You need to read the introduction like this
Ans.
In humans, there are total of 46 chromosomes in each cell that show 23 pairs of chromosome. During reproduction, meiosis occurs in germ cells that leads to formation of daughter cells or gametes that contain half of the chromosomes as present in parent cells. Thus, each gamete (either male or female) contains 23 chromosome.
During fertilization, fusion of male gamete or sperm(with 23 chromosomes) and female gamete or ovum(with 23 chromosomes) to form zygote that develops into multi-cellular offspring with 46 chromosomes.
Thus, 'a child inherit 46 chromosomes from his or her parent (23 chromosomes from each parent).'
1. anaphasespindle fibers pull back to the centromeres separating the sister chromatids, 2 sets of chromosomes are present
2. interphasecell grows, DNA is copies, organelles replicate
3. metaphasechromosomes line up in the middle of the cell on spindle fibers
4. telophasenuclear envelope forms, chromosomes unwind, spindle fibers dissolve
5. prophase chromosomes are visible, nuclear envelope breaks down, spindle fibers from between centrosomes
The sugar and other organic molecules are transported through the plant by means of a special layer of tissue called phloem. By this means, nutrients can be moved from the photosynthetic site (the source) to the place where the sugar is being used (the sink) whether it is up or down the stem of the plant.
