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Answer:
Double fertilization
Explanation:
The phenomenon of double fertilization is unique to flowering plants (i.e., angiosperms). Each pollen grain produces two male gametes (sperm cells), one of which fertilizes the egg to form the zygote, whereas the other sperm fuses with polar nuclei in the female gametophyte in order to form a triploid cell (3n) called endosperm. Subsequently, this endosperm will support embryonic growth by supplying storage nutrients and by serving as a mechanical barrier during seed development and germination.
Answer:
Fred Hoyle
Explanation:
Sir Fred Hoyle FRS was an English astronomer who formulated the theory of stellar nucleosynthesis. He also held controversial stances on other scientific matters—in particular his rejection of the "Big Bang" theory, a term coined by him on BBC radio, and his promotion of panspermia as the origin of life on Earth
For the leaves to be presearved as fossil, they have to undergo a natural process of carbonization. This involves a slow chemical reaction with water over time that allows oxygen, nitrogen, and hydrogen to escape the leaves’ structure as gases leaving behind a carbon skeleton/film.
Oak
Explanation:
Based on the fossil arrangement, we can deduce that the oak was the first to evolve of all the listed fossils.
Fossils are the preserved remains of organisms usually found in rock layers.
To predict the age of fossils, we use one of the principle of relative dating.
The most appropriate one proposed by Williams Smith is the principle of fossil and fauna succession.
It states that "fossils and fauna succeed one another in relative pattern as they evolve".
- The first fossil to evolve will be the oldest one and it will be located at the base of the sequence.
- This is why the choice is oak.
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