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

Author Question: The Long-Term Ecological Research sites (LTER) collectively focus on studying A) natural ... (Read 79 times)

fasfsadfdsfa

  • Hero Member
  • *****
  • Posts: 554
on: Jul 16, 2018
The Long-Term Ecological Research sites (LTER) collectively focus on studying
 
  A) natural successional changes in ecosystems.
  B) the effects of various types of human disturbances to ecosystem function.
  C) how to make invasive species profitable for agriculture.
  D) the creation of artificial soils for ecosystems lacking producers.

Question 2

Blood lead levels in children between 1996 and 2012 have
 
  A) increased steadily despite EPA and CDC programs to eliminate lead from the environment.
  B) continued to decrease as exposure to lead has been reduced.
  C) remained about the same.
  D) increased in rural areas but declined in urban areas with heave vehicular traffic.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

aham8f

  • Sr. Member
  • ****
  • Posts: 336
Reply #1 on: Jul 16, 2018
Answer to Question 1

B

Answer to Question 2

B


fasfsadfdsfa

  • Hero Member
  • *****
  • Posts: 554
Reply #2 on: Jul 16, 2018
Thank you :)


aham8f

  • Sr. Member
  • ****
  • Posts: 336
Reply #3 on: Jul 16, 2018
Happy to help you


« previous next »
 

Did you know?

In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).

Did you know?

Certain topical medications such as clotrimazole and betamethasone are not approved for use in children younger than 12 years of age. They must be used very cautiously, as directed by a doctor, to treat any child. Children have a much greater response to topical steroid medications.

Did you know?

Elderly adults are at greatest risk of stroke and myocardial infarction and have the most to gain from prophylaxis. Patients ages 60 to 80 years with blood pressures above 160/90 mm Hg should benefit from antihypertensive treatment.

Did you know?

The use of salicylates dates back 2,500 years to Hippocrates's recommendation of willow bark (from which a salicylate is derived) as an aid to the pains of childbirth. However, overdosage of salicylates can harm body fluids, electrolytes, the CNS, the GI tract, the ears, the lungs, the blood, the liver, and the kidneys and cause coma or death.

Did you know?

As the western states of America were settled, pioneers often had to drink rancid water from ponds and other sources. This often resulted in chronic diarrhea, causing many cases of dehydration and death that could have been avoided if clean water had been available.

A 3-tonne (3.0-long-ton; 3.3-short-ton) great white shark off Isla Guadalupe A 3-tonne (3.0-long-ton; 3.3-short-ton) great white shark off Isla Guadalupe
Alexander Fleming photographed in his lab where he observed the natural competition between a fungus Alexander Fleming photographed in his lab where he observed the natural competition between a fungus
the comet Encke riding along its pebbly trail of debris (long diagonal line) between the orbits of M the comet Encke riding along its pebbly trail of debris (long diagonal line) between the orbits of M
Blending inheritance formed the basis of nineteenth-century critiques of evolution by natural select Blending inheritance formed the basis of nineteenth-century critiques of evolution by natural select
Natural hazards Natural hazards
Operations Research Operations Research
Video: Regulation of GFR: autoregulation via tubuloglomerular feedback, neural & hormonal regulation

For a complete list of videos, visit our video library