Answer:
four billion years ago the earth had a layer of ozone gas
Environmental law is the correct answer.
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They both use a reproductive strategy called alternation of generations, where there are two different reproducing morphologies: a diploid sporophyte, and a haplod gametophyte. The sporophyte produces spores by meiosis (2N -> N), which disperse and form the gametophyte, which produces gametes by mitosis (N ->N). Two of those gametes fuse to create a diplod zygote (N + N -> 2N), which becomes the new sporophyte
There are differences between the two types of plants, especially the relative size of the sporophytes and gametophytes, but they both use this kind of reproductive strategy.
Answer: mRNA is transcribed from DNA and carries information needed for protein synthesis. During the translation phase of protein synthesis, the tRNA carry specific amino acids the the ribosome, and rRNA plays a role in the synthesis of the ribosome which is the site of translation phase of protein synthesis.
Explanation: