| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.80 |
| Score | 0% | 76% |
Menstruation occurs when:
the ovum becomes fertilized |
|
the fetus is formed |
|
the zygote is formed |
|
the ovum fails to become fertilized |
If the ovum fails to become fertilized, the lining of the uterus sloughs off during menstruation. From puberty to menopause, this cycle of menstruation repeats monthly (except during pregnancy).
An endoskeleton (internal skeleton) is a charateristic of __________ animals, including humans.
vertebrate |
|
arthropod |
|
spiny |
|
sentient |
An endoskeleton (internal skeleton) is a charateristic of vertebrate animals, including humans.
Convert -20C° to F°.
-4 |
|
78 |
|
36 |
|
-36 |
To convert from C° to F° use:
\(F° = {9 \over 5}C° + 32\)
\(F° = {9 \over 5}(-20) + 32\)
\(F° = {-180 \over 5} + 32\)
\(F° = -36 + 32 = -4\)
Saturated fats can __________ LDL ("bad") cholesterol while unsaturated fats can __________ it.
decrease, stabilize |
|
raise, decrease |
|
decrease, raise |
|
stabilize, raise |
Saturated fats can raise LDL ("bad") cholesterol while unsaturated fats can decrease it.
Water freezing or boiling is an example of which of the following?
phase transition |
|
sublimation |
|
cooling |
|
heating |
A substance undergoes a phase transition when it moves from one state of matter to another, for example, when water freezes or boils.