| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.40 |
| Score | 0% | 68% |
__________ is caused by a lack of Vitamin C.
scurvy |
|
shingles |
|
diabetes |
|
anemia |
Scurvy is a difficiency disease caused by a lack of Vitamin C in the diet.
In cell biology, what part of the cell contains organelles?
cell wall |
|
nucleus |
|
cell membrane |
|
cytoplasm |
The nucleus of a eukaryotic cell contains the genetic material of the cell and is surrounded by cytoplasm which contains many organelles.
An endoskeleton (internal skeleton) is a charateristic of __________ animals, including humans.
vertebrate |
|
spiny |
|
arthropod |
|
sentient |
An endoskeleton (internal skeleton) is a charateristic of vertebrate animals, including humans.
Which of the following substances gives up positively charged hydrogen ions (H+) when dissolved in water?
solution |
|
acid |
|
alkaline |
|
base |
An acid is a substance that gives up positively charged hydrogen ions (H+) when dissolved in water. A base (alkaline) gives up negatively charged hydroxide ions (OH-) when dissolved in water. pH is a scale that measures of how basic or acidic a solution is. Numbered from 0 to 14, solutions with a pH of 7 are neutral, less than 7 are acidic, more than 7 are alkaline.
Gametes have how many pairs of chromosomes?
4 |
|
2 |
|
46 |
|
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.