More than 3.6 billion years！
Answer:
Ne-21
Explanation:
the 21 represents the mass number. since neon has 10 protons, the mass number is calculated by adding the number of neutrons to 10.
this is because mass number = protons + electrons
so 10 +11 =21
The answer to the question given is letter D. The cones are diploid.
The true reproduction in a pine tree is its cones which are diploid. <span> Conifers has both male and female cones. Once the ovule is fertilized, a </span>diploid<span> sporophyte is produced, which gives rise to the </span><span>embryo.</span>
General body cells (somatic cells) are diploid, meaning they have a full set of DNA. Gametes (sex cells) are haploid, because they join their nuclei at fertilization to form a complete diploid nucleus.
So:
- Sperm cell = haploid
- Liver cell = diploid
- Egg cell = haploid
- Stomach cell = diploid
Hope this helps! :)
