Answer:
B. Year 5.
Explanation:
In 5 years time the turtle population reached the carrying capacity of the pond. Carrying capacity of pond refers to the population of marine animals such as fishes, turtles etc can live and survive on the natural food available in the pond. If the food is present in large amount, than carrying capacity of the ecosystem is large. In pond ecosystem, the population of turtle decreases because the food is not sufficient to feed the existing population.
Answer:
Photosystem II electron flow would stop.
Photosystem I electron flow would probably slow down but not stop.
Explanation:
In photosystem II, electron flow is exclusively dependent on pheophytin which transfers electron from the excited reaction-center P680, to cytochrome <em>b₆f </em>complex<em> </em>and then the electrons are transferred to photosystem I via plastocyanin.<em> </em>Any inhibitor of electron passage through pheophytin will thus, ultimately stop electron flow through Photosystem II.
However, in the case of Photosystem I, even if electron flow through pheophytin is inhibited, it has an alternate pathway for electron flow known as the cyclic electron flow. In cyclic electron flow, electrons passing through its reaction-center P700 does not continue to NADP⁺, but is recycled back through cytochrome <em>b₆f </em>complex<em> </em>to plastocyanin and back to P700. Thus, electrons can continue flowing but at a probably slower rate since no new electrons are coming from Photosystem II.
Earth has seasons because its axis is tilted.
Isokinetic exercise is often used to regain muscle strength
Answer:
Cells become cancer cells largely because of mutations in their genes. Often many mutations are needed before a cell becomes a cancer cell. The mutations may affect different genes that control cell growth and division. Some of these genes are called tumor suppressor genes.
Explanation: