Virus
It needs to hijack the cells genetic machinery to reproduce
Answer:
Cacti
Explanation:
The well know desert plant Cacti have been a very interesting speciman in terms of survival and its adaptation to its enviornment in order to succeed in the game of survival.
- In order to maintain the moisture within the plant, its leaves are in the shape of needles which can lead to less water evoporating from the plant.
- The inners of Cacti have been modified to store water for prolonged periods of time in order to survive the long periods of drought and lack of water.
- The structure and outer skin of the Cactus has been able to help them once again maintain water levels within itself as traits such as waxy and thick skin cover the entirety of the plant.
Answer: Junk DNA.
It does not code for protein and for a long time scientists thought it was useless. Hence the Junk DNA name.
Answer:
Positive feedback loop
Explanation:
Thrombin is a protease which is involved in the physiological role of blood clotting and homeostasis. A Blood clot is formed when a mesh-like structure is formed with the fibrin molecules.
The formation of fibrin molecules requires thrombin proteases which converts the fibrinogen to fibrin molecules. To produce more fibrin molecules, thrombin is required in higher amount.
To produce a high amount of thrombin, thrombin stimulates its production. Such physiological loop where the production of the product proceeds reaction in the forward direction and stimulates its production is known as a positive feedback loop.
Thus, a positive feedback loop is the correct answer.
