Division
1. The act of dividing.
2. (Science: zoology) a rank that if treated as a division of a genus or subgenus is deemed to be of subgeneric rank for the purposes of nomenclature.
3. A taxon at the rank of division. The second highest taxonomic classification for the kingdoms Plantae (plants) and fungi, between kingdom level and class level.
Genes are expressed through the process of protein synthesis. This elaborate tutorial provides an in-depth review of the different steps of the biological production of protein starting from the gene up to the process of secretion. Also included are topics on DNA replication during interphase of the cell cycle, DNA mutation and repair mechanisms, gene pool, modification, and diseases...
Plants are characterized by having alternation of generations in their life cycles. This tutorial is a review of plant mitosis, meiosis, and alternation of generations. ..
Plant cells have plastids essential in photosynthesis. They also have an additional layer called cell wall on their cell exterior. Although animal cells lack these cell structures, both of them have nucleus, mitochondria, endoplasmic reticulum, etc. Read this tutorial to learn plant cell structures and their roles in plants...
Ferns and their relatives are vascular plants, meaning they have xylem and phloem tissues. Because of the presence of vascular tissue, the leaves of ferns and their relatives are better organized than the mosses and liverworts. ..
Humans are capable of only one mode of reproduction, i.e. sexual reproduction. Haploid sex cells (gametes) are produced so that at fertilization a diploid zygote forms. This tutorial is an in-depth study guide regarding male and female reproductive physiology...
