| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.97 |
| Score | 0% | 79% |
In the metric system, what prefix represents 10-3?
milli |
|
mega |
|
centi |
|
kilo |
In the metric system, milli is the prefix for 10-3.
Which of these is not a component of blood?
white blood cells |
|
marrow |
|
plasma |
|
red blood cells |
Blood is created in bone marrow and is made up of cells suspended in liquid plasma. Red blood cells carry oxygen, white blood cells fight infection, and platelets are cell fragments that allow blood to clot.
Which of these is important for the body's maintenance, growth, and repair?
protein |
|
carbohydrates |
|
fats |
|
fiber |
Found in both animal sources (meat, fish, eggs, cheese) and vegetables (beans, nuts, some grains), proteins are important for the body's maintenance, growth, and repair.
Gametes have how many pairs of chromosomes?
2 |
|
46 |
|
4 |
|
23 |
Reproductive (haploid) cells known as gametes have half as many (23) pairs of chromosomes as normal (diploid) cells. When the male gamete (sperm) combines with the female gamete (ovum) through meiosis to form a zygote, each gamete supplies half the chromosomes needed to form the normal diploid cells.
Traits represented by genes may be which of the following?
dominant |
|
recessive |
|
expressed |
|
all of these |
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.