Answer:
1 living organisms are composed of one or more cells.
2 The cell is the basic unit of structure and organization in organisms.
3 Cells arise from pre-existing cells.
Answer:
Birds can keep themselves warn without any external heat source which is not the case with reptiles and amphibians
Explanation:
Birds are able to generate heat means they are endothermic. They generate heat through various metabolic processes. They have air pockets beneath their feathers to insulate their bodies during cold temperatures. Feathers which are modified reptilian scales help birds to streamline their exterior body and structure feathers in a way that it insulates the body.
Answer:
C
new combinations means variations, and the more the variations there is of a species, the more diverse they are
I'm going with C. It may be wrong but I think it's C.
