Biology, 22.07.2019 03:00 talanna394

Which of these implants itself into the wall of the uterus during pregnancy?

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Biology, 21.06.2019 18:00, shelbyo1123

The phlogiston theory in the 17th century attempted to explain burning. the theory stated that combustable objects contained a material called phlogiston, a substance without mass, color, odor, etc. after objects burned, the objects were dephlogistonated and were then in their true form. the phlogiston theory was accepted until the 18th century, when lavoisier proved that combustion requires a gas that has mass. phlogiston is considered a) to be scientific knowledge b) not to be scientific knowledge c) to be proven by scientific method d) to be accepted in the modern scientific community

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Biology, 22.06.2019 05:50, Kittylover65

Which of the organisms listed below performs nitrogen fixation? a. legumes b. plants c. bacteria d. fungi

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Biology, 22.06.2019 09:10, Oliviapuffinburger33

Describe the two types of vascular tissue

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Biology, 22.06.2019 09:30, zahwaahmaf

Parthenogenesis is a type of reproduction that does not require a mate. it’s rarely seen in birds and higher vertebrates. parthenogenesis involves the formation of a zygote. but this zygote is formed without fertilization. in parthenogenesis, in the absence of a male gamete, the ovum develops directly in the zygote.