Ch. 23 Cnidarian Diversity: Polyps QUESTIONS
The digestive track of the cnidarians consists only of a and a
(the coelenteron or )

The digestive tract of cnidarians consists of only of an orifice and a gastrovacular cavity (the coelenteron or blind gut)

Explanation:

Cnidarians are a group of simple organisms whose habitat is predominantly aquatic, such as sponges and jellyfish. They are diblastic organisms -as they are formed from two embryonic leaves, the ectoderm and gastroderm- and radial symmetry, with an incipient nervous system.

One of the main characteristics of Cnidarians is that they have a single orifice that communicates the exterior with the single cavity that forms the coelenteron, or gastrovascular cavity, which together form their digestive and excretory tracts. While in the cavity occur the processes of absorption of nutrients, distribution of them throughout the body and disposal of waste (vascular function), the single orifice acts as a mouth and anus.

both male and female gametes are produced by meiosis of the germ cells. therefore, both male and female gametes are haploid. one male and one female gamete unite during the fertilization to form the diploid zygote. in seed bearing plants, pollen grain is the male gametophyte, which produces sperm cells.