| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.09 |
| Score | 0% | 62% |
Cellular fermentation takes place:
aerobically |
|
in the presence of oxygen |
|
anaerobically |
|
in plant cells |
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, omnivores may be which of the following?
primary or secondary consumers |
|
secondary or tertiary consumers |
|
secondary consumers or scavengers |
|
primary or tertiary consumers |
Secondary or tertiary consumers may be omnivores.
A biological community of interacting organisms and their physical environment is known as:
community |
|
biome |
|
population |
|
ecosystem |
An ecosystem is a biological community of interacting organisms and their physical environment. This includes both the biotic (living) and abiotic (non-living).
A major difference between sound waves and light waves is which of the following?
a sound wave is mechanical while a light wave is electromagnetic |
|
a sound wave cannot travel through a vacuum |
|
a sound wave is much slower than a light wave |
|
all of these are correct |
A vibrating object produces a sound wave that travels outwardly from the object through a medium (any liquid or solid matter). The vibration disturbs the particles in the surrounding medium, those particles disturb the particules next to them, and so on, as the sound propagates away from the vibration.
The Sun is a __________-type main-sequence star.
G |
|
D |
|
E |
|
S |
The Sun is a G-type main-sequence star (G2V) but is informally known as a yellow dwarf star. Composed of 73% hydrogen and 25% helium, the hot plasma that makes up the Sun reaches 9,900°F (5,505°C) at the surface. It formed approximately 4.6 billion years ago and makes up 99.86% of the mass in the solar system.