| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.12 |
| Score | 0% | 62% |
Gametes have how many pairs of chromosomes?
4 |
|
2 |
|
23 |
|
46 |
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.
As part of digestion, the liver produces bile which breaks down:
starches |
|
fat |
|
sugars |
|
protein |
The liver produces bile which emulsifies (separates) fat.
The angle of reflection is equal to which the following?
90° |
|
focal point |
|
refractive index |
|
angle of incidence |
The law of reflection specifies how waves, including light waves, bounce off of surfaces. Specifically, the angle of incidence of the approaching wave is equal to the angle of reflection of the reflected wave as measured from a line perpendicular (90°) to the surface.
Neurons are part of the __________ nervous system.
somatic |
|
autonomic |
|
peripheral |
|
central |
The nervous system consists of the brain and spinal cord (central nervous system) and the peripheral nervous system which is the network of nerve cells (neurons) that collect and distribute signals from the central nervous system throughout the body.
Which of these is not a component of blood?
red blood cells |
|
white blood cells |
|
marrow |
|
plasma |
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.