Humans are capable of only one mode of reproduction, i.e. sexual reproduction. Haploid sex cells (gametes) are produced ..
Upon fertilization, a zygote forms and develops into an embryo. This tutorial elaborates on the growth and development f..
The blood sugar level is regulated by two hormones. The mechanism behind this type of negative feedback control is descr..
Find out more about New Zealand's unique biodiversity by exploring a range of different ecosystems and the key role of s..
This tutorial elaborates on how the nervous system works, particularly at the tissue level of the brain. There are three..
With regard to the population size of a species and what factors may affect them, two factors have been defined. They ar..
