| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.19 |
| Score | 0% | 64% |
Which of the following describes the Earth's outer core?
solid |
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makes up most of the Earth's volume |
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primarily solid |
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liquid |
The Earth's core is divided into the liquid outer core (1,430 miles or 2,300 km radius) and the solid inner core (745 miles or 1,200 km radius).
In a eukaryotic cell, which organelles deal with proteins?
all of these deal with proteins |
|
Golgi apparatus |
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ribosomes |
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endoplasmic reticulum |
The nucleus of a eukaryotic cell contains the genetic material of the cell and is surrounded by cytoplasm which contains many organelles. Ribosomes produce proteins, endoplasmic reticulum helps synthesize proteins and fats, and Golgi apparatus prepares proteins for use.
When light travels between two substances it bends. This is called:
refraction |
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conduction |
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convection |
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reflection |
Because different materials have different refractive indices, light changes speed when passing from one material to another. This causes the light to bend (refraction) at an angle that depends on the change in refractive index between the materials. The greater the difference, the higher the angle of refraction.
Gametes have how many pairs of chromosomes?
4 |
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23 |
|
2 |
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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.
In the metric system, what prefix represents 10-3?
centi |
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kilo |
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mega |
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milli |
In the metric system, milli is the prefix for 10-3.