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2 years ago

What is biomagnification?

Biology

1 answer:

tatyana61 [14]2 years ago

3 0

Answer:

Defination: Bio magnification also called biological concentration or biological amplification, is characterized by the increase in amount of some non bíodegradable substances in in successor tropic levels of a food chain.

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${ \underline{ \bigstar{ \red{ \textsf{ \textbf{Effects of Bío magnification: }}}}}}$

1. DDT interferes with the egg-shell formation in many birds. The shells remain thin and break by bird's weight during incubation. Dieldrin is about 5 times more toxic than DDT when ingested and 40 times more poisonous when absorbed.

2. Biomagnification of mercury into fish through the food chain was responsible for large number of deaths due to Minamata disease in Japan.

3. Selenium accumulates in the plants growing on selenium-rich soils. Through food chain, such plants cause stunted growth, loss of appetite, gastro-intestinal disorders, etc. in the animals grazing on such plants.

4. Due to this phenomenon our food grains such as wheat and rice, vegetables and fruits, and even meat contain varying amount of such toxic chemicals.

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Lemur [1.5K]

Answer: The answer for the first one is

1: Eukaryotic

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3 years ago

There are two alleles, B and b, at a gene locus in a population at Hardy-Weinberg equilibrium. The relative frequency of the dom

viva [34]

Answer:

210

Explanation:

Frequency of dominant allele is represented by "p"

and frequency of recessive allele is represented by "q"

Given

$p = 0.7$

Thus,

$q = 1-p\\q = 1 - 0.7 \\q = 0.3\\$

As per Hardy Weinberg's second equation of equilibrium -

$p^2 + q^ 2 + 2pq = 1\\$

Substituting the given values in above equation, we get -

$0.7^ 2+ 0.3^2 + 2pq = 1\\2pq = 1- 0.49-0.09\\2pq = 0.42$

So the total number of heterozygous individual is equal to

$0.42 * 500\\= 210$

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4 years ago

5. What do fossils of transitional links illustrate?

kicyunya [14]

Answer:A is the answer

Explanation:Hope you get it right

4 0

3 years ago

Is there an area of the brain that is processing information or giving commands?

Kay [80]

Answer:

Yes

Explanation:

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3 years ago

A grad student has a culture of E. coli with a total volume of 1,800 mL, and OD reading at 550 nm of 1.7. He transfers 1 mL cult

Naily [24]

Answer:

Explanation:

We'll represent the dilution as the volume transferred/total volume in the tube after transfer. So for the first dilution, 1 ml of culture was added into 9ml of broth bringing the total volume to 10 ml i.e 1/10

For the second dilution, 0.1 mL was added to 0.9mL of broth bringing the total volume to 1mL i.e 0.1/1.0 (this is also the same as 1/10). In relation to the stock culture, this is represented as 1/100 (that is 1/10 (first dilution) * 1/10 (second dilution)

Giving that the same was done for dilution 3 and 4,

third dilution is represented as: 1/10 and the fourth as 1/10 as well

In relation to the stock, dilution 3 is 1/1000

dilution 4 is 1/10000

a. the dilution in the third tube is $\frac{1}{1000} = 10^{3$ or 1.0* $10^{3}$