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
In-s [12.5K]
3 years ago
13

How can a robin have a ddt concentration of 444 ppm even though the soil contains only 10 ppm of ddt

Biology
1 answer:
zaharov [31]3 years ago
3 0

Robin can have a ddt concentration of 444ppm while the ddt concentration of soil is 10 ppm. This happens due to biological magnification.

<u>Explanation:</u>

In biological magnification the concentration of toxic substances at successive trophic levels keeps increasing. Due to biomagnification, what starts out as a small concentration grows  while moving to successive trophic levels. DDT is a pesticide which is used to kill pests that affect crops.

DDT used in farms gets deposited in the soil. From the soil it can reach various trophic levels. At each trophic level its concentration keeps increasing.

Robin is a bird that is a secondary consumer and thus belongs to the higher trophic level. Thus even if the DDT concentration is as low as 10ppm in the soil its concentration will keep increasing and can become a high value like 444ppm.

You might be interested in
On a molecular level, explain what happens when a kite lifts into the air?
NeTakaya

The difference in air pressure which is created by the molecules in air help to move kite up into the air.

<u>Explanation:</u>

When air moves faster, pressure of air becomes less. Air moves at a faster speed above the kite than below it and so its pressure is less on top of kite. The air pressure below kite is less. This difference in pressure results in uplifting of kite. Molecules of air with high pressure exerts more force on kite from bottom and thus pushing it up in air.

The greater is the difference between air pressure above kite and air pressure below kite, greater is the amount of force exerted on kite and hence, it reaches a greater height.

7 0
3 years ago
What is the function of the swim bladder?
marshall27 [118]

Answer:

The swim bladder is located in the body cavity and is derived from an outpocketing of the digestive tube. It contains gas (usually oxygen) and functions as a hydrostatic, or ballast, organ, enabling the fish to maintain its depth without floating upward or sinking.

Explanation:

6 0
3 years ago
Read 2 more answers
As children get older, cultural influences on behavior become much stronger; and as a result, it becomes difficult, if not impos
DanielleElmas [232]

Answer:

False

Explanation:

Sex is a biological term and gender is depended on the roles performed by an individual. In our society it is mandatory for a man or woman to behave and develop sexual preference for its opposite gender and this conservative thought process had strongly held the base of defining a sexual acts which is intended to happen between a male and female only.

However, this is not something defined by nature but by individual likeliness. This is the reason why even after being a male by sex, a male by gender can have likeliness for another male. This is something which cannot be bounded by social and cultural belief even after being into it for years.

Hence, the given statement is false

3 0
3 years ago
When free energy is released during a chemical reaction it is called what of below
Nady [450]

Answer:

an exergonic reaction

6 0
3 years ago
As water changes state the water either obsorbs or releases energy. Which of these answers is a process that releases energy?
Tcecarenko [31]
B snow melting because it turn to solid t liquid which is more energy<span />
6 0
3 years ago
Other questions:
  • How do most autosomal recessive alleles that lead to lethal diseases persist in human populations?
    12·1 answer
  • What are the chromosomes found in an animal cell?
    12·2 answers
  • Nina is exploring her gender identity and sexual orientation.
    11·2 answers
  • Calculate the mass of glucose metabolized by a 78.8 kg person in climbing a mountain with an elevation gain of 1570 m . Assume t
    11·1 answer
  • The endosymbiotic theory states that chloroplasts and mitochondria evolved as a result of
    13·2 answers
  • Elements that are metals
    5·1 answer
  • cho các bazơ sau đây:NaOH ;Mg(OH)2 ;Fe(OH)2;Fe(OH)3;KOH;Ba(OH)2 bazo nào là bazo tan, không tan. Hãy gọi tên chúng
    14·1 answer
  • A hypothesis is a(n) ______________, while a theory is a(n) ______________.
    14·1 answer
  • I need help! Please I beg of you?!?
    12·2 answers
  • What do you use to calculate the pulse using LIGHT?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!