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.
In total, most human cells contain 46 chromosomes with 22 pairs of autosomes, or non-sex chromosomes, and two sex-determining chromosomes. The sex chromosomes in humans are called X and Y. Females carry two X chromosomes, while males carry one X and one Y chromosome. Cells of the body that contain two sets of chromosomes are called diploid.