The human body is capable of regulating growth and energy balance through various feedback mechanisms. Get to know the e..
Different pregnancy and birth control and contraception strategies are described. Read this tutorial to learn each of th..
Molecules move within the cell or from one cell to another through different strategies. Transport may be in the form of..
Humans are capable of only one mode of reproduction, i.e. sexual reproduction. Haploid sex cells (gametes) are produced ..
It only takes one biological cell to create an organism. A single cell is able to keep itself functional through its 'mi..
Ferns and their relatives are vascular plants, meaning they have xylem and phloem tissues. Because of the presence of va..
