| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.51 |
| Score | 0% | 70% |
Which of the following is not a method of heat transfer?
conduction |
|
radiation |
|
reflection |
|
convection |
Heat is always transferred from warmer to cooler environments through conduction, convection, or radiation.
What part of the food chain serves only as food for other organisms?
producers |
|
primary consumers |
|
secondary consumers |
|
decomposers |
Producers (autotrophs) serve as a food source for other organisms. Typical producers are plants that can make their own food through photosynthesis and certain bacteria that are capable of converting inorganic substances into food through chemosynthesis
In a eukaryotic cell, which organelles deal with proteins?
endoplasmic reticulum |
|
ribosomes |
|
all of these deal with proteins |
|
Golgi apparatus |
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.
The heat from the Sun traveling to Earth is an example of which of the following?
electricity |
|
conduction |
|
radiation |
|
convection |
Radiation occurs when electromagnetic waves transmit heat. An example is the heat from the Sun as it travels to Earth.
Which of these parts of digestion takes place in the mouth?
breaking down proteins |
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breaking down fats |
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absorbing nutrients |
|
breaking down starches |
Digestion begins in the mouth where the teeth and tongue break down food mechanically through chewing and saliva, via the enzyme salivary amylase, starts to break starches down chemically. From the mouth, food travels down the esophagus where contractions push the food into the stomach.