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In ponds, male frogs release their sperm in the water. Females also release their eggs in the water. After a few weeks, tadpoles appear. How did the frogs reproduce?
1sexual reproduction through internal fertilization
2sexual reproduction through external fertilization
3asexual reproduction through external fertilization
4asexual reproduction through internal fertilization
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Biology, 21.06.2019 15:30
*will mark brainliest to first correct answer* photosynthesis led to increasing levels during the later proterozoic eon? a. oxygen b. water c. carbon dioxide d. none of the above
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Biology, 21.06.2019 20:00
How did the miller-urey experiment impact the way scientists think about the origins of life? use what you know about the miller-urey experiments to discuss the factors needed for life to arise, and speculate on whether life could arise on another planet.
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Biology, 22.06.2019 13:30
Describe the change in phase and temperature as water moves from the oceans to the atmosphere and then returns to earth again as rain. a) evaporation : temperature increases; condensation : temperature decreases; precipitation (rain) : temperature decreases b) evaporation : temperature increases; condensation : temperature decreases; precipitation (rain) : temperature increases c) evaporation : temperature decreases; condensation : temperature decreases; precipitation (rain) : temperature decreases d) evaporation : temperature increases; condensation : temperature increases; precipitation (rain) : temperature decreases
Answers: 1
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In ponds, male frogs release their sperm in the water. Females also release their eggs i...
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