Sources of heat from inside earth is radioactive decay and residual heat.
Gregor Mendel planted garden peas and used them as the basis of his study of inherited traits. They do not mature slowly.
That would be A. Produces reproductive organs which produce a zygote.
Zygotes grow into the sporophyte(diploid), spores grow into the gametophyte(haploid).
Sporophyte produces haploid spores through meiosis, gametophyte produces gametes through mitosis.
Are cracks in Earth’s crust cause rocks to break and move are younger that surrounding rocks