The diagram represents a food pyramid. The concentration of the pesticide DDT in individualorganisms at level D is higher than the concentration in individuals at level A because DDT is
A. produced by organisms at level C ingested by
those in level D
B. passed through levels A, B, and C to organisms
at level D.
C. excreted by organisms at level A as a toxic
waste.
D. synthesized by organisms at level D.

Answers

Answer 1

Answer:

Answer:

The answer is "Choice b".

Explanation:

In the given question diagram is missing. so first, we define the diagram after that we explain why the above given choice is correct.

In the attached file the food pyramid can be a divide into the level, in which the D pesticides use the "dichloro-diphenyl-trichloroethane ", which concentration is higher than its entities from the level of A because DDT is transferred with species at level D by levels A, B, and C, that's why the choice "b" is correct.

Related Questions

2. Sperm and egg combine in ______________ to produce a zygote with the normal number of chromosomes.
True or false: the resistances measured in this experiment are large. typical values are more than 1000 ω.
“I do not need to use a citation if I paraphrase because I put it in my own words.”Why is this statement inappropriate?
The antibiotic ciprofloxacin often is prescribed for serious cases of food poisoning caused by the bacterium Campylobacter jejuni, which is common in the intestines of farm animals and is not harmful to them, but may cause acute food poisoning in humans. Which of the following is correct given prolonged use of this antibiotic? (A) Prior to antibiotic treatment, most Campylobacter are ciprofloxacin-resistant. (B) Ciprofloxacin treatment kills or halts the growth of the sensitive strains, yet the resistant strains survive. (C) Repeating the treatment of the same patient or a population multiple times results in a strain of Campylobacter that is more susceptible to the antibiotic. (D) Treatment with ciprofloxacin causes the patient to evolve resistance such that the next time the patient gets an infection, it will no longer be effective.
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Which of the following statements is true?O Cold blooded animals have cold blood.
Cold-blooded animals change their body temperature to match the environment.
Mammals and birds are usually cold blooded.
All of the above.

Answers

Answer:

Explanation:

Cold blooded animal did not have cold blood.

Cold blooded animals can’t change their body temperature to match the environment.

Mammals and birds are not cold blooded.

Final answer:

Endotherms, such as mammals and birds, are able to maintain a constant body temperature in the face of changing environmental conditions. In contrast, cold-blooded animals, or ectotherms, have a body temperature that matches their environment and varies with it.

Explanation:

An animal that maintains a constant body temperature in the face of environmental changes is called an endotherm. These animals are able to maintain a level of activity that an ectothermic animal cannot because they generate internal heat that keeps their cellular processes operating optimally even when the environment is cold.

Mammals and birds evolved endothermy, meaning they regulate their body temperature from the inside through metabolic or physical changes. This allows them to maintain a relatively stable body temperature regardless of the outside temperature.

Cold-blooded animals, also known as ectotherms, rely on external temperatures to set their body temperature. Their body temperature varies with the environment.

Very small changes in the solute concentrations in the various fluid compartments cause water to move from one compartment to another, which alters blood composition and blood pressure. How do the following physiological changes affect blood pressure?a. Decrease water reabsorption
b. Decrease peripheral resistance
c. Vasodilation
d. Decrease salt intake
e. Decrease blood volume
f. Vasoconstriction
g. Increase peripheral resistance
h. Increase salt intake
i. Increase blood volume
j. Increase water reabsorption

Answers

Answer:

a. Decrease water reabsorption: decrease blood pressure.

b. Decrease peripheral resistance: decrease blood pressure

c. Vasodilation: decrease blood pressure

d. Decrease salt intake: decrease blood pressure

e. Decrease blood volume: decrease blood pressure

f. Vasoconstriction: increase blood pressure

g. Increase peripheral resistance: increase blood pressure

h. Increase salt intake: increase blood pressure

i. Increase blood volume: increase blood pressure

j. Increase water reabsorption: increase blood pressure

Explanation:

Total peripheral resistance: This term refers to the resistance offered by the vascular system to the blood flow. This resistance is a result of the friction between the blood and the vessel's walls. In other words, it is the opposition of the vessels to blood flow. The total peripheral resistance is the summary of all the bloody circuit resistances in the body. Those mechanisms that induce vasoconstriction conduce to an increase in total peripheral resistance, while mechanisms that induce vasodilation provoke a decrease in total peripheral resistance.

Blood pressure: This term refers to the strength applied by the blood against the vessel walls as it flows. This pressure is determined by the bombed blood strength and the volume as well as by the vessel size and flexibility. Blood pressure changes continuously according to the activity, temperature, diet, emotional state, among others.

Salt ingestion causes an increase in plasmatic osmolarity, stimulates thirst, and hence, water ingestion. Sodium retains water, expanding the blood volume and causing an increase in vessel pressure.
The antidiuretic hormone, also known as vasopressin hormone, is released by changes in serum osmolarity or blood volume. Its function is to keep homeostasis and make kidneys conserve or keep water by concentrating urine and by reducing its volume. By these actions, the antidiuretic hormone stimulates water reabsorption, according to the organism´s needs.
Kidneys control blood pressure in many ways. If the pressure is elevated, kidneys produce the loss of salt and water, normalizing arterial pressure. But if pressure is low, kidneys conserve water.

What is the volume of a block charger (must be in centimeters)

Answers

Answer: $\lim_(n \to \infty) a_n \neq √(x) x^(2) \n$

Explanation:

_________14. In photorespiration, carbondioxide is produced in the _________ when glycine is converted to serine.A. Peroxisome B. Lysosome C. Mitochondria D. Chloroplast

Answers

Answer:

Option D, chloroplast

Explanation:

The process of photorespiration starts in the chloroplast when oxygen attaches to the RuBP. This produces three compounds namely – a) Three carbon compound (3-PGA) and b) Two carbon compound (phosphoglycolate). 3-PGA act as an intermediate to the Calvin cycle and before entering this cycle two of its carbon are removed. To recover lost carbon, plants taken in carbon through series of reactions involving phosphoglycolate. One fourth of the total carbon transported through this pathway is released as CO2. Since this entire process takes place in chloroplast, it can be said that CO2 is produced in chloroplast

Hence, option D is correct

Erythrocytes might the best of example of form equals function because they lack many organelles. What organelles are absent in erythrocytes?

Answers

Mature mammalian red blood cells lack nuclei, mitochondria and rough endoplasmic reticulum, they do not contain DNA and consequently, cannot divide. They also cannot synthesise RNA nor synthesise any new proteins, and consequently, have a limited lifespan. Mature red blood cells circulate for about 100–120 days in the body before they are removed by the spleen.

Hope this helps

The expected ratio of phenotypes among the progeny of a test cross is 1:1:1:1. Out of 200 total resulting progeny, 48 occur in one of the four phenotypic classes. Given this information, which of the following must also be true?1) Since 48 is so close to the expected value, there is no need to calculate chi square before drawing a conclusion about the ratio.
2) At least one additional cell must also contain a count of 48.
3) The value of observed - expected for this cell = -2.
4) The progeny of this cross do not conform to a 1:1:1:1ratio.

Answers

Answer: The progeny of this cross do not conform to a 1:1:1:1 ratio

Explanation: This is because out of the 200 total resulting progeny, we must have 50 in each phenotype class to conform with the 1:1:1:1 which is not so as we have 48 in one of the phenotypic class already. Therefore, it did not conform to the ratio.

Answer:

The value of observed - expected for this cell = -2

Explanation:

"With a total of 200, the expected number in each cell when the predicted ratio is 1:1:1:1 = 50. The observed number is 48." - Mastering Genetics

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