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Blood leaves the _______ _______ of the heart and goes directly to the kidneys for cleaning?

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Related questions

Science Grade 9:

Mr. Zajac wants to conduct an experiment to see if Red Bull energy drink makes plants grow faster. He takes plant #1 and puts it on a ledge that gets lots of sunshine. He waters this plant with 100 mL of water everyday. He takes plant #2, puts it on the ledge beside plant #1, and pours 100 mL of Red Bull on it twice a day, once when he wakes up, and once before he goes to bed. (3 marks)

Ā 

a. Is this a fair test? Explain why or why not. (2 marks)

Ā 

b. What would you recommend to Mr. Zajac to fix his experiment?

Fill in the blank:

In a                   ___ environment, both animal and plant cells ___                             ___ as the water

moves                     the cell through the process of                       , Animal cells would die. In plant

cells this process is called plasmolysis, or the plant cells are                            ___ (shrink) - this is when

the plasma membrane pulls away from the cell wall, as excess water goes out of the cell. The cell wall protects

the plan cell from dying right away and they can go back to normal when the concentration of solutes is lowered on 

the                         ___ of the cell. When this happens, the water will move from a ___    solution 

towards a ___                             solution through the process of ___                ___.

Randomized controlled trials (RCTs) are the strongest research design for establishing cause and effect. Which of the following is the main limitation of RCTs?

a) RCTs may not be ethical for some studies.

b) RCT design cannot control for confounders.

c) Randomized controlled trials may have a disproportionate number of people exposed to the risk factor.

d) Randomized controlled trials are, by their very design, likely to be very biased towards an expected outcome.

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