Why animals can reproduce in large number?
Animals have limited amounts of energy they can use for reproduction. Animals with high fecundity spend their energy in the production of many offspring that do not require much care. Alternatively, animals with low fecundity produce fewer offspring, and have more energy to care for those offspring.
What is the importance of cell division in the life of an organism?
Cell division plays an important role in all living organisms, as it is essential for growth, repair and reproduction. This process helps in: Renewing of damaged cells. Production of new cells from older ones.
What are the three important functions of cell division?
The three main functions of cell division are reproduction, growth and gamete formation.
Which is the most important factor affecting the timing of cell division?
There are two major processes in cell growth that affect the timing of cell division: replication of the chromosome and septum formation between two chromosome clusters.
Which hormone is responsible for normal cell cycle?
human growth hormone
What hormone stimulates cell division in humans?
Growth hormone
What are two positive effects of the cell cycle on the human body?
One of the two positive effects of the cell cycle would be how the immune system benefits because the cell cycle makes more white blood cells.
What is the life cycle of a cell?
The cell cycle is a four-stage process in which the cell increases in size (gap 1, or G1, stage), copies its DNA (synthesis, or S, stage), prepares to divide (gap 2, or G2, stage), and divides (mitosis, or M, stage). The stages G1, S, and G2 make up interphase, which accounts for the span between cell divisions.
What is the most important role of the G2 checkpoint?
The G2 checkpoint bars entry into the mitotic phase if certain conditions are not met.. However, the most important role of the G2 checkpoint is to ensure that all of the chromosomes have been replicated and that the replicated DNA is not damaged.
What are three things that are checked at the G2 checkpoint?
Cell size, nutrient, growth factor, and DNA damage 2. What are three things that are “checked” at the G2 checkpoint? DNA replication, DNA damage, 3.
What occurs during the S phase?
S phase. In S phase, the cell synthesizes a complete copy of the DNA in its nucleus. It also duplicates a microtubule-organizing structure called the centrosome. The centrosomes help separate DNA during M phase.
What does S stand for and what occurs in this stage?
The S stage stands for “Synthesis”. This is the stage when DNA replication occurs. The G2 stage stands for “GAP 2”.
What is the purpose of a checkpoint?
The primary purpose of checkpoints is to deter impaired driving, not to increase arrests. Police generally arrest impaired drivers detected at checkpoints and publicize those arrests, but arrests at checkpoints should not be used as a measure of checkpoint effectiveness.