Also known as B chromosomes, these chromosomes are excess chromosomes resulting from unsuccessful meiotic divisions where resultant cells have extra chromosomes. A common reason for this happening is Non-Disjunction, where the split of chromosomes into daughter haploid cells is uneven in number.
A balanced diet is essential to a healthy organism. Insufficiency or too much of a particular element or compound, such ..
This tutorial deals with the structure and function of flowers, fruits, and seeds. Also included here are the types of f..
Upon fertilization, a zygote forms and develops into an embryo. This tutorial elaborates on the growth and development f..
The body is comprised of different elements with hydrogen, oxygen, carbon, and nitrogen as the major four. This tutorial..
This tutorial elaborates on the physical development of humans, particularly from puberty to adulthood. Read this tutori..
Autotrophs flourished, absorbing carbon and light. Soon after, primitive life forms that could assimilate oxygen thrived..