Complex nervous system is not a feature found in nematodes and is denoted as option A.
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What are Nematodes?</h3>
They are also referred to as roundworm and have unsegmented thread-like body with a distinct mouth and anus.
They have a simple nervous system which runs along the length and width of the organism.
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Answer:
plant cells have a cell wall and animal cells dont
Answer:
The first one.
Explanation:
Plants use carbon dioxide to release oxygen. Without trees, the carbon dioxide does not get used.
Answer:
The basis of classification has also been changing with changing species concept. For example:
Typological species concept: During this concept, the classification was based on the similarities and differences in the physical characteristics of the organisms.
Biological species concept: Under this concept, the classification is based on the similarities that different organisms share and their ability to breed with each other to produce a fertile offspring.
Phylogenetic species concept: Classification is mainly based on the evolutionary history.