) natural enemies control.
  C) genetic control.
  D) natural chemical control.

Question 2

In general, the movement toward sustainability is
 
  A) declining as interest in sustainable environmental policy declines.
  B) a distant philosophical goal of the environmental movement.
  C) faced with growing opposition from economic interests.
  D) growing with greater interest from governments and businesses.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

izzat

  • Sr. Member
  • ****
  • Posts: 328
Reply #1 on: Jul 16, 2018
Answer to Question 1

B

Answer to Question 2

D


ssal

  • Hero Member
  • *****
  • Posts: 572
Reply #2 on: Jul 16, 2018
Correct answers!


izzat

  • Sr. Member
  • ****
  • Posts: 328
Reply #3 on: Jul 16, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

Medications that are definitely not safe to take when breastfeeding include radioactive drugs, antimetabolites, some cancer (chemotherapy) agents, bromocriptine, ergotamine, methotrexate, and cyclosporine.

Did you know?

Stevens-Johnson syndrome and Toxic Epidermal Necrolysis syndrome are life-threatening reactions that can result in death. Complications include permanent blindness, dry-eye syndrome, lung damage, photophobia, asthma, chronic obstructive pulmonary disease, permanent loss of nail beds, scarring of mucous membranes, arthritis, and chronic fatigue syndrome. Many patients' pores scar shut, causing them to retain heat.

Did you know?

Cutaneous mucormycosis is a rare fungal infection that has been fatal in at least 29% of cases, and in as many as 83% of cases, depending on the patient's health prior to infection. It has occurred often after natural disasters such as tornados, and early treatment is essential.

Did you know?

Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.

Did you know?

According to animal studies, the typical American diet is damaging to the liver and may result in allergies, low energy, digestive problems, and a lack of ability to detoxify harmful substances.

Alan Price - Poor People Alan Price - Poor People
U.S. suburbs were once unplanned, rambling affairs that took irregular shapes as people moved away ... U.S. suburbs were once unplanned, rambling affairs that took irregular shapes as people moved away ...
Two areas of reduced cortical volume and one area of increased cortical volume observed in people ... Two areas of reduced cortical volume and one area of increased cortical volume observed in people ...
The normal food link between sea urchins and algae/ Corals The normal food link between sea urchins and algae/ Corals
Better land and water management and appropriate crop selection can help eliminate hunger Better land and water management and appropriate crop selection can help eliminate hunger
Food Thermometers Food Thermometers
Video: Structures that affect circulation - arterioles and vasomotor responses

For a complete list of videos, visit our video library