Which of the following divisions of the animal kingdom lack circulatory and resp

Question

Which of the following divisions of the animal kingdom lack circulatory and respiratory systems, and have a rudimentary excretory system? Flatworms Nematodes Arthropods Cnidarians Which of the following is NOT a characteristic feature of the phylum Chordata? a post-anal tail pharyngeal gill slits a notochord segmented body a dorsal hollow nerve cord The population size of a species capable of being supported by the environment is called its _____. limit logistic growth pattern biotic potential carrying capacity

Explanation / Answer

25. Answer- Flatworms

Flatworms are aceolomates. They are triploblastic and lack respiratory and circulatory systems. And they have rudimentary excretory system. As they are aceolomates, so they do not contain any body cavities or spaces with outer surface. Flatworms have an excretory system with a network of tubules throughout the body.. so the waste fluids are removed from the whole body. And so they have rudimentary excretory system.

26. Answer- Segmented body

Phyllum chordata animals, possess 4 characteristic features-

*A post anal tail

*A notocord

*A dorsal hollow nerve cord

*Pharyngeal gill slits.

Segmented body is not one of them. So this the answer

27. Answer- Carrying capacity

Carrying capacity f a species in an environment is the maximum population size of the species that the environment can sustain with the food water and the other requirements for a better living.

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