Leaf diseases of deciduous hardwood trees are grouped. into six categories, to simplify their identification, as follows 1. (See Figure 1a-f for a pictorial representation of the symptoms.) AnthracnoseâIrregular dead areas on leaf margins, between. and across and/or along veins, often moving onto the.
That depends on what organism the cell belongs to. A nucleus of a normal human cell contains 46 chromosomes, whereas this is a double chromosome set, i.e. we have 23 pairs of chromosomes that are used for the same functions. Two chromosomes that fulfill the same functions are called homologous.
These tiny structures are found inside the cell nucleus and consist of DNA and proteins. There are 46 human chromosomes inside most cells. 44 are autosomes, that is non-sex chromosomes and two are the sex chromosomes - X and Y. The chromosomes are all of different sizes and contain varying number of genes. The structure of human chromosomes change during the life cycle of the cell as it grows and divides.