| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.25 |
| Score | 0% | 65% |
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.
This skeletal system is common in arthropods like insects, spiders, and crustaceans.
vertebrate |
|
exoskeleton |
|
endoskeleton |
|
bone |
An exoskeleton (external skeleton) is common in arthropods like insects, spiders, and crustaceans.
A large naturally occurring community of flora and fauna occupying a major habitat is:
a community |
|
a biome |
|
a population |
|
a food chain |
A biome is a large naturally occurring community of flora (plants) and fauna (animals) occupying a major habitat (home or environment).
In the heart, blood flows from the right __________ to the lungs then back to the heart via the left __________.
atrium, ventricle |
|
ventricle, atrium |
|
ventricle, ventricle |
|
atrium, atrium |
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 Sun is a __________-type main-sequence star.
G |
|
S |
|
D |
|
E |
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.