an egg cell has a haploid nucleus so it has half the number of dna because it fuses with a sperm cell to have the full amount of dna.
an egg cell has 23 chromosomes and a sperm cell has 23 chromosomes.
they both have half the amount of dna to form a zygote
That organelle is the mitochondria
Paramecia<span> reproduce asexually, by binary fission. During reproduction, the macronucleus splits by a type of amitosis, and the micronuclei undergo mitosis. The </span>cell<span> then divides transversally, and each new </span>cell<span> obtains a copy of the micronucleus and the macronucleus.</span>
According to the climate change, the correct order is :
<span>1 - Sources emit greenhouse <span>gases.
</span></span>CO₂ makes up the vast majority of greenhouse gas emissions from the sector, but smaller amounts of CH₄ and nitrous oxide N₂O are also <span>emitted
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2- </span>Global temperatures rise.
Temperatures measured on land and at sea for more than a century show that Earth's globally averaged surface temperature is rising<span>.
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3- </span>Snow and ice melt.
If the surface temperatures warm above 32°, the snow and ice touching the surface will warm and begin to melt<span>.
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4- </span>Sea levels rise.
When sea levels rise<span> rapidly, as they have been doing, even a small increase can have devastating effects on coastal habitats.</span>
