Answer:
There were multiple transitions from water to land.
Explanation:
Protostomes are species whose mouth develops near the blastopore such as mollusks, annelids, and arthropods. Protostomes originated alongside deuterostomes and xenacoelomorphs. Deuterostomes anus forms near the blastopore and mouth form at the other end. These distinct adaptation patterns were observed in living taxas and are believed to evolve in the gaps of phylogenetic pattern during the transition from water to land.
In metazoans phylogeny, such gaps are frequent in protostomes and deuterostomes. The differences in the embryonic development depicts changes induces through transition.
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Answer:
Nucleus (as nuclear DNA),mitochondrial(mitochondrial DNA) and chloroplasts.
DNA is packed tightly around protein called Histones, in Eukaryotes cells;so that many molecules can easily be held together as chromosomes.
Chromosomes are thread-like structure in nucleus of cells.The histones provide support to the DNA molecule
The part DNA molecule coded for by a polypeptide is GENE, therefore in the nucleus of cells, DNA contains GENE,and the gene and DNA are packed in chromosomes,DNA appears as circular DNA mitochondria
Explanation:
Bacterial cell walls are made of peptidoglycan (also called murein), which is made from polysaccharide chains cross-linked by unusual peptides containing D-amino acids. ... Gram-positive bacteria possess a thick cell wall containing many layers of peptidoglycan and teichoic acids.
Answer: Water, vacuum and air molecule i guess
Explanation: XXXXXXXXXXX
There appears to still be a lot of debate within science over whether humans or climate change were primarily responsible for the extinction of many of the large mammals during this period. One hypothesis supporting the link to early human hunters is that large animals in sub-Saharan Africa co-evolved with humans as they learned how to use tools and developed ever more effective weapons. When early humans moved into Europe and Asia, taking with them their weapons and hunting skills, the populations of large animals in those areas were not accustomed to human hunting, and were therefore easy prey.
