| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.42 |
| Score | 0% | 68% |
In fermentation, what replaces oxygen in anaerobic respiration?
starches |
|
water |
|
ascorbic acid or peptides |
|
lactic acid or alcohol |
If no oxygen is present, cellular respiration is anaerobic and will result in fermentation where either lactic acid or alcohol is used instead of oxygen.
In the food chain, consumers are classified as which of the following?
secondary |
|
all of these |
|
primary |
|
tertiary |
Most animals consume other organisms to survive. Consumers (heterotrophs) are divided into three types, primary, secondary, and tertiary, based on their place in the food chain.
Earth's troposphere layer is which of the following?
hottest |
|
coldest |
|
farthest from the surface |
|
closest to the surface |
The Earth's atmosphere has several layers starting with the troposphere which is closest in proximity to the surface. Containing most of the Earth's breathable air (oxygen and nitrogen), it's a region with warmer temperatures closer to the surface and cooler temperatures farther away which results in the rising and falling air that generates weather.
An endoskeleton (internal skeleton) is a charateristic of __________ animals, including humans.
arthropod |
|
vertebrate |
|
sentient |
|
spiny |
An endoskeleton (internal skeleton) is a charateristic of vertebrate animals, including humans.
Which of the following temperatures is least like the others?
32°F |
|
-273°C |
|
absolute zero |
|
0K |
Absolute zero is the coldest possible temperature in the universe. In the Kelvin scale, absolute zero is 0K and in the Celsius scale it is -273°C.