Ques:Q: When flagellated sperm must swim to the egg, sexual reproduction requires the presence of what substance? Choices: - air - nitrogen - sunshine - water A:

Ans:water
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Ques:Q: What does the base of a nucleotide within dna consist of? Choices: - ribosomes - protein - hydrogen - nitrogen A:

Ans:nitrogen
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Ques:Q: What organs filter wastes from blood so they can be excreted from the body? Choices: - lungs - pancreas - liver - kidneys A:

Ans:kidneys
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Ques:Q: The vast majority of what phenomena occurs along one of three types of plate boundaries? Choices: - tornados - hurricane - volcanoes - earthquake A:

Ans:
earthquake
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