| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.20 |
| Score | 0% | 64% |
Plant cells may generate energy through which of the following?
all of these |
|
anaerobic respiration |
|
aerobic respiration |
|
photosynthesis |
Some plant cells produce their own energy through photosynthesis which is the process by which sunlight, carbon dioxide, and water react to make sugar and oxygen. Animal cells cannot produce their own energy and, instead, generate energy when mitochondria consume outside sugar and oxygen through aerobic respiration.
In the heart, blood flows from the __________ ventricle to the lungs then back to the heart via the __________ atrium.
right, left |
|
left, left |
|
left, right |
|
right, right |
The two largest veins in the body, the venae cavae, pass blood to the right ventricle which pumps the blood to the lungs through the pulmonary artery. Blood picks up oxygen in the lungs and returns it to the left atrium via the pulmonary vein.
The gravitational interaction of Earth and the Moon is responsible for which of these?
tides |
|
seasons |
|
day and night cycle |
|
the northern lights |
Tides are caused by the gravitational interaction of Earth and the Moon.
As part of digestion, the liver produces bile which breaks down:
starches |
|
fat |
|
sugars |
|
protein |
The liver produces bile which emulsifies (separates) fat.
Which of the following substances gives up negatively charged hydroxide ions (OH-) when dissolved in water?
hydrogen |
|
ion |
|
base |
|
acid |
An acid is a substance that gives up positively charged hydrogen ions (H+) when dissolved in water. A base (alkaline) gives up negatively charged hydroxide ions (OH-) when dissolved in water. pH is a scale that measures of how basic or acidic a solution is. Numbered from 0 to 14, solutions with a pH of 7 are neutral, less than 7 are acidic, more than 7 are alkaline.