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Which process do scientists think provided earth with an oxygen-rich atmosphere?
a. spontaneous generation
b. radiometric dating
c. photosynthesis
d. respiration
Answers: 2
Biology, 22.06.2019 05:00
Explain the source of radioactivity in uranium in earth’s crust by which it produces nuclear radiation
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Biology, 22.06.2019 13:30
How do the sperm cells get from the stigma to the ovules? a. they slide down the petals to the bottom of the flower. b. they travel through pollen tubes. c. they travel along filaments. d. insects carry the sperm cells from the stigma to the ovules.
Answers: 3
Biology, 22.06.2019 15:30
Which of these would most likely be a stimulus that would cause the body to initiate feedback mechanisms a.) normal body temperature in an arctic environment b.) normal boy temperature in a tropical environment c.)light physical activity d.)low blood sugar
Answers: 2
Which process do scientists think provided earth with an oxygen-rich atmosphere?
a. spontaneo...
a. spontaneo...
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