| 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 consumers or scavengers |
|
primary or tertiary consumers |
|
secondary or tertiary consumers |
Secondary or tertiary consumers may be omnivores.
Molecules and atoms that are inputs to a chemical reaction are known as which of the following?
reactants |
|
products |
|
fuel |
|
components |
During a chemical reaction molecules and atoms (reactants) are rearranged into new combinations that result in new kinds of atoms or molecules (products).
Which of the following is not true of light waves?
are mechanical waves |
|
can travel through a vacuum |
|
travel faster than sound waves |
|
are electromagnetic waves |
Unlike mechanical sound waves that require a physical medium for propagation, light waves are electromagnetic and can travel through empty space. Light waves are also much faster, travelling at 186,000 m/s vs. 343 m/s for sound waves.
A dominant trait will be expressed when paired with:
a dominant trait |
|
a recessive trait |
|
a chromosome |
|
a gene |
The traits represented by genes are inherited independently of each other (one from the male and one from the female gamete) and a trait can be dominant or recessive. A dominant trait will be expressed when paired with a recessive trait while two copies of a recessive trait (one from each parent) must be present for the recessive trait to be expressed.
Which of these vitamins doesn't come from food?
A |
|
C |
|
D |
|
Potassium |
Vitamins are necessary for a wide variety of bodily processes. Some vitamins like Vitamins A and C come from diet but others, like Vitamin D, are generated in response to sunlight.