| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.36 |
| Score | 0% | 67% |
In the classification of life, bacteria, archaea and eukaryota are which of the following?
classes |
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domains |
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kingdoms |
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species |
The broadest classification of life splits all organisms into three groups called domains. The three domains of life are bacteria, archaea and eukaryota.
Reproductive haploids are also known as:
gametes |
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ovum |
|
diploids |
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sperm |
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.
A subatomic particle found in the nucleus of an atom. It carries no electric charge. This desribes which of the following?
atom |
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neutron |
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electron |
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proton |
A neutron is a subatomic particle found in the nucleus of an atom. It is neutral as it carries no electric charge.
The pitch of the siren of an approaching ambulance changes as it approaches you. This is an example of which of the following?
refraction |
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Doppler effect |
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reflection |
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sound radiation |
The Doppler effect occurs when the source or listener (or both) of sound waves is moving. If they're moving closer together, the listener perceives the sound with a higher pitch and, when they're moving apart, the listener perceives the sound with a lower pitch.
__________ and __________ pair to strengthen bones.
vitamin D, calcium |
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iron, calcium |
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calcium, vitamin A |
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vitamin D, magnesium |
Vitamin D helps calcium strengthen bones while also aiding muscle, nerve, and immune system function.