Briefly describe the reproductive behavior of frogs. In what impor-tant ways do leopard frogs (Lithobates pipiens) and pygmy salamanders (Desmognathus wrighti) differ in their reproduction?

Define adaptation. How could you use a comparative approach to test whether mesoglea within a scyphozoan medusa was an adaptation for buoyancy? How could you use a different criterion to test whether the eyes of cubozoans were adaptive? Where would a comparative approach prove a better way to assess the adaptive values of a tegument in internal parasites: in tapeworms or nematodes? Why?

Q28: Please type the answer to this question  Some salamanders exhibit neoteny, becoming sexually mature while still retaining some larval characteristics. In some species, the neotenic characteristics have become a permanent state of the species (obligate neoteny = paedogenesis; both are called paedomorphic conditions). These have lost the ability to undergo complete metamorphosis (hellbender, amphiuma, and mudpuppy). In others, the animal does not undergo complete metamorphosis in nature, but can be induced to do so in the lab.  An example of this is the Mexican axolotl (Ambystoma mexicanum), a large gilled salamander found in Mexico.  In some species of salamanders, members of a population exhibit neoteny only when they are under stressful environmental conditions (such as crowding, scarce food, low concentrations of trace elements). This is called facultative neoteny.  Tiger Salamanders (Ambvstoma tigrinum) frequently do this, but local populations of marbled salamanders show a…

What are some adaptive advantages in terms of the body structure of insects?

Give a short note on the reproductive system of Rana?

What mode of reproduction in fishes is described by each of the fol-lowing terms: oviparous, ovoviviparous, viviparous?

Describe the reproductive sysytem of male or female lizard?

When reproducing the majority of bony fish are: Group of answer choices Mitotic Ovoviviparous Viviparous Placental Oviparous

Briefly describe three features that insects have evolved to avoid predation.

What is one challenge posed by copulation between separate sexes? What are some adaptations that grasshoppers have developed that address these challenges?