These leaves grow horizontally, so that the majority of photosynthetic cells are facing upwards and receiving light in the day for photosynthesis. The majority of stomata are found on the lower half so that transpiration does not increase during the day. Dorsiventral leaves can either be 1) simple, consisting of one leave or 2) compound, consisting of many leaves stemming from the same petiole.
Following nine months inside the mother's womb is the birth of the baby. Know the different stages of the birthing proce..
This tutorial elucidates body temperature regulation. Know the details here to learn how the body sets the body temperat..
This tutorial presents Gregor Mendel's law of dominance. Learn more about this form of inheritance and how it can be pre..
A balanced diet is essential to a healthy organism. Insufficiency or too much of a particular element or compound, such ..
Hormones are chemical messengers produced by specialized glands and they were produced by switching on the genes designe..
This tutorial looks at the relationship between organisms. It also explores how energy is passed on in the food chain an..