The number of chromosomes in a cell. In humans, the normal haploid chromosome Number is 23, (or the diploid chromosome Number is 46). The highest diploid number of chromosomes so far is 1600 in Aulacantha (protozoa). Genetic mutations can result in varying chromosome numbers to the genome norm, which usually have disadvantageous results.
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. ..
The body is comprised of different elements with hydrogen, oxygen, carbon, and nitrogen as the major four. This tutorial will help you understand the chemical composition of the body. This will come in handy when considering the various interactions between cells and structures. ..
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...
This lesson looks at population attributes, regulation, and growth. It also covers population genetics, particularly genetic variations, natural selection, genetic drift, genetic migration, and speciation...
This lesson is about the methods used for ecological research, such as quadrat and transect sampling, canopy fogging, and netting in determining biodiversity...
