Animals with nerve nets have a. no specialized neurons. b. sensory neurons but no interneurons. c. interneurons but no sensory neurons. d. only motor neurons

The correct answer is option (A) no specialized neurons.

Nerve net refers to the simplest and the primitive form of the nervous system found in multicellular oraganisms. It is found in the members of Cnidaria, Ctenophora and Echinodermata. Nerve net provides the ability to sense objects, food particles by the presence of the sensory neurons in it. A nerve net is made up of diffuse network of cells forming a ganglion but does not form a brain. Since it does not form a brain it lacks the specialized neurons. It is made up of the sensory neurons that sense the stimulus and the motor neurons that produce a reaction to the stimulus.

•there must be variation for the particular trait within a population.

•the variation must be inheritable (that is, it must be capable of being passed on from the parents to their offspring).

•individuals with one version of the trait must produce more offspring than those with a different version of the trait.good

explanation:

any abiotic or biotic factor in an ecosystem that causes a population's size to slow or decrease is a limiting factor.