Explanation:
The embryonic stage is the third to the eighth week after fertilization. that should be the ansewr
Answer:
Explanation:
The four (4) phyla of a gymnosperm include Cycadophyta, Gynkophyta, Gnetophyta, and Coniferophyta. The below information shows the correctly suitable matches for the right description.
Carl woese and his colleagues built a tree of life by comparing rrna ribonucleotide sequences of a variety of living organisms- The most fundamental division among organisms is between Archaea, Bacteria, and Eukarya.
Carl Woese challenged one of the core biological beliefs in 1977. Biologists had previously assumed that there were two main lineages of life on Earth: the eukaryotes (which include animals, plants, fungi, and some unicellular organisms like paramecium) and the prokaryotes (all remaining microscopic organisms). In reality, Woese found there to be three main lineages. There are two different groups of organisms within what were once referred to as prokaryotes, and they are as unrelated to one another as they were to eukaryotes. Woese proposed a classification system in 1990, and as a result of his work, it is now generally acknowledged that there are three main divisions of living systems: the Eukarya, Bacteria, and Archaea.
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