I believe it is behavioural isolation. When there are changes within a certain species, e.g. new birdcalls are formed in certain individuals in a species, "traditional" birds may not like such mating calls and only choose to mate with the more common birdcalls from majority of the birds. There are also some birds that may like the new birdcalls, and choose to mate with birds with those birdcalls. They become genetically isolated as they continue such behavior. Eventually, through genetic drift and other mutations, different species form from a single specie.
Hope this helps! :)
Photothenysis disorder plants leafs dying
Answer:
Explanation:
A cell is adapted to its function because of differential expression of genes during fetal development during which they get differentiated and determined to provide division of labour to different tissues. They contain protein fibres that can contract when energy is available, making the cells shorter.
Answer:
Prokaryotic: Bacteria, no major organelles
Both: Cell membrane
Eukaryotic: Animal cell, plant cell
Explanation:
Bacteria are single-celled organisms that are quite simple with no nucleus or major organelles.
Both prokaryotic and eukaryotic cells have cell membrane.
Animal and plant cells have major organelles and a cell wall which are not characteristics of prokaryotic cells but are characteristics of eukaryotic cells.
