What are. Some of nicolaus copernicuses achievments

1 answer:

5 0

Nicolaus Copernicus was a Renaissance mathematician and astronomer. He was the first to formulate a comprehensive heliocentric cosmology with the Sun, instead of the Earth, as the center of the Universe. The distance of the planets from the sun was in direct relationship to the size of their orbits.

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Which plant division has seeds with a 3n endosperm due to double fertilization?

matrenka [14]

Answer:

Angiosperms have seeds with an 3n endosperm due to double fertilization.

Explanation:

Double fertilization is found only in flowering plants.
In angiosperms, the female gametophyte does not grow after reaching eight nucleate stage.
After fertilization and triple fusion, the zygote and primary endosperm are created and further growth of embryo sac continues.
Triple fusion is the fusion of two haploid polar nuclei of female gametophyte and one male nuclei. This results in a 3n nucleus.
The developing embryo obtains nutrition from the endosperm.
If fertilization fails no endosperm is formed.

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3 years ago

The robotic rover Curiosity has instruments that detect radiation both inside the spacecraft and in the Mars environment. What i

oksian1 [2.3K]

Explanation:

The planet Mars has two moons. Phobos and Delmos (i) phobos has period `7` hours, `39` minutes and an orbital radius of `9.4 xx 10^(3) km`. Calculate the mass of Mars. (ii) Assume that Earth and mars move in a circular orbit around the sun, with the martian orbit being `1.52` times the orbital radius of the Earth. What is the length of the martian year in days? `(G = 6.67 xx 10^(-11) Nm^(2) kg^(-2))`

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3 years ago

Which structures are found in the human female reproductive system?

jek_recluse [69]

Answer:

The answer is A ovaries and uterus

Explanation:

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3 years ago

Soil aeration is caused by ____.

stellarik [79]

Worms wold be the best n