Answer:
<h2>
Phosphorylation and dephosphorylation plays an important role in activating or inhibiting different proteins.</h2>
Explanation:
1. When Cdc25 is phosphorylated by M-Cdk, it activates the CdC25. It acts as checkpoint from G1 to S and G2 to M.
So, the correct answer is activates (A).
2. Phosphorylation of condensins by M-Cdk, degrades the condensin and begins the decondensation of chromosomes. That means it inactivates the condensin.
So, the correct answer is Inactivates (I).
3. Phosphorylation of APC/C activates it and then CdC20 can bind to it and then cell will progress through anaphase.
So, the correct answer is Activation (A).
4. Phosphorylation of Ndc80 by Aurora-B leads to binding of NdC80 to kinetochore and recruits the Ska complex at kinetochore.
So the correct answer is activates (A).
So, four-letter string is AIAA.
Answer and Explanation:
The Cretaceous–Paleogene extinction, which occurred around 66 million years ago, is defined as a mass extinction that wiped out around three-quarters of species on Earth.
Among the organisms that disappeared during this event, we find mammals, birds, fish, sharks, pterosaurs, birds, reptiles, insects, and some plant species.
This event is marked by the presence of a sediment layer known as the K-Ph boundary which showed important levels of iridium, an element that is abundant in craters. Therefore, after its discovery, scientists hypothesize this extinction occurred due to the impact of the giant Chicxulub crater which changed the conditions of the atmosphere.
Answer:
Greatly affect the population.
Explanation:
Environment and weather of a country greatly affect the population and people of a region because good environment with all resources and suitable weather attract people of other regions toward itself. If the location has plenty of water, vegetation, flat geography and food etc, the people settled in this location and increase occur in population whereas if the area doesn't have any natural resources so people migrate from that area.
Answer:
The diameter of the xylem vessels should be small in order for the capillary action to take place.
Explanation:
The vessels through which water is transported to different parts of the plants and trees are the xylem. Water is transported in the trees through a mechanism named as capillary action. This mechanism can occur only if the diameter of the vessels are small.
The water molecules adhere to the walls of xylem and an upward force is generated. If the diameter of the vessels i.e xylem would be small then the surface tension between the xylem and water molecules would be enough to move the water in an upward direction.
The reporting of the results of any new research or findings is a necessary step. The reporting of the new discovered drug for the treatment of cancer needs to be reported in a peer-reviewed journal as well. The peer-review helps in validating the authenticity of the results of a research. Publishing the findings in a peer-reviewed journal will allow other scientists to check the findings and ensure the reliability.
