| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.43 |
| Score | 0% | 69% |
Which of these is not a phase in cell division?
cytokinesis |
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megaphase |
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anaphase |
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interphase |
Cell division is the process by which cells replicate genetic material in the nucleus and consists of several phases, beginning with interphase and ending with cytokinesis.
The gravitational interaction of Earth and the Moon is responsible for which of these?
day and night cycle |
|
the northern lights |
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tides |
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seasons |
Tides are caused by the gravitational interaction of Earth and the Moon.
The asteroids in the Kuiper belt are composed of which of the following?
gaseous methane, ammonia, and water |
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frozen methane, ammonia, and water |
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minerals |
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rock |
The Kuiper Belt is similar to the asteroid belt but much larger. Extending beyond the orbit of Neptune, it contains objects composed mostly of frozen methane, ammonia, and water. Most notably, the Kuiper Belt is home to Pluto, a dwarf planet that, until a 2006 reclassification, was considered the ninth planet of the solar system.
A subatomic particle found in the nucleus of an atom. It carries no electric charge. This desribes which of the following?
electron |
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atom |
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proton |
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neutron |
A neutron is a subatomic particle found in the nucleus of an atom. It is neutral as it carries no electric charge.
Plant cells are surrounded by:
a cell membrane and a cell wall |
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only a cell membrane |
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only a cell wall |
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neither a cell membrane nor a cell wall |
Animal cells are surrounded by a semipermeable membrane which allows for the transfer of water and oxygen to and from the cell. In plant cells, the cell membrane is surrounded by a somewhat rigid cell wall which provides the cell structure and support.