BIOLOGY HIGH SCHOOL

Look at Figure 30–2. Filtered blood leaves the kidney and returns to circulation through theA. renal artery.
B. renal vein.
C. urinary bladder.
D. urethra.
Look at Figure 30–2. Filtered blood leaves the kidney and - 1

Answers

Answer 1
Answer: The answer is A. renal vein. 

Renal veins drain the kidneys and carry the blood filtered by kidneys. Renal artery cannot be the right choice because it carries blood to the kidneys. Urinary bladder collects urine from the kidneys. Urethra connects urinary bladder to the external urethral orifice. Therefore, the only correct choice is renal vein (A).

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What are the three stages of volcanic activity

Answers

The three stages of volcanic activity are active, dormant, and extinct.

An active volcano is one which has recently erupted and there is a possibility that it may erupt soon. A dormant volcano is one which has not erupted in a long time but there is a possibility it can erupt in the future. Last, but not least an extinct volcano is one in which it has no magma activity and shows no signs of ever erupting again.

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The three stages of volcanic activity are active, dormant, and extinct.

DDT was widely used as a pesticide for 20 years. Its use was banned after studies showed severe side effects were evident in humans, the environment, and animals as a result of DDT. Why were the side effects of DDT so harmful?A. DDT kills insects and other pests.
B. DDT decomposes.
C. DDT was genetically engineered.
D. DDT bioaccumulates.

Answers

Out of the choices given, the side effects of DDT were so harmful because of the DDT bioaccumulates. The correct answer is D.

Answer: D. DDT bioaccumulates

Bioaccumulation is the accumulation of substances or compounds such as pesticides, fertilizers or other chemicals in the body of the organisms. These substances or compounds are toxic and remain undigested in the body of the organisms are transferred subsequently in a food chain, when one organism is consumed by another organism. The highest trophic level is most effected because of the concentration of the toxic substance is the maximum.

DDT (dichlorodiphenyltrichloroethane) is a colorless, odorless and tasteless crystalline chemical compound. It is used as a pesticide to kill pests in agricultural field. DDT is highly toxic chemical compound. It remains undigested in the body of the organism and transferred in a food chain when one organism is consumed by another organism. The effect of DDT is magnified several times in the top most trophic level in the food chain due to bioaccumulation.

Activity 2: THE IMPACT OF CORRUPTION AND FRAUD [35 marks]

Answers

Corruption and fraud can have devastating effects on a person and the institution that he or she is working for.  When you combine these two elements a lot of people can get hurt financially and emotionally.  It’s bad enough that you falsify certain documents for a transaction but it gets worse when you abuse your power by doing cruel and unjust things.  If caught, a person could be convicted and sent to jail and the institution that he worked would be shut down leaving honest employees unemployed.
Corruption and fraud are both very damaging elements to any society. These things usually start showing themselves and become problematic in the higher eschelons of society where large sums of money or other services can make people corrupted. This makes society operate on a worse level. Another thing would be fraud which is straight-out illegal and isn't something people should be doing in the first place. 

In the nature via nurture issue, nature refers to __________.a. environment
b. heredity
c. conception
d. pollination

Answers

Answer:

B) heredity

Explanation:
environment. In the nature via nurture issue, nature refers to environment.

Which blood vessel carries oxygenated blood to the heart
I need it urgently ​

Answers

Answer: Pulmonary veins
The pulmonary veins bring oxygen-rich blood to the left atrium.

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The blood vessel that carries oxygenated blood to the heart is the pulmonary vein. It transports the oxygen in the form of blood from the lungs back to the left atrium of the heart.

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C. food molecules
D. damaged organelles

Answers

The central vacuole is a large membrane-bound organelle which is present in all plant and fungal cells and some animals with main function to maintain turgor pressure in the cell. The vacuole contains mostly water, but also  ions, salts, waste products, nutrients, and sometimes pigment molecules. According this, in addition to water, fold molecules are most likely to be found in a plant central vacuole. Correct answer: C
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