| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.44 |
| Score | 0% | 69% |
Which of the following is not a method of heat transfer?
conduction |
|
reflection |
|
convection |
|
radiation |
Heat is always transferred from warmer to cooler environments through conduction, convection, or radiation.
Food is mixed with gastric acid and pepsin in the __________ to help break down protein.
large intestine |
|
small intestine |
|
mouth |
|
stomach |
Food is mixed with gastric acid and pepsin in the stomach to help break down protein.
Gametes have how many pairs of chromosomes?
46 |
|
23 |
|
2 |
|
4 |
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.
During digestion, the kidneys filter substances from the blood. Which of the following is not filtered by the kidneys?
salt |
|
minerals |
|
fats |
|
water |
Chemical waste like excess water, minerals, and salt are filtered from the blood by the kidneys and secreted into the urine. Urine is transported from the kidneys to the bladder through ureters.
The angle of reflection is equal to which the following?
focal point |
|
angle of incidence |
|
refractive index |
|
90° |
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.