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.
The DNA in all human cells except eggs and sperm is housed in 46 chromosomes. Eggs and sperm consist of only half that number, 23 chromosomes per cell. Every person inherits one set of chromosomes from their mother (in the egg) and the other set of chromosomes from their father (in the sperm).