14C (carbon-14) can be used to date a 20,000 year old skeleton
Answer:
Double fertilization. (Ans. 5)
Explanation:
Double fertilization is a complex fertilization process occurs only in flowering plants known as angiosperm. In this process two male gametes or sperm cells fertilization occurs, first one is fertilized with the egg and form the zygote and second one is fuses with the 2 polar nuclei which cause the formation of endosperm.
In double fertilization, after the process of fertilization, the tissue of ovary forming the fruit and fertilized ovule of an ovary forming the seed.
Carbon dioxide and oxygen
Carbon dioxide features a carbon atom bonded with two oxygen atoms with a regular covalent bond to form a molecule. ... Carbon monoxide is produced by incomplete combustion, which occurs when there's a limited amount of available air that restricts the molecule to a single oxygen atom
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