Explanation:
The two stages of the water cycle require heat energy from the sun is evaporation and precipitation.
Answer:
Explanation:
A. Inactivation of an enzyme that degrades M-Cyclin.
M-phase cyclins form M-CDK complexes and drive the cell's entry into mitosis from G2 phase as non-degradation of M-Cyclin resulting from inactivated enzyme can only result in constitutive entry of the cell in to M phase instead cell cycle being arrested at G2 phase,
B. Inactivation of the Wee-1 kinase.
Wee1 is a nuclear kinase that plays a key role in regulating cell cycle progression. Wee1 inhibits the entry of the cell into M phase by inhibiting Cdk1. Wee1 phosphorylates Cdk1 there inhibiting the kinase activity of Cdk1 which is essential for progression from G2 to M phase. As such any mutation of wee1, and the resulting loss of activity will result in premature entry of cells into M phase instead of getting arrested at the G2 phase resulting in smaller yeast cell.
C. Inactivation of the Cdc25 phosphatase
CDC25 phosphatases removes inhibitory phosphate residues from cyclin dependent kinases resulting in the activation of CDKs which causes the cells in G2 phase to entry to M phase. Mutation in CDC25 phosphates removes the ability of CDC25 to remove phosphate residues from CDKs thus preventing the entry into M-phase.
Therefore, mutant phenotype of cell cycle arrest prior to M phase can only result form mutation in
Cdc25 phosphatase(option 3)
Answer:
An invented long word said to mean a lung disease caused by inhaling very fine ash and sand dust.
Explanation:
The correct answer is A. His diet should include foods such as eggs, nuts, and fish.
Explanation:
The excerpt from the journal explains the importance of protein intake for athletes as this contributes to many body functions such as "enzyme production" or "growth and repair of tissues". In this context, athletes will need to have an appropriate protein intake, which is essential to growth muscles or repair them if there is a lesion. Moreover, this can be obtained through the intake of foods such as eggs, nuts, fish, grains, among others. In this context, the best decision is expressed in option A.
