« previous next »

Author Question: Air pollutants most often lead to human health problems of the A) circulatory and respiratory ... (Read 48 times)

jayhills49

  • Hero Member
  • *****
  • Posts: 559
on: Jul 16, 2018
Air pollutants most often lead to human health problems of the
 
  A) circulatory and respiratory systems.
  B) circulatory and digestive systems.
  C) integumentary and muscular systems.
  D) eyes and nasal passages.

Question 2

Over the last 90 years in the United States,
 
  A) the total area of forests has been reduced by about 90.
  B) the total area of forests has increased in size.
  C) most national forests have been clear-cut and converted to agriculture.
  D) most national forests have been replaced by commercial development.


lou

  • Sr. Member
  • ****
  • Posts: 286
Reply #1 on: Jul 16, 2018
Answer to Question 1

A

Answer to Question 2

B


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

The most dangerous mercury compound, dimethyl mercury, is so toxic that even a few microliters spilled on the skin can cause death. Mercury has been shown to accumulate in higher amounts in the following types of fish than other types: swordfish, shark, mackerel, tilefish, crab, and tuna.

Did you know?

A recent study has found that following a diet rich in berries may slow down the aging process of the brain. This diet apparently helps to keep dopamine levels much higher than are seen in normal individuals who do not eat berries as a regular part of their diet as they enter their later years.

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?

During pregnancy, a woman is more likely to experience bleeding gums and nosebleeds caused by hormonal changes that increase blood flow to the mouth and nose.

Did you know?

Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.

Caucasian Human Skull Caucasian Human Skull
Drugs used to treat respiratory disorders. Drugs used to treat respiratory disorders.
Human Tail Human Tail
The Human Eye and its Structures The Human Eye and its Structures
The traditional human karyotypes derived from a normal female and a normal male The traditional human karyotypes derived from a normal female and a normal male
Selected Broad Sense Heritability (H2) Values from Human Twin Studies Selected Broad Sense Heritability (H2) Values from Human Twin Studies
Video: Mechanisms of capillary exchange

For a complete list of videos, visit our video library