Answer: 6. Although most invertebrates have a nervous system, the complexity of the system varies from one organism to another.
Some invertebrates such as the hydra and starfish have a simplified system of nerves, which is called a nerve net. It consists of just nerves, capable of sense and touch only. Meanwhile, other invertebrates such as the planarian have a more developed nervous system, complete with a brain and nerve cord.
7. Radial symmetry and bilateral symmetry are two different types of biological symmetries found in organisms. ... The key difference between radial and bilateral symmetry is that radial symmetry generates identical body halves around the central axis whereas bilateral symmetry generates only two sides as left and right.
Explanation:
it was the challenger and The expedition was led by British naturalist John Murray and Scottish naturalist Charles Wyville Thompson
Answer:
urethra is the word ur looking for
Explanation:
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Explanation:
Aerobic respiration is more efficient than anaerobic respiration because the former produces a net of 34 ATPs while the latter produces a net of 2 ATPs in one cycle. Therefore with enough oxygen supply, most cells with both options opt will utilize aerobic respiration.
However, occasionally, the cell's energy demands are usually higher than the oxygen supply (such as during an athlete's short fast sprint), hence, in this case, the cells shift to anaerobic respiration to power the cell activities.
Anaerobic respiration evolved first because the first cells had to live in earth whose atmosphere was mainly carbon dioxide and methane. However after the Great Oxygenation event, organisms evolved to utilize oxygen in cellular respiration.
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For more on anaerobic and aerobic respiration check out;
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Yes it does remove carbonic acid