1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Bond [772]
3 years ago
15

1. Why is it difficult to evaluate thresholds for toxic pollutants? a. Synergistic effects are difficult to account for. b. Ther

e is not enough research on the consequences of multiple exposures. c. Lack of knowledge on the effect of possible interactions of mutiple toxins. d. All of the above
Biology
1 answer:
qaws [65]3 years ago
7 0
The options are all related, and the answer is D) All of the Above. 

The synergistic effects of exposure to multiple toxins are more difficult to quantify and study. As a result, there is not sufficient research on how much a system can take when exposed to multiple pollutants. This lack of research also means that we often do not even know what the effect of these interactions between multiple toxins are.

As a result of these gaps in our knowledge of the interactions between toxins, it is difficult to evaluate the threshold for pollutants, since a system will rarely feature only one pollutant in isolation. 
You might be interested in
An increase in the permeability of the cells of the collecting tubule to water is due to a(n) ________.
OLga [1]
An increase in the permeability of the cells of the collecting tubule to water is due to an increase in production of ADH. Hormone ADH also called vasopressin is responsible for regulating the amount of water in the blood and is released from the pituitary gland based on signals from the hypothalamus, which detects the water levels of the blood. When too much water is in the blood, the hormone release is decreased and more water is excreted in the kidneys and thus increasing urine output. 
6 0
3 years ago
Which is one factor of rock types that affects the rate of weathering?
Mariulka [41]

Answer:

porosity,minerals of softness,ease of dissolving

Explanation:

6 0
3 years ago
Read 2 more answers
What is the percentage ?
Bingel [31]
40% i believe. please correct me if i am wrong.
7 0
3 years ago
________ school is identified as providing quality education to its students.
Dmitriy789 [7]

Answer:

study the material at home at a pace that suits your learning needs.

regroup in the classroom for discussions and hands-on workshops. Teachers mentors students.

further your knowledge back at home with all the insights from their class/group discussions.

5 0
2 years ago
A population of walleye increased from 1200 to 3700 from 2004 to 2006 what is the Growth rate?
Varvara68 [4.7K]

Answer:

The growth rate is 1250 per year.

Explanation:

  • First of all, lets consider the population number in both years;

The initial population is 1200, and

Final population is 3700.

  • Total increased population is (3700- 1200) = 2500

So 2500 population were increased in (2006 - 2004)= 2 years.

  • To find the annual growth rate: (Increased population/ time span in years)= 2500/2= 1250 per year.
  • Hence 1250 population was added per year in walleye from 2004 to 2006.
6 0
3 years ago
Other questions:
  • Conduction is the transfer of heat from
    8·1 answer
  • The _______________ _______________ _______________ consists of four phases: excitement, plateau, orgasm, and resolution.
    6·1 answer
  • Which domain is unique because all of the members have cells that contain nucleus?
    10·1 answer
  • Although low growling or barking is often associated with aggressive behavior, one must consider the context in which the behavi
    12·1 answer
  • Which of the following describes a role of gravity in the formation of our solar system? I. In the early stages of solar system
    7·1 answer
  • Which of the following processes does NOT occur in both plant and animal cells?
    8·1 answer
  • Why does a teenage girl needs more protein in her diet than an adult woman
    10·2 answers
  • _________ is the manipulation of the DNA of cells to change hereditary traits or produce biological products. A.Selective breedi
    12·1 answer
  • Managing crop competitors and pests has been challenging to agronomists for centuries. One approach, integrated pest management,
    11·1 answer
  • List three resources used in agriculture
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!