They determine the north and south ends
Carbon dioxide because every other option requires an input.
If the larva had one head at the posterior pole, it would be normal. The larva would have two heads, one at the front of its body and the other in the center.
What is bicoid mRNA?
When translated, bicoid protein forms a morphogen gradient that shapes the embryo's head and thorax if bicoid mRNA localizes to the anterior of the Drosophila egg.
How does the egg's bicoid RNA influence development?
According to recent research, Bicoid specifies the anterior of the Drosophila embryo in two different ways. It initially suppresses posterior development. It accomplishes this by attaching to and preventing caudal RNA, which is distributed throughout the egg and early embryo, from being translated.
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Competitive advantages of apple were;
Apple preferred Horizontal and vertical integration around its products instead of licensing it or making it open market or sharing the technology.
Easy to use- they focused on ease of operation and simple user interface.
Facility of plug and play so that non-technical users do not face any issues.
Uniqueness and innovation in enhancing consumer's digital life for example- Digital Hub- an advantage for consumers who were becoming entrenched in a digital lifestyle, using digital cameras, portable music players and digital camcorders and mobile phones.
Investment in R&D brought the key competitive advantage to apple.