For instance, a synapomorphy of mammals is that they all have mammary glands. The earliest organism that could be considered a mammal had mammary glands, and thus passed it down to all of its descendants. Because reptiles include such a large amount of morphologic diversity, the synapo...
One of the key adaptations that permitted reptiles to live on land was the development of theirscaly skin, containing the protein keratin and waxy lipids, which reduced water loss from the skin. A number of keratinous epidermal structures have emerged in the descendants of various reptilian lineag...
Reptiles have backbone and spines i.e. they are vertebrates. Reptiles have scales on their bodies and have a dry skin. Reptiles are cold blooded animals. Reptiles lay eggs. Reptiles have lungs and need air to breathe. Reptiles either have four legs or have no legs at all. ...
Males are larger than females, possess bony odontoid processes (fangs) and have enlarged heads. While all members of this clade are sexually dimorphic in this suite of characters, the degree of development of the secondary sexual characteristics in males varies widely across species. One of the ...
What feature is found in all mollusks? What are some characteristics of cartilaginous fish? What are the characteristics of an amoeba? What characteristics distinguish reptiles from amphibians? Do annelids have exoskeletons? What are the characteristics of amoeba offspring?
Based on this observation, researchers have thus cultivated single sex broods such as all-male or all-female by artificial gynogenesis, sex hormone treatments, and induction of pseudo-male (XX-male) and super-male (YY-male). One of the biggest problems is the disruption of local ecosystems ...
scutes, whereas turtles and crocodiles have scutes. These structures prevent water loss to a large extent. In case of lizards, scales can be in the form of keratinized epidermis, or in tubercular form. Almost all reptiles have scales or scutes. Non-reptiles like fish too have this feature....
百度试题 结果1 题目Mammals have unique characteristics ___ make them different from reptiles. A. that B. who C. which D. where 相关知识点: 试题来源: 解析 C。先行词是 characteristics,关系代词 which 引导定语从句。反馈 收藏
We have presented a formal model for the quantitative analysis of phylogenetic and specific effects on the distribution of trait values among species. Tota... JM Cheverud - 《Evolution》 被引量: 1092发表: 0年 Sexual size differences in reptiles / Volume: Misc. Publ. no. 70, p. 1-72 HS...
step in the evolution of reptiles fromfishes. Modern amphibians are united by several unique traits. They typically have a moist skin and rely heavily on cutaneous (skin-surface)respiration. They possess a double-channeled hearing system, greenrodsin their retinas to discriminate hues, and pedicel...